复合控件、组合控件、自定义服务控件

最近做项目，脑子发热想全用代码实现，就开始了服务器控件的探索，凭借一点点书上看来的东西，其它不说，先贴上几个常用控件反编译后的代码。

[SupportsEventValidation, DefaultProperty("Text"), ToolboxData("<{0}:Button runat=\"server\" Text=\"Button\"></{0}:Button>"), DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), Designer("System.Web.UI.Design.WebControls.ButtonDesigner, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), DefaultEvent("Click"), AspNetHostingPermission(SecurityAction.LinkDemand, Level=200), AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=200)]
public class Button : WebControl, IButtonControl, IPostBackEventHandler
{
    // Fields
    private static readonly object EventClick = new object();
    private static readonly object EventCommand = new object();

    // Events
    [WebCategory("Action"), WebSysDescription("Button_OnClick")]
    public event EventHandler Click
    {
        add
        {
            base.Events.AddHandler(EventClick, value);
        }
        remove
        {
            base.Events.RemoveHandler(EventClick, value);
        }
    }

    [WebCategory("Action"), WebSysDescription("Button_OnCommand")]
    public event CommandEventHandler Command
    {
        add
        {
            base.Events.AddHandler(EventCommand, value);
        }
        remove
        {
            base.Events.RemoveHandler(EventCommand, value);
        }
    }

    // Methods
    public Button() : base(HtmlTextWriterTag.Input)
    {
    }

    protected override void AddAttributesToRender(HtmlTextWriter writer)
    {
        bool useSubmitBehavior = this.UseSubmitBehavior;
        if (this.Page != null)
        {
            this.Page.VerifyRenderingInServerForm(this);
        }
        if (useSubmitBehavior)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Type, "submit");
        }
        else
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Type, "button");
        }
        PostBackOptions postBackOptions = this.GetPostBackOptions();
        string uniqueID = this.UniqueID;
        if ((uniqueID != null) && ((postBackOptions == null) || (postBackOptions.TargetControl == this)))
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Name, uniqueID);
        }
        writer.AddAttribute(HtmlTextWriterAttribute.Value, this.Text);
        bool isEnabled = base.IsEnabled;
        string firstScript = string.Empty;
        if (isEnabled)
        {
            firstScript = Util.EnsureEndWithSemiColon(this.OnClientClick);
            if (base.HasAttributes)
            {
                string str3 = base.Attributes["onclick"];
                if (str3 != null)
                {
                    firstScript = firstScript + Util.EnsureEndWithSemiColon(str3);
                    base.Attributes.Remove("onclick");
                }
            }
            if (this.Page != null)
            {
                string postBackEventReference = this.Page.ClientScript.GetPostBackEventReference(postBackOptions, false);
                if (postBackEventReference != null)
                {
                    firstScript = Util.MergeScript(firstScript, postBackEventReference);
                }
            }
        }
        if (this.Page != null)
        {
            this.Page.ClientScript.RegisterForEventValidation(postBackOptions);
        }
        if (firstScript.Length > 0)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Onclick, firstScript);
            if (base.EnableLegacyRendering)
            {
                writer.AddAttribute("language", "javascript", false);
            }
        }
        if (this.Enabled && !isEnabled)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "disabled");
        }
        base.AddAttributesToRender(writer);
    }

    protected virtual PostBackOptions GetPostBackOptions()
    {
        PostBackOptions options = new PostBackOptions(this, string.Empty);
        options.ClientSubmit = false;
        if (this.Page != null)
        {
            if (this.CausesValidation && (this.Page.GetValidators(this.ValidationGroup).Count > 0))
            {
                options.PerformValidation = true;
                options.ValidationGroup = this.ValidationGroup;
            }
            if (!string.IsNullOrEmpty(this.PostBackUrl))
            {
                options.ActionUrl = HttpUtility.UrlPathEncode(base.ResolveClientUrl(this.PostBackUrl));
            }
            options.ClientSubmit = !this.UseSubmitBehavior;
        }
        return options;
    }

    protected virtual void OnClick(EventArgs e)
    {
        EventHandler handler = (EventHandler) base.Events[EventClick];
        if (handler != null)
        {
            handler(this, e);
        }
    }

    protected virtual void OnCommand(CommandEventArgs e)
    {
        CommandEventHandler handler = (CommandEventHandler) base.Events[EventCommand];
        if (handler != null)
        {
            handler(this, e);
        }
        base.RaiseBubbleEvent(this, e);
    }

    protected internal override void OnPreRender(EventArgs e)
    {
        base.OnPreRender(e);
        if ((this.Page != null) && base.IsEnabled)
        {
            if ((this.CausesValidation && (this.Page.GetValidators(this.ValidationGroup).Count > 0)) || !string.IsNullOrEmpty(this.PostBackUrl))
            {
                this.Page.RegisterWebFormsScript();
            }
            else if (!this.UseSubmitBehavior)
            {
                this.Page.RegisterPostBackScript();
            }
        }
    }

    protected virtual void RaisePostBackEvent(string eventArgument)
    {
        base.ValidateEvent(this.UniqueID, eventArgument);
        if (this.CausesValidation)
        {
            this.Page.Validate(this.ValidationGroup);
        }
        this.OnClick(EventArgs.Empty);
        this.OnCommand(new CommandEventArgs(this.CommandName, this.CommandArgument));
    }

    protected internal override void RenderContents(HtmlTextWriter writer)
    {
    }

    void IPostBackEventHandler.RaisePostBackEvent(string eventArgument)
    {
        this.RaisePostBackEvent(eventArgument);
    }

    // Properties
    [WebSysDescription("Button_CausesValidation"), WebCategory("Behavior"), DefaultValue(true), Themeable(false)]
    public virtual bool CausesValidation
    {
        get
        {
            object obj2 = this.ViewState["CausesValidation"];
            if (obj2 != null)
            {
                return (bool) obj2;
            }
            return true;
        }
        set
        {
            this.ViewState["CausesValidation"] = value;
        }
    }

    [Bindable(true), DefaultValue(""), Themeable(false), WebCategory("Behavior"), WebSysDescription("WebControl_CommandArgument")]
    public string CommandArgument
    {
        get
        {
            string str = (string) this.ViewState["CommandArgument"];
            if (str != null)
            {
                return str;
            }
            return string.Empty;
        }
        set
        {
            this.ViewState["CommandArgument"] = value;
        }
    }

    [Themeable(false), WebCategory("Behavior"), WebSysDescription("WebControl_CommandName"), DefaultValue("")]
    public string CommandName
    {
        get
        {
            string str = (string) this.ViewState["CommandName"];
            if (str != null)
            {
                return str;
            }
            return string.Empty;
        }
        set
        {
            this.ViewState["CommandName"] = value;
        }
    }

    [Themeable(false), WebSysDescription("Button_OnClientClick"), DefaultValue(""), WebCategory("Behavior")]
    public virtual string OnClientClick
    {
        get
        {
            string str = (string) this.ViewState["OnClientClick"];
            if (str == null)
            {
                return string.Empty;
            }
            return str;
        }
        set
        {
            this.ViewState["OnClientClick"] = value;
        }
    }

    [DefaultValue(""), WebCategory("Behavior"), WebSysDescription("Button_PostBackUrl"), Editor("System.Web.UI.Design.UrlEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor)), Themeable(false), UrlProperty("*.aspx")]
    public virtual string PostBackUrl
    {
        get
        {
            string str = (string) this.ViewState["PostBackUrl"];
            if (str != null)
            {
                return str;
            }
            return string.Empty;
        }
        set
        {
            this.ViewState["PostBackUrl"] = value;
        }
    }

    [WebSysDescription("Button_Text"), WebCategory("Appearance"), DefaultValue(""), Localizable(true), Bindable(true)]
    public string Text
    {
        get
        {
            string str = (string) this.ViewState["Text"];
            if (str != null)
            {
                return str;
            }
            return string.Empty;
        }
        set
        {
            this.ViewState["Text"] = value;
        }
    }

    [WebSysDescription("Button_UseSubmitBehavior"), WebCategory("Behavior"), DefaultValue(true), Themeable(false)]
    public virtual bool UseSubmitBehavior
    {
        get
        {
            object obj2 = this.ViewState["UseSubmitBehavior"];
            if (obj2 != null)
            {
                return (bool) obj2;
            }
            return true;
        }
        set
        {
            this.ViewState["UseSubmitBehavior"] = value;
        }
    }

    [WebSysDescription("PostBackControl_ValidationGroup"), WebCategory("Behavior"), DefaultValue(""), Themeable(false)]
    public virtual string ValidationGroup
    {
        get
        {
            string str = (string) this.ViewState["ValidationGroup"];
            if (str != null)
            {
                return str;
            }
            return string.Empty;
        }
        set
        {
            this.ViewState["ValidationGroup"] = value;
        }
    }
}

 
Collapse Methods
 

[ParseChildren(true), PersistChildren(false), Themeable(true), AspNetHostingPermission(SecurityAction.LinkDemand, Level=200), AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=200)]
public class WebControl : Control, IAttributeAccessor
{
    // Fields
    private SimpleBitVector32 _webControlFlags;
    private const int accessKeySet = 4;
    private AttributeCollection attrColl;
    private StateBag attrState;
    private Style controlStyle;
    private const int deferStyleLoadViewState = 1;
    private const int disabledDirty = 2;
    private const int tabIndexSet = 0x10;
    private HtmlTextWriterTag tagKey;
    private string tagName;
    private const int toolTipSet = 8;

    // Methods
    protected WebControl() : this(HtmlTextWriterTag.Span)
    {
    }

    protected WebControl(string tag)
    {
        this.tagKey = HtmlTextWriterTag.Unknown;
        this.tagName = tag;
    }

    public WebControl(HtmlTextWriterTag tag)
    {
        this.tagKey = tag;
    }

    protected virtual void AddAttributesToRender(HtmlTextWriter writer)
    {
        if (this.ID != null)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Id, this.ClientID);
        }
        if (this._webControlFlags[4])
        {
            string accessKey = this.AccessKey;
            if (accessKey.Length > 0)
            {
                writer.AddAttribute(HtmlTextWriterAttribute.Accesskey, accessKey);
            }
        }
        if (!this.Enabled)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "disabled");
        }
        if (this._webControlFlags[0x10])
        {
            int tabIndex = this.TabIndex;
            if (tabIndex != 0)
            {
                writer.AddAttribute(HtmlTextWriterAttribute.Tabindex, tabIndex.ToString(NumberFormatInfo.InvariantInfo));
            }
        }
        if (this._webControlFlags[8])
        {
            string toolTip = this.ToolTip;
            if (toolTip.Length > 0)
            {
                writer.AddAttribute(HtmlTextWriterAttribute.Title, toolTip);
            }
        }
        if ((this.TagKey == HtmlTextWriterTag.Span) || (this.TagKey == HtmlTextWriterTag.A))
        {
            this.AddDisplayInlineBlockIfNeeded(writer);
        }
        if (this.ControlStyleCreated && !this.ControlStyle.IsEmpty)
        {
            this.ControlStyle.AddAttributesToRender(writer, this);
        }
        if (this.attrState != null)
        {
            AttributeCollection attributes = this.Attributes;
            IEnumerator enumerator = attributes.Keys.GetEnumerator();
            while (enumerator.MoveNext())
            {
                string current = (string) enumerator.Current;
                writer.AddAttribute(current, attributes[current]);
            }
        }
    }

    internal void AddDisplayInlineBlockIfNeeded(HtmlTextWriter writer)
    {
        if ((!this.RequiresLegacyRendering || !base.EnableLegacyRendering) && (((this.BorderStyle != BorderStyle.NotSet) || !this.BorderWidth.IsEmpty) || (!this.Height.IsEmpty || !this.Width.IsEmpty)))
        {
            writer.AddStyleAttribute(HtmlTextWriterStyle.Display, "inline-block");
        }
    }

    public void ApplyStyle(Style s)
    {
        if ((s != null) && !s.IsEmpty)
        {
            this.ControlStyle.CopyFrom(s);
        }
    }

    public void CopyBaseAttributes(WebControl controlSrc)
    {
        if (controlSrc == null)
        {
            throw new ArgumentNullException("controlSrc");
        }
        if (controlSrc._webControlFlags[4])
        {
            this.AccessKey = controlSrc.AccessKey;
        }
        if (!controlSrc.Enabled)
        {
            this.Enabled = false;
        }
        if (controlSrc._webControlFlags[8])
        {
            this.ToolTip = controlSrc.ToolTip;
        }
        if (controlSrc._webControlFlags[0x10])
        {
            this.TabIndex = controlSrc.TabIndex;
        }
        if (controlSrc.HasAttributes)
        {
            foreach (string str in controlSrc.Attributes.Keys)
            {
                this.Attributes[str] = controlSrc.Attributes[str];
            }
        }
    }

    protected virtual Style CreateControlStyle()
    {
        return new Style(this.ViewState);
    }

    protected override void LoadViewState(object savedState)
    {
        if (savedState != null)
        {
            Pair pair = (Pair) savedState;
            base.LoadViewState(pair.First);
            if (this.ControlStyleCreated || (this.ViewState["_!SB"] != null))
            {
                this.ControlStyle.LoadViewState(null);
            }
            else
            {
                this._webControlFlags.Set(1);
            }
            if (pair.Second != null)
            {
                if (this.attrState == null)
                {
                    this.attrState = new StateBag(true);
                    this.attrState.TrackViewState();
                }
                this.attrState.LoadViewState(pair.Second);
            }
        }
        object obj2 = this.ViewState["Enabled"];
        if (obj2 != null)
        {
            if (!((bool) obj2))
            {
                this.flags.Set(0x80000);
            }
            else
            {
                this.flags.Clear(0x80000);
            }
            this._webControlFlags.Set(2);
        }
        if (((IDictionary) this.ViewState).Contains("AccessKey"))
        {
            this._webControlFlags.Set(4);
        }
        if (((IDictionary) this.ViewState).Contains("TabIndex"))
        {
            this._webControlFlags.Set(0x10);
        }
        if (((IDictionary) this.ViewState).Contains("ToolTip"))
        {
            this._webControlFlags.Set(8);
        }
    }

    public void MergeStyle(Style s)
    {
        if ((s != null) && !s.IsEmpty)
        {
            this.ControlStyle.MergeWith(s);
        }
    }

    protected internal override void Render(HtmlTextWriter writer)
    {
        this.RenderBeginTag(writer);
        this.RenderContents(writer);
        this.RenderEndTag(writer);
    }

    public virtual void RenderBeginTag(HtmlTextWriter writer)
    {
        this.AddAttributesToRender(writer);
        HtmlTextWriterTag tagKey = this.TagKey;
        if (tagKey != HtmlTextWriterTag.Unknown)
        {
            writer.RenderBeginTag(tagKey);
        }
        else
        {
            writer.RenderBeginTag(this.TagName);
        }
    }

    protected internal virtual void RenderContents(HtmlTextWriter writer)
    {
        base.Render(writer);
    }

    public virtual void RenderEndTag(HtmlTextWriter writer)
    {
        writer.RenderEndTag();
    }

    protected override object SaveViewState()
    {
        Pair pair = null;
        if (this._webControlFlags[2])
        {
            this.ViewState["Enabled"] = !this.flags[0x80000];
        }
        if (this.ControlStyleCreated)
        {
            this.ControlStyle.SaveViewState();
        }
        object x = base.SaveViewState();
        object y = null;
        if (this.attrState != null)
        {
            y = this.attrState.SaveViewState();
        }
        if ((x == null) && (y == null))
        {
            return pair;
        }
        return new Pair(x, y);
    }

    string IAttributeAccessor.GetAttribute(string name)
    {
        if (this.attrState == null)
        {
            return null;
        }
        return (string) this.attrState[name];
    }

    void IAttributeAccessor.SetAttribute(string name, string value)
    {
        this.Attributes[name] = value;
    }

    protected override void TrackViewState()
    {
        base.TrackViewState();
        if (this.ControlStyleCreated)
        {
            this.ControlStyle.TrackViewState();
        }
        if (this.attrState != null)
        {
            this.attrState.TrackViewState();
        }
    }

    // Properties
    [DefaultValue(""), WebCategory("Accessibility"), WebSysDescription("WebControl_AccessKey")]
    public virtual string AccessKey
    {
        get
        {
            if (this._webControlFlags[4])
            {
                string str = (string) this.ViewState["AccessKey"];
                if (str != null)
                {
                    return str;
                }
            }
            return string.Empty;
        }
        set
        {
            if ((value != null) && (value.Length > 1))
            {
                throw new ArgumentOutOfRangeException("value", SR.GetString("WebControl_InvalidAccessKey"));
            }
            this.ViewState["AccessKey"] = value;
            this._webControlFlags.Set(4);
        }
    }

    [Browsable(false), WebSysDescription("WebControl_Attributes"), DesignerSerializationVisibility(0)]
    public AttributeCollection Attributes
    {
        get
        {
            if (this.attrColl == null)
            {
                if (this.attrState == null)
                {
                    this.attrState = new StateBag(true);
                    if (base.IsTrackingViewState)
                    {
                        this.attrState.TrackViewState();
                    }
                }
                this.attrColl = new AttributeCollection(this.attrState);
            }
            return this.attrColl;
        }
    }

    [DefaultValue(typeof(Color), ""), TypeConverter(typeof(WebColorConverter)), WebSysDescription("WebControl_BackColor"), WebCategory("Appearance")]
    public virtual Color BackColor
    {
        get
        {
            if (!this.ControlStyleCreated)
            {
                return Color.Empty;
            }
            return this.ControlStyle.BackColor;
        }
        set
        {
            this.ControlStyle.BackColor = value;
        }
    }

    [WebCategory("Appearance"), DefaultValue(typeof(Color), ""), WebSysDescription("WebControl_BorderColor"), TypeConverter(typeof(WebColorConverter))]
    public virtual Color BorderColor
    {
        get
        {
            if (!this.ControlStyleCreated)
            {
                return Color.Empty;
            }
            return this.ControlStyle.BorderColor;
        }
        set
        {
            this.ControlStyle.BorderColor = value;
        }
    }

    [WebCategory("Appearance"), DefaultValue(0), WebSysDescription("WebControl_BorderStyle")]
    public virtual BorderStyle BorderStyle
    {
        get
        {
            if (!this.ControlStyleCreated)
            {
                return BorderStyle.NotSet;
            }
            return this.ControlStyle.BorderStyle;
        }
        set
        {
            this.ControlStyle.BorderStyle = value;
        }
    }

    [WebSysDescription("WebControl_BorderWidth"), DefaultValue(typeof(Unit), ""), WebCategory("Appearance")]
    public virtual Unit BorderWidth
    {
        get
        {
            if (!this.ControlStyleCreated)
            {
                return Unit.Empty;
            }
            return this.ControlStyle.BorderWidth;
        }
        set
        {
            this.ControlStyle.BorderWidth = value;
        }
    }

    [Browsable(false), WebSysDescription("WebControl_ControlStyle"), DesignerSerializationVisibility(0)]
    public Style ControlStyle
    {
        get
        {
            if (this.controlStyle == null)
            {
                this.controlStyle = this.CreateControlStyle();
                if (base.IsTrackingViewState)
                {
                    this.controlStyle.TrackViewState();
                }
                if (this._webControlFlags[1])
                {
                    this._webControlFlags.Clear(1);
                    this.controlStyle.LoadViewState(null);
                }
            }
            return this.controlStyle;
        }
    }

    [DesignerSerializationVisibility(0), Browsable(false), WebSysDescription("WebControl_ControlStyleCreated"), EditorBrowsable(EditorBrowsableState.Advanced)]
    public bool ControlStyleCreated
    {
        get
        {
            return (this.controlStyle != null);
        }
    }

    [WebCategory("Appearance"), CssClassProperty, DefaultValue(""), WebSysDescription("WebControl_CSSClassName")]
    public virtual string CssClass
    {
        get
        {
            if (!this.ControlStyleCreated)
            {
                return string.Empty;
            }
            return this.ControlStyle.CssClass;
        }
        set
        {
            this.ControlStyle.CssClass = value;
        }
    }

    [DefaultValue(true), WebCategory("Behavior"), Themeable(false), Bindable(true), WebSysDescription("WebControl_Enabled")]
    public virtual bool Enabled
    {
        get
        {
            return !this.flags[0x80000];
        }
        set
        {
            bool flag = !this.flags[0x80000];
            if (flag != value)
            {
                if (!value)
                {
                    this.flags.Set(0x80000);
                }
                else
                {
                    this.flags.Clear(0x80000);
                }
                if (base.IsTrackingViewState)
                {
                    this._webControlFlags.Set(2);
                }
            }
        }
    }

    [Browsable(true)]
    public override bool EnableTheming
    {
        get
        {
            return base.EnableTheming;
        }
        set
        {
            base.EnableTheming = value;
        }
    }

    [WebCategory("Appearance"), WebSysDescription("WebControl_Font"), DesignerSerializationVisibility(2), NotifyParentProperty(true)]
    public virtual FontInfo Font
    {
        get
        {
            return this.ControlStyle.Font;
        }
    }

    [WebSysDescription("WebControl_ForeColor"), DefaultValue(typeof(Color), ""), WebCategory("Appearance"), TypeConverter(typeof(WebColorConverter))]
    public virtual Color ForeColor
    {
        get
        {
            if (!this.ControlStyleCreated)
            {
                return Color.Empty;
            }
            return this.ControlStyle.ForeColor;
        }
        set
        {
            this.ControlStyle.ForeColor = value;
        }
    }

    [DesignerSerializationVisibility(0), Browsable(false)]
    public bool HasAttributes
    {
        get
        {
            return (((this.attrColl != null) && (this.attrColl.Count > 0)) || ((this.attrState != null) && (this.attrState.Count > 0)));
        }
    }

    [WebCategory("Layout"), DefaultValue(typeof(Unit), ""), WebSysDescription("WebControl_Height")]
    public virtual Unit Height
    {
        get
        {
            if (!this.ControlStyleCreated)
            {
                return Unit.Empty;
            }
            return this.ControlStyle.Height;
        }
        set
        {
            this.ControlStyle.Height = value;
        }
    }

    protected internal bool IsEnabled
    {
        get
        {
            for (Control control = this; control != null; control = control.Parent)
            {
                if (control.flags[0x80000])
                {
                    return false;
                }
            }
            return true;
        }
    }

    internal virtual bool RequiresLegacyRendering
    {
        get
        {
            return false;
        }
    }

    [Browsable(true)]
    public override string SkinID
    {
        get
        {
            return base.SkinID;
        }
        set
        {
            base.SkinID = value;
        }
    }

    [Browsable(false), DesignerSerializationVisibility(0), WebSysDescription("WebControl_Style")]
    public CssStyleCollection Style
    {
        get
        {
            return this.Attributes.CssStyle;
        }
    }

    [DefaultValue((short) 0), WebSysDescription("WebControl_TabIndex"), WebCategory("Accessibility")]
    public virtual short TabIndex
    {
        get
        {
            if (this._webControlFlags[0x10])
            {
                object obj2 = this.ViewState["TabIndex"];
                if (obj2 != null)
                {
                    return (short) obj2;
                }
            }
            return 0;
        }
        set
        {
            this.ViewState["TabIndex"] = value;
            this._webControlFlags.Set(0x10);
        }
    }

    [DesignerSerializationVisibility(0), Browsable(false)]
    protected virtual HtmlTextWriterTag TagKey
    {
        get
        {
            return this.tagKey;
        }
    }

    [Browsable(false), DesignerSerializationVisibility(0)]
    protected virtual string TagName
    {
        get
        {
            if ((this.tagName == null) && (this.TagKey != HtmlTextWriterTag.Unknown))
            {
                this.tagName = Enum.Format(typeof(HtmlTextWriterTag), this.TagKey, "G").ToLower(CultureInfo.InvariantCulture);
            }
            return this.tagName;
        }
    }

    [WebCategory("Behavior"), DefaultValue(""), WebSysDescription("WebControl_Tooltip"), Localizable(true)]
    public virtual string ToolTip
    {
        get
        {
            if (this._webControlFlags[8])
            {
                string str = (string) this.ViewState["ToolTip"];
                if (str != null)
                {
                    return str;
                }
            }
            return string.Empty;
        }
        set
        {
            this.ViewState["ToolTip"] = value;
            this._webControlFlags.Set(8);
        }
    }

    [DefaultValue(typeof(Unit), ""), WebSysDescription("WebControl_Width"), WebCategory("Layout")]
    public virtual Unit Width
    {
        get
        {
            if (!this.ControlStyleCreated)
            {
                return Unit.Empty;
            }
            return this.ControlStyle.Width;
        }
        set
        {
            this.ControlStyle.Width = value;
        }
    }
}

 
Collapse Methods
 

[Designer("System.Web.UI.Design.WebControls.CompositeControlDesigner, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), AspNetHostingPermission(SecurityAction.LinkDemand, Level=200), AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=200)]
public abstract class CompositeControl : WebControl, INamingContainer, ICompositeControlDesignerAccessor
{
    // Methods
    protected CompositeControl()
    {
    }

    public override void DataBind()
    {
        this.OnDataBinding(EventArgs.Empty);
        this.EnsureChildControls();
        this.DataBindChildren();
    }

    protected virtual void RecreateChildControls()
    {
        base.ChildControlsCreated = false;
        this.EnsureChildControls();
    }

    protected internal override void Render(HtmlTextWriter writer)
    {
        if (base.DesignMode)
        {
            this.EnsureChildControls();
        }
        base.Render(writer);
    }

    void ICompositeControlDesignerAccessor.RecreateChildControls()
    {
        this.RecreateChildControls();
    }

    // Properties
    public override ControlCollection Controls
    {
        get
        {
            this.EnsureChildControls();
            return base.Controls;
        }
    }
}

 
Collapse Methods
 

[ToolboxItem("System.Web.UI.Design.WebControlToolboxItem, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), Bindable(true), DefaultProperty("ID"), DesignerCategory("Code"), Designer("System.Web.UI.Design.ControlDesigner, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), DesignerSerializer("Microsoft.VisualStudio.Web.WebForms.ControlCodeDomSerializer, Microsoft.VisualStudio.Web, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", "System.ComponentModel.Design.Serialization.CodeDomSerializer, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), Themeable(false), ToolboxItemFilter("System.Web.UI", 3), AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=200), AspNetHostingPermission(SecurityAction.LinkDemand, Level=200)]
public class Control : IComponent, IDisposable, IParserAccessor, IUrlResolutionService, IDataBindingsAccessor, IControlBuilderAccessor, IControlDesignerAccessor, IExpressionsAccessor
{
    // Fields
    internal ControlAdapter _adapter;
    private string _cachedUniqueID;
    private ControlState _controlState;
    private string _id;
    private Control _namingContainer;
    private OccasionalFields _occasionalFields;
    internal Page _page;
    private Control _parent;
    private TemplateControl _templateControl;
    private VirtualPath _templateSourceVirtualDirectory;
    private StateBag _viewState;
    private const int automaticIDCount = 0x80;
    private const string automaticIDPrefix = "ctl";
    private static readonly string[] automaticIDs = new string[] { 
        "ctl00", "ctl01", "ctl02", "ctl03", "ctl04", "ctl05", "ctl06", "ctl07", "ctl08", "ctl09", "ctl10", "ctl11", "ctl12", "ctl13", "ctl14", "ctl15", 
        "ctl16", "ctl17", "ctl18", "ctl19", "ctl20", "ctl21", "ctl22", "ctl23", "ctl24", "ctl25", "ctl26", "ctl27", "ctl28", "ctl29", "ctl30", "ctl31", 
        "ctl32", "ctl33", "ctl34", "ctl35", "ctl36", "ctl37", "ctl38", "ctl39", "ctl40", "ctl41", "ctl42", "ctl43", "ctl44", "ctl45", "ctl46", "ctl47", 
        "ctl48", "ctl49", "ctl50", "ctl51", "ctl52", "ctl53", "ctl54", "ctl55", "ctl56", "ctl57", "ctl58", "ctl59", "ctl60", "ctl61", "ctl62", "ctl63", 
        "ctl64", "ctl65", "ctl66", "ctl67", "ctl68", "ctl69", "ctl70", "ctl71", "ctl72", "ctl73", "ctl74", "ctl75", "ctl76", "ctl77", "ctl78", "ctl79", 
        "ctl80", "ctl81", "ctl82", "ctl83", "ctl84", "ctl85", "ctl86", "ctl87", "ctl88", "ctl89", "ctl90", "ctl91", "ctl92", "ctl93", "ctl94", "ctl95", 
        "ctl96", "ctl97", "ctl98", "ctl99", "ctl100", "ctl101", "ctl102", "ctl103", "ctl104", "ctl105", "ctl106", "ctl107", "ctl108", "ctl109", "ctl110", "ctl111", 
        "ctl112", "ctl113", "ctl114", "ctl115", "ctl116", "ctl117", "ctl118", "ctl119", "ctl120", "ctl121", "ctl122", "ctl123", "ctl124", "ctl125", "ctl126", "ctl127"
     };
    private const string automaticLegacyIDPrefix = "_ctl";
    private const int controlAdapterResolved = 0x8000;
    private const int controlsCreated = 8;
    private const int controlStateApplied = 0x100000;
    private const int creatingControls = 0x100;
    private const int designMode = 0x10000;
    private const int designModeChecked = 0x20000;
    private const int disableChildControlState = 0x40000;
    private const int disableTheming = 0x1000;
    private const int disableViewState = 4;
    private const int enableThemingSet = 0x2000;
    internal const bool EnableViewStateDefault = true;
    internal static readonly object EventDataBinding = new object();
    private static readonly object EventDisposed = new object();
    internal static readonly object EventInit = new object();
    internal static readonly object EventLoad = new object();
    internal static readonly object EventPreRender = new object();
    internal static readonly object EventUnload = new object();
    internal SimpleBitVector32 flags;
    private const char ID_RENDER_SEPARATOR = '_';
    internal const char ID_SEPARATOR = '$';
    private const int idNotCalculated = 1;
    private const int idNotRequired = 0x40;
    private const int invisible = 0x10;
    private const int isNamingContainer = 0x80;
    internal const int isWebControlDisabled = 0x80000;
    internal const char LEGACY_ID_SEPARATOR = ':';
    private const int marked = 2;
    private const int mustRenderID = 0x800;
    private const int notVisibleOnPage = 0x200;
    private const int styleSheetApplied = 0x4000;
    private const int themeApplied = 0x400;
    private const int useGeneratedID = 0x200000;
    private const int visibleDirty = 0x20;

    // Events
    [WebSysDescription("Control_OnDataBind"), WebCategory("Data")]
    public event EventHandler DataBinding
    {
        add
        {
            this.Events.AddHandler(EventDataBinding, value);
        }
        remove
        {
            this.Events.RemoveHandler(EventDataBinding, value);
        }
    }

    [WebSysDescription("Control_OnDisposed")]
    public event EventHandler Disposed
    {
        add
        {
            this.Events.AddHandler(EventDisposed, value);
        }
        remove
        {
            this.Events.RemoveHandler(EventDisposed, value);
        }
    }

    [WebSysDescription("Control_OnInit")]
    public event EventHandler Init
    {
        add
        {
            this.Events.AddHandler(EventInit, value);
        }
        remove
        {
            this.Events.RemoveHandler(EventInit, value);
        }
    }

    [WebSysDescription("Control_OnLoad")]
    public event EventHandler Load
    {
        add
        {
            this.Events.AddHandler(EventLoad, value);
        }
        remove
        {
            this.Events.RemoveHandler(EventLoad, value);
        }
    }

    [WebSysDescription("Control_OnPreRender")]
    public event EventHandler PreRender
    {
        add
        {
            this.Events.AddHandler(EventPreRender, value);
        }
        remove
        {
            this.Events.RemoveHandler(EventPreRender, value);
        }
    }

    [WebSysDescription("Control_OnUnload")]
    public event EventHandler Unload
    {
        add
        {
            this.Events.AddHandler(EventUnload, value);
        }
        remove
        {
            this.Events.RemoveHandler(EventUnload, value);
        }
    }

    // Methods
    public Control()
    {
        if (this is INamingContainer)
        {
            this.flags.Set(0x80);
        }
    }

    protected internal virtual void AddedControl(Control control, int index)
    {
        if (control.OwnerControl != null)
        {
            throw new InvalidOperationException(SR.GetString("Substitution_NotAllowed"));
        }
        if (control._parent != null)
        {
            control._parent.Controls.Remove(control);
        }
        control._parent = this;
        control._page = this.Page;
        control.flags.Clear(0x20000);
        Control namingContainer = this.flags[0x80] ? this : this._namingContainer;
        if (namingContainer != null)
        {
            control.UpdateNamingContainer(namingContainer);
            if ((control._id == null) && !control.flags[0x40])
            {
                control.GenerateAutomaticID();
            }
            else if ((control._id != null) || ((control._occasionalFields != null) && (control._occasionalFields.Controls != null)))
            {
                namingContainer.DirtyNameTable();
            }
        }
        if (this._controlState >= ControlState.ChildrenInitialized)
        {
            control.InitRecursive(namingContainer);
            if (((control._controlState >= ControlState.Initialized) && (control.RareFields != null)) && control.RareFields.RequiredControlState)
            {
                this.Page.RegisterRequiresControlState(control);
            }
            if (this._controlState >= ControlState.ViewStateLoaded)
            {
                object savedState = null;
                if ((this._occasionalFields != null) && (this._occasionalFields.ControlsViewState != null))
                {
                    savedState = this._occasionalFields.ControlsViewState[index];
                    if (this.LoadViewStateByID)
                    {
                        control.EnsureID();
                        savedState = this._occasionalFields.ControlsViewState[control.ID];
                        this._occasionalFields.ControlsViewState.Remove(control.ID);
                    }
                    else
                    {
                        savedState = this._occasionalFields.ControlsViewState[index];
                        this._occasionalFields.ControlsViewState.Remove(index);
                    }
                }
                control.LoadViewStateRecursive(savedState);
                if (this._controlState >= ControlState.Loaded)
                {
                    control.LoadRecursive();
                    if (this._controlState >= ControlState.PreRendered)
                    {
                        control.PreRenderRecursiveInternal();
                    }
                }
            }
        }
    }

    protected virtual void AddParsedSubObject(object obj)
    {
        Control child = obj as Control;
        if (child != null)
        {
            this.Controls.Add(child);
        }
    }

    private void ApplySkin(Page page)
    {
        if (page == null)
        {
            throw new ArgumentNullException("page");
        }
        if (!this.flags[0x400] && ThemeableAttribute.IsTypeThemeable(base.GetType()))
        {
            page.ApplyControlSkin(this);
            this.flags.Set(0x400);
        }
    }

    [EditorBrowsable(EditorBrowsableState.Advanced)]
    public virtual void ApplyStyleSheetSkin(Page page)
    {
        if (page != null)
        {
            if (this.flags[0x4000])
            {
                throw new InvalidOperationException(SR.GetString("StyleSheetAreadyAppliedOnControl"));
            }
            if (page.ApplyControlStyleSheet(this))
            {
                this.flags.Set(0x4000);
            }
        }
    }

    protected void BuildProfileTree(string parentId, bool calcViewState)
    {
        int num;
        calcViewState = calcViewState && !this.flags[4];
        if (calcViewState)
        {
            num = this.EstimateStateSize(this.SaveViewState());
        }
        else
        {
            num = 0;
        }
        int controlStateSize = 0;
        if (((this.Page != null) && (this.Page._registeredControlsRequiringControlState != null)) && this.Page._registeredControlsRequiringControlState.Contains(this))
        {
            controlStateSize = this.EstimateStateSize(this.SaveControlStateInternal());
        }
        this.Page.Trace.AddNewControl(this.UniqueID, parentId, base.GetType().FullName, num, controlStateSize);
        if ((this._occasionalFields != null) && (this._occasionalFields.Controls != null))
        {
            int count = this._occasionalFields.Controls.Count;
            for (int i = 0; i < count; i++)
            {
                this._occasionalFields.Controls[i].BuildProfileTree(this.UniqueID, calcViewState);
            }
        }
    }

    private void ClearCachedUniqueIDRecursive()
    {
        this._cachedUniqueID = null;
        if (this._occasionalFields != null)
        {
            this._occasionalFields.UniqueIDPrefix = null;
            if (this._occasionalFields.Controls != null)
            {
                int count = this._occasionalFields.Controls.Count;
                for (int i = 0; i < count; i++)
                {
                    this._occasionalFields.Controls[i].ClearCachedUniqueIDRecursive();
                }
            }
        }
    }

    protected void ClearChildControlState()
    {
        if (this.ControlState >= ControlState.Initialized)
        {
            this.flags.Set(0x40000);
            if (this.Page != null)
            {
                this.Page.RegisterRequiresClearChildControlState(this);
            }
        }
    }

    protected void ClearChildState()
    {
        this.ClearChildControlState();
        this.ClearChildViewState();
    }

    protected void ClearChildViewState()
    {
        if (this._occasionalFields != null)
        {
            this._occasionalFields.ControlsViewState = null;
        }
    }

    internal void ClearNamingContainer()
    {
        this.EnsureOccasionalFields();
        this._occasionalFields.NamedControlsID = 0;
        this.DirtyNameTable();
    }

    protected internal virtual void CreateChildControls()
    {
    }

    protected virtual ControlCollection CreateControlCollection()
    {
        return new ControlCollection(this);
    }

    public virtual void DataBind()
    {
        this.DataBind(true);
    }

    protected virtual void DataBind(bool raiseOnDataBinding)
    {
        bool flag = false;
        if (this.IsBindingContainer)
        {
            bool flag2;
            object dataItem = DataBinder.GetDataItem(this, out flag2);
            if (flag2 && (this.Page != null))
            {
                this.Page.PushDataBindingContext(dataItem);
                flag = true;
            }
        }
        try
        {
            if (raiseOnDataBinding)
            {
                this.OnDataBinding(EventArgs.Empty);
            }
            this.DataBindChildren();
        }
        finally
        {
            if (flag)
            {
                this.Page.PopDataBindingContext();
            }
        }
    }

    protected virtual void DataBindChildren()
    {
        if (this.HasControls())
        {
            this.EnsureOccasionalFields();
            string errorMsg = this._occasionalFields.Controls.SetCollectionReadOnly("Parent_collections_readonly");
            try
            {
                try
                {
                    int count = this._occasionalFields.Controls.Count;
                    for (int i = 0; i < count; i++)
                    {
                        this._occasionalFields.Controls[i].DataBind();
                    }
                }
                finally
                {
                    this._occasionalFields.Controls.SetCollectionReadOnly(errorMsg);
                }
            }
            catch
            {
                throw;
            }
        }
    }

    internal void DirtyNameTable()
    {
        if (this._occasionalFields != null)
        {
            this._occasionalFields.NamedControls = null;
        }
    }

    public virtual void Dispose()
    {
        IContainer service = null;
        if (this.Site != null)
        {
            service = (IContainer) this.Site.GetService(typeof(IContainer));
            if (service != null)
            {
                service.Remove(this);
                EventHandler handler = this.Events[EventDisposed] as EventHandler;
                if (handler != null)
                {
                    handler(this, EventArgs.Empty);
                }
            }
        }
        if (this._occasionalFields != null)
        {
            this._occasionalFields.Dispose();
        }
    }

    protected virtual void EnsureChildControls()
    {
        if (!this.ChildControlsCreated && !this.flags[0x100])
        {
            this.flags.Set(0x100);
            try
            {
                this.ResolveAdapter();
                if (this._adapter != null)
                {
                    this._adapter.CreateChildControls();
                }
                else
                {
                    this.CreateChildControls();
                }
                this.ChildControlsCreated = true;
            }
            finally
            {
                this.flags.Clear(0x100);
            }
        }
    }

    protected void EnsureID()
    {
        if (this._namingContainer != null)
        {
            if (this._id == null)
            {
                this.GenerateAutomaticID();
            }
            this.flags.Set(0x800);
        }
    }

    private void EnsureNamedControlsTable()
    {
        this._occasionalFields.NamedControls = new HybridDictionary(this._occasionalFields.NamedControlsID, true);
        this.FillNamedControlsTable(this, this._occasionalFields.Controls);
    }

    private void EnsureOccasionalFields()
    {
        if (this._occasionalFields == null)
        {
            this._occasionalFields = new OccasionalFields();
        }
    }

    internal int EstimateStateSize(object state)
    {
        if (state == null)
        {
            return 0;
        }
        return Util.SerializeWithAssert(new ObjectStateFormatter(), state).Length;
    }

    private void FillNamedControlsTable(Control namingContainer, ControlCollection controls)
    {
        int count = controls.Count;
        for (int i = 0; i < count; i++)
        {
            Control control = controls[i];
            if (control._id != null)
            {
                try
                {
                    namingContainer.EnsureOccasionalFields();
                    namingContainer._occasionalFields.NamedControls.Add(control._id, control);
                }
                catch
                {
                    throw new HttpException(SR.GetString("Duplicate_id_used", new object[] { control._id, "FindControl" }));
                }
            }
            if (control.HasControls() && !control.flags[0x80])
            {
                this.FillNamedControlsTable(namingContainer, control.Controls);
            }
        }
    }

    public virtual Control FindControl(string id)
    {
        return this.FindControl(id, 0);
    }

    protected virtual Control FindControl(string id, int pathOffset)
    {
        string str;
        this.EnsureChildControls();
        if (!this.flags[0x80])
        {
            Control namingContainer = this.NamingContainer;
            if (namingContainer != null)
            {
                return namingContainer.FindControl(id, pathOffset);
            }
            return null;
        }
        if (this.HasControls() && (this._occasionalFields.NamedControls == null))
        {
            this.EnsureNamedControlsTable();
        }
        if ((this._occasionalFields == null) || (this._occasionalFields.NamedControls == null))
        {
            return null;
        }
        char[] anyOf = new char[] { '$', ':' };
        int num = id.IndexOfAny(anyOf, pathOffset);
        if (num == -1)
        {
            str = id.Substring(pathOffset);
            return (this._occasionalFields.NamedControls[str] as Control);
        }
        str = id.Substring(pathOffset, num - pathOffset);
        Control control2 = this._occasionalFields.NamedControls[str] as Control;
        if (control2 == null)
        {
            return null;
        }
        return control2.FindControl(id, num + 1);
    }

    public virtual void Focus()
    {
        this.Page.SetFocus(this);
    }

    private void GenerateAutomaticID()
    {
        this.flags.Set(0x200000);
        this._namingContainer.EnsureOccasionalFields();
        int index = this._namingContainer._occasionalFields.NamedControlsID++;
        if (this.EnableLegacyRendering)
        {
            this._id = "_ctl" + index.ToString(NumberFormatInfo.InvariantInfo);
        }
        else if (index < 0x80)
        {
            this._id = automaticIDs[index];
        }
        else
        {
            this._id = "ctl" + index.ToString(NumberFormatInfo.InvariantInfo);
        }
        this._namingContainer.DirtyNameTable();
    }

    [SecurityPermission(SecurityAction.Demand, Unrestricted=true)]
    protected virtual IDictionary GetDesignModeState()
    {
        ControlRareFields rareFieldsEnsured = this.RareFieldsEnsured;
        if (rareFieldsEnsured.DesignModeState == null)
        {
            rareFieldsEnsured.DesignModeState = new HybridDictionary();
        }
        return rareFieldsEnsured.DesignModeState;
    }

    internal virtual TemplateControl GetTemplateControl()
    {
        if ((this._templateControl == null) && (this.Parent != null))
        {
            this._templateControl = this.Parent.GetTemplateControl();
        }
        return this._templateControl;
    }

    internal virtual string GetUniqueIDPrefix()
    {
        this.EnsureOccasionalFields();
        if (this._occasionalFields.UniqueIDPrefix == null)
        {
            string uniqueID = this.UniqueID;
            if (!string.IsNullOrEmpty(uniqueID))
            {
                this._occasionalFields.UniqueIDPrefix = uniqueID + this.IdSeparator;
            }
            else
            {
                this._occasionalFields.UniqueIDPrefix = string.Empty;
            }
        }
        return this._occasionalFields.UniqueIDPrefix;
    }

    internal XhtmlConformanceSection GetXhtmlConformanceSection()
    {
        HttpContext context = this.Context;
        if (context != null)
        {
            return RuntimeConfig.GetConfig(context).XhtmlConformance;
        }
        return RuntimeConfig.GetConfig().XhtmlConformance;
    }

    public virtual bool HasControls()
    {
        return (((this._occasionalFields != null) && (this._occasionalFields.Controls != null)) && (this._occasionalFields.Controls.Count > 0));
    }

    protected bool HasEvents()
    {
        return ((this._occasionalFields != null) && (this._occasionalFields.Events != null));
    }

    internal bool HasRenderDelegate()
    {
        return ((this.RareFields != null) && (this.RareFields.RenderMethod != null));
    }

    internal bool HasRenderingData()
    {
        if (!this.HasControls())
        {
            return this.HasRenderDelegate();
        }
        return true;
    }

    internal virtual void InitRecursive(Control namingContainer)
    {
        this.ResolveAdapter();
        if ((this._occasionalFields != null) && (this._occasionalFields.Controls != null))
        {
            if (this.flags[0x80])
            {
                namingContainer = this;
            }
            string errorMsg = this._occasionalFields.Controls.SetCollectionReadOnly("Parent_collections_readonly");
            int count = this._occasionalFields.Controls.Count;
            for (int i = 0; i < count; i++)
            {
                Control control = this._occasionalFields.Controls[i];
                control.UpdateNamingContainer(namingContainer);
                if (((control._id == null) && (namingContainer != null)) && !control.flags[0x40])
                {
                    control.GenerateAutomaticID();
                }
                control._page = this.Page;
                control.InitRecursive(namingContainer);
            }
            this._occasionalFields.Controls.SetCollectionReadOnly(errorMsg);
        }
        if (this._controlState < ControlState.Initialized)
        {
            this._controlState = ControlState.ChildrenInitialized;
            if (((this.Page != null) && !this.DesignMode) && (this.Page.ContainsTheme && this.EnableTheming))
            {
                this.ApplySkin(this.Page);
            }
            if (this._adapter != null)
            {
                this._adapter.OnInit(EventArgs.Empty);
            }
            else
            {
                this.OnInit(EventArgs.Empty);
            }
            this._controlState = ControlState.Initialized;
        }
        this.TrackViewState();
    }

    internal bool IsDescendentOf(Control ancestor)
    {
        Control parent = this;
        while ((parent != ancestor) && (parent.Parent != null))
        {
            parent = parent.Parent;
        }
        return (parent == ancestor);
    }

    protected bool IsLiteralContent()
    {
        return ((((this._occasionalFields != null) && (this._occasionalFields.Controls != null)) && (this._occasionalFields.Controls.Count == 1)) && (this._occasionalFields.Controls[0] is LiteralControl));
    }

    internal void LoadChildViewStateByID(ArrayList childState)
    {
        int count = childState.Count;
        for (int i = 0; i < count; i += 2)
        {
            string id = (string) childState[i];
            object savedState = childState[i + 1];
            Control control = this.FindControl(id);
            if (control != null)
            {
                control.LoadViewStateRecursive(savedState);
            }
            else
            {
                this.EnsureOccasionalFields();
                if (this._occasionalFields.ControlsViewState == null)
                {
                    this._occasionalFields.ControlsViewState = new Hashtable();
                }
                this._occasionalFields.ControlsViewState[id] = savedState;
            }
        }
    }

    internal void LoadChildViewStateByIndex(ArrayList childState)
    {
        ControlCollection controls = this.Controls;
        int count = controls.Count;
        int num2 = childState.Count;
        for (int i = 0; i < num2; i += 2)
        {
            int num4 = (int) childState[i];
            object savedState = childState[i + 1];
            if (num4 < count)
            {
                controls[num4].LoadViewStateRecursive(savedState);
            }
            else
            {
                this.EnsureOccasionalFields();
                if (this._occasionalFields.ControlsViewState == null)
                {
                    this._occasionalFields.ControlsViewState = new Hashtable();
                }
                this._occasionalFields.ControlsViewState[num4] = savedState;
            }
        }
    }

    protected internal virtual void LoadControlState(object savedState)
    {
    }

    internal void LoadControlStateInternal(object savedStateObj)
    {
        if (!this.flags[0x100000])
        {
            this.flags.Set(0x100000);
            Pair pair = (Pair) savedStateObj;
            if (pair != null)
            {
                Page page = this.Page;
                if ((page == null) || page.ShouldLoadControlState(this))
                {
                    if (pair.First != null)
                    {
                        this.LoadControlState(pair.First);
                    }
                    if ((this._adapter != null) && (pair.Second != null))
                    {
                        this._adapter.LoadAdapterControlState(pair.Second);
                    }
                }
            }
        }
    }

    internal virtual void LoadRecursive()
    {
        if (this._controlState < ControlState.Loaded)
        {
            if (this._adapter != null)
            {
                this._adapter.OnLoad(EventArgs.Empty);
            }
            else
            {
                this.OnLoad(EventArgs.Empty);
            }
        }
        if ((this._occasionalFields != null) && (this._occasionalFields.Controls != null))
        {
            string errorMsg = this._occasionalFields.Controls.SetCollectionReadOnly("Parent_collections_readonly");
            int count = this._occasionalFields.Controls.Count;
            for (int i = 0; i < count; i++)
            {
                this._occasionalFields.Controls[i].LoadRecursive();
            }
            this._occasionalFields.Controls.SetCollectionReadOnly(errorMsg);
        }
        if (this._controlState < ControlState.Loaded)
        {
            this._controlState = ControlState.Loaded;
        }
    }

    protected virtual void LoadViewState(object savedState)
    {
        if (savedState != null)
        {
            this.ViewState.LoadViewState(savedState);
            object obj2 = this.ViewState["Visible"];
            if (obj2 != null)
            {
                if (!((bool) obj2))
                {
                    this.flags.Set(0x10);
                }
                else
                {
                    this.flags.Clear(0x10);
                }
                this.flags.Set(0x20);
            }
        }
    }

    internal void LoadViewStateRecursive(object savedState)
    {
        if ((savedState != null) && !this.flags[4])
        {
            if ((this.Page != null) && this.Page.IsPostBack)
            {
                object first = null;
                object state = null;
                ArrayList childState = null;
                Pair pair = savedState as Pair;
                if (pair != null)
                {
                    first = pair.First;
                    childState = (ArrayList) pair.Second;
                }
                else
                {
                    Triplet triplet = (Triplet) savedState;
                    first = triplet.First;
                    state = triplet.Second;
                    childState = (ArrayList) triplet.Third;
                }
                try
                {
                    if ((state != null) && (this._adapter != null))
                    {
                        this._adapter.LoadAdapterViewState(state);
                    }
                    if (first != null)
                    {
                        this.LoadViewState(first);
                    }
                    if (childState != null)
                    {
                        if (this.LoadViewStateByID)
                        {
                            this.LoadChildViewStateByID(childState);
                        }
                        else
                        {
                            this.LoadChildViewStateByIndex(childState);
                        }
                    }
                }
                catch (InvalidCastException)
                {
                    throw new HttpException(SR.GetString("Controls_Cant_Change_Between_Posts"));
                }
                catch (IndexOutOfRangeException)
                {
                    throw new HttpException(SR.GetString("Controls_Cant_Change_Between_Posts"));
                }
            }
            this._controlState = ControlState.ViewStateLoaded;
        }
    }

    protected internal string MapPathSecure(string virtualPath)
    {
        string str;
        VirtualPath path;
        if (string.IsNullOrEmpty(virtualPath))
        {
            throw new ArgumentNullException("virtualPath", SR.GetString("VirtualPath_Length_Zero"));
        }
        this.ResolvePhysicalOrVirtualPath(virtualPath, out path, out str);
        if (str == null)
        {
            str = path.MapPathInternal(this.TemplateControlVirtualDirectory, true);
        }
        HttpRuntime.CheckFilePermission(str);
        return str;
    }

    protected virtual bool OnBubbleEvent(object source, EventArgs args)
    {
        return false;
    }

    protected virtual void OnDataBinding(EventArgs e)
    {
        if (this.HasEvents())
        {
            EventHandler handler = this._occasionalFields.Events[EventDataBinding] as EventHandler;
            if (handler != null)
            {
                handler(this, e);
            }
        }
    }

    protected internal virtual void OnInit(EventArgs e)
    {
        if (this.HasEvents())
        {
            EventHandler handler = this._occasionalFields.Events[EventInit] as EventHandler;
            if (handler != null)
            {
                handler(this, e);
            }
        }
    }

    protected internal virtual void OnLoad(EventArgs e)
    {
        if (this.HasEvents())
        {
            EventHandler handler = this._occasionalFields.Events[EventLoad] as EventHandler;
            if (handler != null)
            {
                handler(this, e);
            }
        }
    }

    protected internal virtual void OnPreRender(EventArgs e)
    {
        if (this.HasEvents())
        {
            EventHandler handler = this._occasionalFields.Events[EventPreRender] as EventHandler;
            if (handler != null)
            {
                handler(this, e);
            }
        }
    }

    protected internal virtual void OnUnload(EventArgs e)
    {
        if (this.HasEvents())
        {
            EventHandler handler = this._occasionalFields.Events[EventUnload] as EventHandler;
            if (handler != null)
            {
                handler(this, e);
            }
        }
    }

    protected internal Stream OpenFile(string path)
    {
        string physicalPath = null;
        VirtualFile file = null;
        path = path.Trim();
        if (UrlPath.IsAbsolutePhysicalPath(path))
        {
            physicalPath = path;
        }
        else
        {
            file = HostingEnvironment.VirtualPathProvider.GetFile(path);
            MapPathBasedVirtualFile file2 = file as MapPathBasedVirtualFile;
            if (file2 != null)
            {
                physicalPath = file2.PhysicalPath;
            }
        }
        if (physicalPath != null)
        {
            HttpRuntime.CheckFilePermission(physicalPath);
        }
        if (file != null)
        {
            return file.Open();
        }
        return new FileStream(physicalPath, FileMode.Open, FileAccess.Read, FileShare.Read);
    }

    internal Stream OpenFileAndGetDependency(VirtualPath virtualPath, string physicalPath, out CacheDependency dependency)
    {
        Stream stream;
        if ((physicalPath == null) && HostingEnvironment.UsingMapPathBasedVirtualPathProvider)
        {
            physicalPath = virtualPath.MapPathInternal(this.TemplateControlVirtualDirectory, true);
        }
        if (physicalPath != null)
        {
            HttpRuntime.CheckFilePermission(physicalPath);
            stream = new FileStream(physicalPath, FileMode.Open, FileAccess.Read, FileShare.Read);
            dependency = new CacheDependency(0, physicalPath);
            return stream;
        }
        stream = virtualPath.OpenFile();
        dependency = VirtualPathProvider.GetCacheDependency(virtualPath);
        return stream;
    }

    internal virtual void PreRenderRecursiveInternal()
    {
        if (!this.Visible)
        {
            this.flags.Set(0x10);
        }
        else
        {
            this.flags.Clear(0x10);
            this.EnsureChildControls();
            if (this._adapter != null)
            {
                this._adapter.OnPreRender(EventArgs.Empty);
            }
            else
            {
                this.OnPreRender(EventArgs.Empty);
            }
            if ((this._occasionalFields != null) && (this._occasionalFields.Controls != null))
            {
                string errorMsg = this._occasionalFields.Controls.SetCollectionReadOnly("Parent_collections_readonly");
                int count = this._occasionalFields.Controls.Count;
                for (int i = 0; i < count; i++)
                {
                    this._occasionalFields.Controls[i].PreRenderRecursiveInternal();
                }
                this._occasionalFields.Controls.SetCollectionReadOnly(errorMsg);
            }
        }
        this._controlState = ControlState.PreRendered;
    }

    internal void PreventAutoID()
    {
        if (!this.flags[0x80])
        {
            this.flags.Set(0x40);
        }
    }

    protected void RaiseBubbleEvent(object source, EventArgs args)
    {
        for (Control control = this.Parent; control != null; control = control.Parent)
        {
            if (control.OnBubbleEvent(source, args))
            {
                return;
            }
        }
    }

    protected internal virtual void RemovedControl(Control control)
    {
        if (control.OwnerControl != null)
        {
            throw new InvalidOperationException(SR.GetString("Substitution_NotAllowed"));
        }
        if ((this._namingContainer != null) && (control._id != null))
        {
            this._namingContainer.DirtyNameTable();
        }
        control.UnloadRecursive(false);
        control._parent = null;
        control._page = null;
        control._namingContainer = null;
        if (!(control is TemplateControl))
        {
            control._templateSourceVirtualDirectory = null;
        }
        control._templateControl = null;
        control.flags.Clear(0x800);
        control.ClearCachedUniqueIDRecursive();
    }

    protected internal virtual void Render(HtmlTextWriter writer)
    {
        this.RenderChildren(writer);
    }

    protected internal virtual void RenderChildren(HtmlTextWriter writer)
    {
        ICollection children = (this._occasionalFields == null) ? null : ((ICollection) this._occasionalFields.Controls);
        this.RenderChildrenInternal(writer, children);
    }

    internal void RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
    {
        if ((this.RareFields != null) && (this.RareFields.RenderMethod != null))
        {
            writer.BeginRender();
            this.RareFields.RenderMethod(writer, this);
            writer.EndRender();
        }
        else if (children != null)
        {
            foreach (Control control in children)
            {
                control.RenderControl(writer);
            }
        }
    }

    public virtual void RenderControl(HtmlTextWriter writer)
    {
        this.RenderControl(writer, this.Adapter);
    }

    protected void RenderControl(HtmlTextWriter writer, ControlAdapter adapter)
    {
        if (!this.flags[0x10] && !this.flags[0x200])
        {
            HttpContext context = (this.Page == null) ? null : this.Page._context;
            if ((context != null) && context.TraceIsEnabled)
            {
                int bufferedLength = context.Response.GetBufferedLength();
                this.RenderControlInternal(writer, adapter);
                int num2 = context.Response.GetBufferedLength();
                context.Trace.AddControlSize(this.UniqueID, num2 - bufferedLength);
            }
            else
            {
                this.RenderControlInternal(writer, adapter);
            }
        }
    }

    private void RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
    {
        if (adapter != null)
        {
            adapter.BeginRender(writer);
            adapter.Render(writer);
            adapter.EndRender(writer);
        }
        else
        {
            this.Render(writer);
        }
    }

    private void ResetVisible()
    {
        this.Visible = true;
    }

    protected virtual ControlAdapter ResolveAdapter()
    {
        if (!this.flags[0x8000])
        {
            if (this.DesignMode)
            {
                this.flags.Set(0x8000);
                return null;
            }
            HttpContext context = this.Context;
            if (context != null)
            {
                this._adapter = context.Request.Browser.GetAdapter(this);
            }
            this.flags.Set(0x8000);
        }
        return this._adapter;
    }

    public string ResolveClientUrl(string relativeUrl)
    {
        if ((this.DesignMode && (this.Page != null)) && (this.Page.Site != null))
        {
            IUrlResolutionService service = (IUrlResolutionService) this.Page.Site.GetService(typeof(IUrlResolutionService));
            if (service != null)
            {
                return service.ResolveClientUrl(relativeUrl);
            }
        }
        if (relativeUrl == null)
        {
            throw new ArgumentNullException("relativeUrl");
        }
        string virtualPathString = VirtualPath.GetVirtualPathString(this.TemplateControlVirtualDirectory);
        if (string.IsNullOrEmpty(virtualPathString))
        {
            return relativeUrl;
        }
        string str2 = this.Context.Request.ClientBaseDir.VirtualPathString;
        if (!UrlPath.IsAppRelativePath(relativeUrl))
        {
            if (StringUtil.EqualsIgnoreCase(str2, virtualPathString))
            {
                return relativeUrl;
            }
            if ((relativeUrl.Length == 0) || !UrlPath.IsRelativeUrl(relativeUrl))
            {
                return relativeUrl;
            }
        }
        string to = UrlPath.Combine(virtualPathString, relativeUrl);
        return HttpUtility.UrlPathEncode(UrlPath.MakeRelative(UrlPath.AppendSlashToPathIfNeeded(str2), to));
    }

    internal void ResolvePhysicalOrVirtualPath(string path, out VirtualPath virtualPath, out string physicalPath)
    {
        if (UrlPath.IsAbsolutePhysicalPath(path))
        {
            physicalPath = path;
            virtualPath = null;
        }
        else
        {
            physicalPath = null;
            virtualPath = this.TemplateControlVirtualDirectory.Combine(VirtualPath.Create(path));
        }
    }

    public string ResolveUrl(string relativeUrl)
    {
        if (relativeUrl == null)
        {
            throw new ArgumentNullException("relativeUrl");
        }
        if ((relativeUrl.Length == 0) || !UrlPath.IsRelativeUrl(relativeUrl))
        {
            return relativeUrl;
        }
        string appRelativeTemplateSourceDirectory = this.AppRelativeTemplateSourceDirectory;
        if (string.IsNullOrEmpty(appRelativeTemplateSourceDirectory))
        {
            return relativeUrl;
        }
        string virtualPath = UrlPath.Combine(appRelativeTemplateSourceDirectory, relativeUrl);
        return this.Context.Response.ApplyAppPathModifier(virtualPath);
    }

    protected internal virtual object SaveControlState()
    {
        return null;
    }

    internal object SaveControlStateInternal()
    {
        object x = this.SaveControlState();
        object y = null;
        if (this._adapter != null)
        {
            y = this._adapter.SaveAdapterControlState();
        }
        if ((x == null) && (y == null))
        {
            return null;
        }
        return new Pair(x, y);
    }

    protected virtual object SaveViewState()
    {
        if (this.flags[0x20])
        {
            this.ViewState["Visible"] = !this.flags[0x10];
        }
        if (this._viewState != null)
        {
            return this._viewState.SaveViewState();
        }
        return null;
    }

    internal object SaveViewStateRecursive()
    {
        if (!this.flags[4])
        {
            object y = null;
            if (this._adapter != null)
            {
                y = this._adapter.SaveAdapterViewState();
            }
            object x = this.SaveViewState();
            ArrayList z = null;
            if (this.HasControls())
            {
                ControlCollection controls = this._occasionalFields.Controls;
                int count = controls.Count;
                bool loadViewStateByID = this.LoadViewStateByID;
                for (int i = 0; i < count; i++)
                {
                    Control control = controls[i];
                    object obj4 = control.SaveViewStateRecursive();
                    if (obj4 != null)
                    {
                        if (z == null)
                        {
                            z = new ArrayList(count);
                        }
                        if (loadViewStateByID)
                        {
                            control.EnsureID();
                            z.Add(control.ID);
                        }
                        else
                        {
                            z.Add(i);
                        }
                        z.Add(obj4);
                    }
                }
            }
            if (this._adapter != null)
            {
                if (((x != null) || (y != null)) || (z != null))
                {
                    return new Triplet(x, y, z);
                }
            }
            else if ((x != null) || (z != null))
            {
                return new Pair(x, z);
            }
        }
        return null;
    }

    internal void SetControlBuilder(ControlBuilder controlBuilder)
    {
        this.RareFieldsEnsured.ControlBuilder = controlBuilder;
    }

    internal void SetDesignMode()
    {
        this.flags.Set(0x10000);
        this.flags.Set(0x20000);
    }

    protected virtual void SetDesignModeState(IDictionary data)
    {
    }

    internal void SetEnableViewStateInternal(bool value)
    {
        if (!value)
        {
            this.flags.Set(4);
        }
        else
        {
            this.flags.Clear(4);
        }
    }

    [EditorBrowsable(EditorBrowsableState.Advanced)]
    public void SetRenderMethodDelegate(RenderMethod renderMethod)
    {
        this.RareFieldsEnsured.RenderMethod = renderMethod;
        this.Controls.SetCollectionReadOnly("Collection_readonly_Codeblocks");
    }

    internal bool ShouldSerializeEnableTheming()
    {
        return this.flags[0x2000];
    }

    private bool ShouldSerializeVisible()
    {
        return this.flags[0x10];
    }

    IDictionary IControlDesignerAccessor.GetDesignModeState()
    {
        return this.GetDesignModeState();
    }

    void IControlDesignerAccessor.SetDesignModeState(IDictionary data)
    {
        this.SetDesignModeState(data);
    }

    void IControlDesignerAccessor.SetOwnerControl(Control owner)
    {
        if (owner == this)
        {
            throw new ArgumentException(SR.GetString("Control_CannotOwnSelf"), "owner");
        }
        this.OwnerControl = owner;
        this._parent = owner.Parent;
        this._page = owner.Page;
    }

    void IParserAccessor.AddParsedSubObject(object obj)
    {
        this.AddParsedSubObject(obj);
    }

    protected virtual void TrackViewState()
    {
        if (this._viewState != null)
        {
            this._viewState.TrackViewState();
        }
        this.flags.Set(2);
    }

    internal virtual void UnloadRecursive(bool dispose)
    {
        Page page = this.Page;
        if ((page != null) && page.RequiresControlState(this))
        {
            page.UnregisterRequiresControlState(this);
            this.RareFieldsEnsured.RequiredControlState = true;
        }
        if (this.flags[0x200000])
        {
            this._id = null;
            this.flags.Clear(0x200000);
        }
        if ((this._occasionalFields != null) && (this._occasionalFields.Controls != null))
        {
            string errorMsg = this._occasionalFields.Controls.SetCollectionReadOnly("Parent_collections_readonly");
            int count = this._occasionalFields.Controls.Count;
            for (int i = 0; i < count; i++)
            {
                this._occasionalFields.Controls[i].UnloadRecursive(dispose);
            }
            this._occasionalFields.Controls.SetCollectionReadOnly(errorMsg);
        }
        if (this._adapter != null)
        {
            this._adapter.OnUnload(EventArgs.Empty);
        }
        else
        {
            this.OnUnload(EventArgs.Empty);
        }
        if (dispose)
        {
            this.Dispose();
        }
        if (this.IsReloadable)
        {
            this._controlState = ControlState.Constructed;
        }
    }

    private void UpdateNamingContainer(Control namingContainer)
    {
        if ((this._namingContainer != null) && (this._namingContainer != namingContainer))
        {
            this.ClearCachedUniqueIDRecursive();
        }
        this._namingContainer = namingContainer;
    }

    internal void ValidateEvent(string uniqueID)
    {
        this.ValidateEvent(uniqueID, string.Empty);
    }

    internal void ValidateEvent(string uniqueID, string eventArgument)
    {
        if ((this.Page != null) && this.SupportsEventValidation)
        {
            this.Page.ClientScript.ValidateEvent(uniqueID, eventArgument);
        }
    }

    // Properties
    protected ControlAdapter Adapter
    {
        get
        {
            if (!this.flags[0x8000])
            {
                this._adapter = this.ResolveAdapter();
                this.flags.Set(0x8000);
            }
            return this._adapter;
        }
    }

    [Browsable(false), EditorBrowsable(EditorBrowsableState.Advanced), DesignerSerializationVisibility(0), WebSysDescription("Control_TemplateSourceDirectory")]
    public string AppRelativeTemplateSourceDirectory
    {
        get
        {
            return VirtualPath.GetAppRelativeVirtualPathStringOrEmpty(this.TemplateControlVirtualDirectory);
        }
        [EditorBrowsable(EditorBrowsableState.Never)]
        set
        {
            this.TemplateControlVirtualDirectory = VirtualPath.CreateNonRelativeAllowNull(value);
        }
    }

    [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(0), Bindable(false)]
    public Control BindingContainer
    {
        get
        {
            Control namingContainer = this.NamingContainer;
            while (namingContainer is INonBindingContainer)
            {
                namingContainer = namingContainer.BindingContainer;
            }
            return namingContainer;
        }
    }

    protected bool ChildControlsCreated
    {
        get
        {
            return this.flags[8];
        }
        set
        {
            if (!value && this.flags[8])
            {
                this.Controls.Clear();
            }
            if (value)
            {
                this.flags.Set(8);
            }
            else
            {
                this.flags.Clear(8);
            }
        }
    }

    [WebSysDescription("Control_ClientID"), DesignerSerializationVisibility(0), Browsable(false)]
    public virtual string ClientID
    {
        get
        {
            this.EnsureID();
            string uniqueID = this.UniqueID;
            if ((uniqueID != null) && (uniqueID.IndexOf(this.IdSeparator) >= 0))
            {
                return uniqueID.Replace(this.IdSeparator, '_');
            }
            return uniqueID;
        }
    }

    protected char ClientIDSeparator
    {
        get
        {
            return '_';
        }
    }

    [Browsable(false), DesignerSerializationVisibility(0)]
    protected internal virtual HttpContext Context
    {
        get
        {
            Page page = this.Page;
            if (page != null)
            {
                return page.Context;
            }
            return HttpContext.Current;
        }
    }

    [Browsable(false), WebSysDescription("Control_Controls"), DesignerSerializationVisibility(0)]
    public virtual ControlCollection Controls
    {
        get
        {
            if ((this._occasionalFields == null) || (this._occasionalFields.Controls == null))
            {
                this.EnsureOccasionalFields();
                this._occasionalFields.Controls = this.CreateControlCollection();
            }
            return this._occasionalFields.Controls;
        }
    }

    internal ControlState ControlState
    {
        get
        {
            return this._controlState;
        }
        set
        {
            this._controlState = value;
        }
    }

    protected internal bool DesignMode
    {
        get
        {
            if (!this.flags[0x20000])
            {
                Page page = this.Page;
                if (page != null)
                {
                    if (page.GetDesignModeInternal())
                    {
                        this.flags.Set(0x10000);
                    }
                    else
                    {
                        this.flags.Clear(0x10000);
                    }
                }
                else if (this.Site != null)
                {
                    if (this.Site.DesignMode)
                    {
                        this.flags.Set(0x10000);
                    }
                    else
                    {
                        this.flags.Clear(0x10000);
                    }
                }
                else if ((this.Parent != null) && this.Parent.DesignMode)
                {
                    this.flags.Set(0x10000);
                }
                this.flags.Set(0x20000);
            }
            return this.flags[0x10000];
        }
    }

    internal bool EnableLegacyRendering
    {
        get
        {
            Page page = this.Page;
            if (page != null)
            {
                return (page.XhtmlConformanceMode == XhtmlConformanceMode.Legacy);
            }
            return ((!this.DesignMode && (this.Adapter == null)) && (this.GetXhtmlConformanceSection().Mode == XhtmlConformanceMode.Legacy));
        }
    }

    [DefaultValue(true), Browsable(false), WebSysDescription("Control_EnableTheming"), Themeable(false), WebCategory("Behavior")]
    public virtual bool EnableTheming
    {
        get
        {
            if (!this.flags[0x2000] && (this.Parent != null))
            {
                return this.Parent.EnableTheming;
            }
            return !this.flags[0x1000];
        }
        set
        {
            if ((this._controlState >= ControlState.FrameworkInitialized) && !this.DesignMode)
            {
                throw new InvalidOperationException(SR.GetString("PropertySetBeforePreInitOrAddToControls", new object[] { "EnableTheming" }));
            }
            if (!value)
            {
                this.flags.Set(0x1000);
            }
            else
            {
                this.flags.Clear(0x1000);
            }
            this.flags.Set(0x2000);
        }
    }

    [WebSysDescription("Control_MaintainState"), Themeable(false), DefaultValue(true), WebCategory("Behavior")]
    public virtual bool EnableViewState
    {
        get
        {
            return !this.flags[4];
        }
        set
        {
            this.SetEnableViewStateInternal(value);
        }
    }

    protected EventHandlerList Events
    {
        get
        {
            this.EnsureOccasionalFields();
            if (this._occasionalFields.Events == null)
            {
                this._occasionalFields.Events = new EventHandlerList();
            }
            return this._occasionalFields.Events;
        }
    }

    protected bool HasChildViewState
    {
        get
        {
            return (((this._occasionalFields != null) && (this._occasionalFields.ControlsViewState != null)) && (this._occasionalFields.ControlsViewState.Count > 0));
        }
    }

    [Themeable(false), WebSysDescription("Control_ID"), MergableProperty(false), Filterable(false), ParenthesizePropertyName(true)]
    public virtual string ID
    {
        get
        {
            if (!this.flags[1] && !this.flags[0x800])
            {
                return null;
            }
            return this._id;
        }
        set
        {
            if ((value != null) && (value.Length == 0))
            {
                value = null;
            }
            string str = this._id;
            this._id = value;
            this.ClearCachedUniqueIDRecursive();
            this.flags.Set(1);
            this.flags.Clear(0x200000);
            if ((this._namingContainer != null) && (str != null))
            {
                this._namingContainer.DirtyNameTable();
            }
        }
    }

    protected char IdSeparator
    {
        get
        {
            if (this.Page != null)
            {
                return this.Page.IdSeparator;
            }
            return this.IdSeparatorFromConfig;
        }
    }

    internal char IdSeparatorFromConfig
    {
        get
        {
            if (!this.EnableLegacyRendering)
            {
                return '$';
            }
            return ':';
        }
    }

    internal bool IsBindingContainer
    {
        get
        {
            return ((this is INamingContainer) && !(this is INonBindingContainer));
        }
    }

    protected internal bool IsChildControlStateCleared
    {
        get
        {
            return this.flags[0x40000];
        }
    }

    internal bool IsParentedToUpdatePanel
    {
        get
        {
            for (Control control = this.Parent; control != null; control = control.Parent)
            {
                if (control is IUpdatePanel)
                {
                    return true;
                }
            }
            return false;
        }
    }

    internal virtual bool IsReloadable
    {
        get
        {
            return false;
        }
    }

    protected bool IsTrackingViewState
    {
        get
        {
            return this.flags[2];
        }
    }

    protected internal bool IsViewStateEnabled
    {
        get
        {
            for (Control control = this; control != null; control = control.Parent)
            {
                if (!control.EnableViewState)
                {
                    return false;
                }
            }
            return true;
        }
    }

    protected bool LoadViewStateByID
    {
        get
        {
            return ViewStateModeByIdAttribute.IsEnabled(base.GetType());
        }
    }

    [Browsable(false), Bindable(false), DesignerSerializationVisibility(0), WebSysDescription("Control_NamingContainer")]
    public virtual Control NamingContainer
    {
        get
        {
            if ((this._namingContainer == null) && (this.Parent != null))
            {
                if (this.Parent.flags[0x80])
                {
                    this._namingContainer = this.Parent;
                }
                else
                {
                    this._namingContainer = this.Parent.NamingContainer;
                }
            }
            return this._namingContainer;
        }
    }

    private Control OwnerControl
    {
        get
        {
            if (this.RareFields == null)
            {
                return null;
            }
            return this.RareFields.OwnerControl;
        }
        set
        {
            this.RareFieldsEnsured.OwnerControl = value;
        }
    }

    [DesignerSerializationVisibility(0), WebSysDescription("Control_Page"), Browsable(false), Bindable(false)]
    public virtual Page Page
    {
        get
        {
            if ((this._page == null) && (this.Parent != null))
            {
                this._page = this.Parent.Page;
            }
            return this._page;
        }
        set
        {
            if (this.OwnerControl != null)
            {
                throw new InvalidOperationException();
            }
            this._page = value;
        }
    }

    [Browsable(false), Bindable(false), DesignerSerializationVisibility(0), WebSysDescription("Control_Parent")]
    public virtual Control Parent
    {
        get
        {
            return this._parent;
        }
    }

    internal IPostBackDataHandler PostBackDataHandler
    {
        get
        {
            IPostBackDataHandler handler = this._adapter as IPostBackDataHandler;
            if (handler != null)
            {
                return handler;
            }
            return (this as IPostBackDataHandler);
        }
    }

    internal IPostBackEventHandler PostBackEventHandler
    {
        get
        {
            IPostBackEventHandler handler = this._adapter as IPostBackEventHandler;
            if (handler != null)
            {
                return handler;
            }
            return (this as IPostBackEventHandler);
        }
    }

    private ControlRareFields RareFields
    {
        get
        {
            if (this._occasionalFields != null)
            {
                return this._occasionalFields.RareFields;
            }
            return null;
        }
    }

    private ControlRareFields RareFieldsEnsured
    {
        get
        {
            this.EnsureOccasionalFields();
            ControlRareFields rareFields = this._occasionalFields.RareFields;
            if (rareFields == null)
            {
                rareFields = new ControlRareFields();
                this._occasionalFields.RareFields = rareFields;
            }
            return rareFields;
        }
    }

    [Browsable(false), WebSysDescription("Control_Site"), DesignerSerializationVisibility(0), EditorBrowsable(EditorBrowsableState.Advanced)]
    public ISite Site
    {
        get
        {
            if (this.OwnerControl != null)
            {
                return this.OwnerControl.Site;
            }
            if (this.RareFields != null)
            {
                return this.RareFields.Site;
            }
            return null;
        }
        set
        {
            if (this.OwnerControl != null)
            {
                throw new InvalidOperationException(SR.GetString("Substitution_SiteNotAllowed"));
            }
            this.RareFieldsEnsured.Site = value;
            this.flags.Clear(0x20000);
        }
    }

    [Browsable(false), WebSysDescription("Control_SkinId"), DefaultValue(""), Filterable(false), WebCategory("Behavior")]
    public virtual string SkinID
    {
        get
        {
            if ((this._occasionalFields != null) && (this._occasionalFields.SkinId != null))
            {
                return this._occasionalFields.SkinId;
            }
            return string.Empty;
        }
        set
        {
            if (!this.DesignMode)
            {
                if (this.flags[0x4000])
                {
                    throw new InvalidOperationException(SR.GetString("PropertySetBeforeStyleSheetApplied", new object[] { "SkinId" }));
                }
                if (this._controlState >= ControlState.FrameworkInitialized)
                {
                    throw new InvalidOperationException(SR.GetString("PropertySetBeforePreInitOrAddToControls", new object[] { "SkinId" }));
                }
            }
            this.EnsureOccasionalFields();
            this._occasionalFields.SkinId = value;
        }
    }

    internal string SpacerImageUrl
    {
        get
        {
            this.EnsureOccasionalFields();
            if (this._occasionalFields.SpacerImageUrl == null)
            {
                this._occasionalFields.SpacerImageUrl = this.Page.ClientScript.GetWebResourceUrl(typeof(WebControl), "Spacer.gif");
            }
            return this._occasionalFields.SpacerImageUrl;
        }
    }

    private bool SupportsEventValidation
    {
        get
        {
            return SupportsEventValidationAttribute.SupportsEventValidation(base.GetType());
        }
    }

    [DesignerSerializationVisibility(0), Browsable(false)]
    ControlBuilder IControlBuilderAccessor.ControlBuilder
    {
        get
        {
            if (this.RareFields == null)
            {
                return null;
            }
            return this.RareFields.ControlBuilder;
        }
    }

    IDictionary IControlDesignerAccessor.UserData
    {
        get
        {
            ControlRareFields rareFieldsEnsured = this.RareFieldsEnsured;
            if (rareFieldsEnsured.ControlDesignerAccessorUserData == null)
            {
                rareFieldsEnsured.ControlDesignerAccessorUserData = new HybridDictionary();
            }
            return rareFieldsEnsured.ControlDesignerAccessorUserData;
        }
    }

    DataBindingCollection IDataBindingsAccessor.DataBindings
    {
        get
        {
            ControlRareFields rareFieldsEnsured = this.RareFieldsEnsured;
            if (rareFieldsEnsured.DataBindings == null)
            {
                rareFieldsEnsured.DataBindings = new DataBindingCollection();
            }
            return rareFieldsEnsured.DataBindings;
        }
    }

    bool IDataBindingsAccessor.HasDataBindings
    {
        get
        {
            return (((this.RareFields != null) && (this.RareFields.DataBindings != null)) && (this.RareFields.DataBindings.Count != 0));
        }
    }

    ExpressionBindingCollection IExpressionsAccessor.Expressions
    {
        get
        {
            ExpressionBindingCollection expressionBindings = this.RareFieldsEnsured.ExpressionBindings;
            if (expressionBindings == null)
            {
                expressionBindings = new ExpressionBindingCollection();
                this.RareFields.ExpressionBindings = expressionBindings;
            }
            return expressionBindings;
        }
    }

    bool IExpressionsAccessor.HasExpressions
    {
        get
        {
            if (this.RareFields == null)
            {
                return false;
            }
            ExpressionBindingCollection expressionBindings = this.RareFields.ExpressionBindings;
            return ((expressionBindings != null) && (expressionBindings.Count > 0));
        }
    }

    [Bindable(false), DesignerSerializationVisibility(0), Browsable(false), WebSysDescription("Control_TemplateControl")]
    public TemplateControl TemplateControl
    {
        get
        {
            return this.GetTemplateControl();
        }
        [EditorBrowsable(EditorBrowsableState.Never)]
        set
        {
            this._templateControl = value;
        }
    }

    internal VirtualPath TemplateControlVirtualDirectory
    {
        get
        {
            if (this._templateSourceVirtualDirectory == null)
            {
                TemplateControl templateControl = this.TemplateControl;
                if (templateControl == null)
                {
                    HttpContext context = this.Context;
                    if (context != null)
                    {
                        this._templateSourceVirtualDirectory = context.Request.CurrentExecutionFilePathObject.Parent;
                    }
                    return this._templateSourceVirtualDirectory;
                }
                if (templateControl != this)
                {
                    this._templateSourceVirtualDirectory = templateControl.TemplateControlVirtualDirectory;
                }
            }
            return this._templateSourceVirtualDirectory;
        }
        set
        {
            this._templateSourceVirtualDirectory = value;
        }
    }

    [DesignerSerializationVisibility(0), Browsable(false), WebSysDescription("Control_TemplateSourceDirectory")]
    public virtual string TemplateSourceDirectory
    {
        get
        {
            if (this.TemplateControlVirtualDirectory == null)
            {
                return string.Empty;
            }
            return this.TemplateControlVirtualDirectory.VirtualPathStringNoTrailingSlash;
        }
    }

    [WebSysDescription("Control_UniqueID"), Browsable(false), DesignerSerializationVisibility(0)]
    public virtual string UniqueID
    {
        get
        {
            if (this._cachedUniqueID == null)
            {
                Control namingContainer = this.NamingContainer;
                if (namingContainer == null)
                {
                    return this._id;
                }
                if (this._id == null)
                {
                    this.GenerateAutomaticID();
                }
                if (this.Page == namingContainer)
                {
                    this._cachedUniqueID = this._id;
                }
                else
                {
                    string uniqueIDPrefix = namingContainer.GetUniqueIDPrefix();
                    if (uniqueIDPrefix.Length == 0)
                    {
                        return this._id;
                    }
                    this._cachedUniqueID = uniqueIDPrefix + this._id;
                }
            }
            return this._cachedUniqueID;
        }
    }

    [DesignerSerializationVisibility(0), Browsable(false), WebSysDescription("Control_State")]
    protected virtual StateBag ViewState
    {
        get
        {
            if (this._viewState == null)
            {
                this._viewState = new StateBag(this.ViewStateIgnoresCase);
                if (this.IsTrackingViewState)
                {
                    this._viewState.TrackViewState();
                }
            }
            return this._viewState;
        }
    }

    [Browsable(false), DesignerSerializationVisibility(0)]
    protected virtual bool ViewStateIgnoresCase
    {
        get
        {
            return false;
        }
    }

    [Bindable(true), WebCategory("Behavior"), DefaultValue(true), WebSysDescription("Control_Visible")]
    public virtual bool Visible
    {
        get
        {
            if (this.flags[0x10])
            {
                return false;
            }
            if ((this._parent != null) && !this.DesignMode)
            {
                return this._parent.Visible;
            }
            return true;
        }
        set
        {
            if (this.flags[2])
            {
                bool flag = !this.flags[0x10];
                if (flag != value)
                {
                    this.flags.Set(0x20);
                }
            }
            if (!value)
            {
                this.flags.Set(0x10);
            }
            else
            {
                this.flags.Clear(0x10);
            }
        }
    }

    // Nested Types
    private sealed class ControlRareFields : IDisposable
    {
        // Fields
        public ControlBuilder ControlBuilder;
        public IDictionary ControlDesignerAccessorUserData;
        public DataBindingCollection DataBindings;
        public IDictionary DesignModeState;
        public ExpressionBindingCollection ExpressionBindings;
        public Control OwnerControl;
        public RenderMethod RenderMethod;
        public bool RequiredControlState;
        public ISite Site;

        // Methods
        internal ControlRareFields()
        {
        }

        public void Dispose()
        {
            this.ControlBuilder = null;
            if (this.OwnerControl != null)
            {
                this.OwnerControl.Dispose();
            }
            this.ControlDesignerAccessorUserData = null;
            this.DesignModeState = null;
        }
    }

    private sealed class OccasionalFields : IDisposable
    {
        // Fields
        public ControlCollection Controls;
        public IDictionary ControlsViewState;
        public EventHandlerList Events;
        public IDictionary NamedControls;
        public int NamedControlsID;
        public Control.ControlRareFields RareFields;
        public string SkinId;
        public string SpacerImageUrl;
        public string UniqueIDPrefix;

        // Methods
        internal OccasionalFields()
        {
        }

        public void Dispose()
        {
            if (this.Events != null)
            {
                this.Events.Dispose();
                this.Events = null;
            }
            if (this.RareFields != null)
            {
                this.RareFields.Dispose();
            }
            this.ControlsViewState = null;
        }
    }
}

 
Collapse Methods
 

我感觉其实自定义控件自己几乎不用写多少代码，而且能从html中解脱出来，很值得学习。

 如果只是呈现的话直接从上面的几个基类集成就可以了，如果需要触发事件就要实现IPostBackEventHandler接口。

我很愚蠢的用webcontrol来实现我所谓的复合控件， 最后所有子控件的事件都无法触发，所以还是使用CompositeControl的好。