asp.net开发复合控件

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;

namespace CustomControls
{
 /// <summary>
 /// WebCustomControl1 的摘要说明。
 /// </summary>
 [DefaultProperty("Text"),
  ToolboxData("<{0}:Composite runat=server></{0}:Composite>")]
 public class Composite : Control, INamingContainer
 //标识在 Page 对象的控件层次结构内创建新 ID 命名空间的容器控件。这仅是一个标记接口。
 {
  private int number = 100;
  private Label label;
           
  public int Number
  {
   get
   {
    return number;
   }
   set
   {
    number = value;
   }
  }
           
  private int Sum
  {
   get
   {
    EnsureChildControls();
    return Int32.Parse(((TextBox)Controls[1]).Text) +
     Int32.Parse(((TextBox)Controls[4]).Text);
   }
                 
  }

  public string Text
  {
   get
   {
    EnsureChildControls();
    return label.Text;
   }
   set
   {
    EnsureChildControls();
    label.Text = value;
   }
  }
           
           
  public event CheckEventHandler Check;
           
  protected virtual void OnCheck(CheckEventArgs ce)
  {
   if (Check != null)
   {
    Check(this,ce);
   }
  }
           
  protected override void CreateChildControls()
  {
                 
   Controls.Add(new LiteralControl("<h3>第一个数字 : "));
                 
   TextBox box1 = new TextBox();
   box1.Text = "0";
   Controls.Add(box1);
                 
   Controls.Add(new LiteralControl("</h3>"));
                 
   Controls.Add(new LiteralControl("<h3>第二个数字 : "));
                 
   TextBox box2 = new TextBox();
   box2.Text = "0";
   Controls.Add(box2);
                 
   Controls.Add(new LiteralControl("</h3>"));
                 
   Button button1 = new Button();
   button1.Text = "提交";
   Controls.Add(new LiteralControl("<br>"));
   Controls.Add(button1);
   button1.Click += new EventHandler(this.ButtonClicked);
                 
   Controls.Add(new LiteralControl("<br><br>"));
   label = new Label();
   label.Height = 50;
   label.Width = 500;
   label.Text = "点击提交按钮看是否匹配";
   Controls.Add(label);
                 
  }
           
  protected override void OnPreRender(EventArgs e)
  {
   ((TextBox)Controls[1]).Text = "0";
   ((TextBox)Controls[4]).Text = "0";
  }
           
  private void ButtonClicked(Object sender, EventArgs e)
  {
   OnCheck(new CheckEventArgs(Sum - Number));
  }
 }
 public class CheckEventArgs : EventArgs
 {
  private bool match = false;
           
  public CheckEventArgs (int difference)
  {
   if (difference == 0)
   {
    match = true;
   }
  }
  public bool Match
  {
   get
   {
    return match;
   }
  }
 }
     
 public delegate void CheckEventHandler(object sender, CheckEventArgs ce);

}




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using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;

namespace CompositeEvent
{
 /// <summary>
 /// WebCustomControl1 的摘要说明。
 /// </summary>
 [DefaultProperty("Text"),
  ToolboxData("<{0}:EventBubbler runat=server></{0}:EventBubbler>")]
 public class EventBubbler : Control, INamingContainer
 {
  private int number = 100;
  private Label label;
  private TextBox box1;
  private TextBox box2;
     
  public event EventHandler Click;
  public event EventHandler Reset;
  public event EventHandler Submit;
     
  public string Label
  {
   get
   {
    EnsureChildControls();
    return label.Text;
   }
   set
   {
    EnsureChildControls();
    label.Text = value;
   }
  }
     
  public int Number
  {
   get
   {
    return number;
   }
   set
   {
    number = value;
   }
  }
     
  public string Text1
  {
   get
   {
    EnsureChildControls();
    return box1.Text;
   }
   set
   {
    EnsureChildControls();
    box1.Text = value;
   }
  }
     
  public string Text2
  {
   get
   {
    EnsureChildControls();
    return box2.Text;
   }
   set
   {
    EnsureChildControls();
    box2.Text = value;
   }
  }
     
     
  protected override void CreateChildControls()
  {
        
   Controls.Add(new LiteralControl("<h3>第一个数字 : "));
        
   box1 = new TextBox();
   box1.Text = "0";
   Controls.Add(box1);
        
   Controls.Add(new LiteralControl("</h3>"));
        
   Controls.Add(new LiteralControl("<h3>第二个数字: "));
        
   box2 = new TextBox();
   box2.Text = "0";
   Controls.Add(box2);
        
   Controls.Add(new LiteralControl("</h3>"));
        
   Button button1 = new Button();
   button1.Text = "点击";
   button1.CommandName = "Click";
   Controls.Add(button1);
        
   Button button2 = new Button();
   button2.Text = "重置";
   button2.CommandName = "Reset";
   Controls.Add(button2);
        
   Button button3 = new Button();
   button3.Text = "提交";
   button3.CommandName = "Submit";
   Controls.Add(button3);
        
   Controls.Add(new LiteralControl("<br><br>"));
   label = new Label();
   label.Height = 50;
   label.Width = 500;
   label.Text = "单击一个按钮";
   Controls.Add(label);
        
  }
     
  protected override bool OnBubbleEvent(object source, EventArgs e) //事件冒泡
  {  
   bool handled = false;
   if (e is CommandEventArgs)
   {
    CommandEventArgs ce = (CommandEventArgs)e;
    if (ce.CommandName == "Click")
    {
     OnClick(ce);
     handled = true;  
    } 
    else if (ce.CommandName == "Reset")
    {
     OnReset(ce);
     handled = true;  
    }
    else if (ce.CommandName == "Submit")
    {
     OnSubmit(ce);
     handled = true;  
    }
           
   }
   return handled;           
  }
     
  protected virtual void OnClick (EventArgs e)
  {
   if (Click != null)
   {
    Click(this,e);
   }
  }
     
  protected virtual void OnReset (EventArgs e)
  {
   if (Reset != null)
   {
    Reset(this,e);
   }
  }
     
  protected virtual void OnSubmit (EventArgs e)
  {
   if (Submit != null)
   {
    Submit(this,e);
   }
  } 
 }

}

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using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Xml;
using System.Collections;
namespace CompositeInput
{
 /// <summary>
 /// WebCustomControl1 的摘要说明。
 /// </summary>
 [DefaultProperty("Text"),
  ToolboxData("<{0}:ComInput runat=server></{0}:ComInput>")]
 public class ComInput : Control, INamingContainer
  //标识在 Page 对象的控件层次结构内创建新 ID 命名空间的容器控件。这仅是一个标记接口。
 {
  private string strFileName = "bad_words.xml";
  private Label label;
           
  public string FileName
  {
   get
   {
    return strFileName;
   }
   set
   {
    strFileName = value;
   }
  }
           
  //以用户提交的文本内容为输入参数。如果用户提交的内容包含攻击性言辞，
  //则返回修改后的版本，
  //否则，直接返回原始的文本。
  public string CheckString(string InputString)
  {
   ArrayList alWordList = new ArrayList();
   string  xmlDocPath  = this.Page.Server.MapPath("bad_words.xml");
   XmlTextReader  xmlReader = new XmlTextReader(xmlDocPath);
   string asterisks  = "*************************";
   // 将定义攻击性言辞的xml文件内容读入到一个ArrayList
   while (xmlReader.Read())
   {
    if(xmlReader.NodeType==XmlNodeType.Text)
     alWordList.Add(xmlReader.Value);
   }
   xmlReader.Close();

   //检查用户提交的文本内容，将攻击性言辞替换为适当数量的星号
   foreach(string element in alWordList)
    InputString=InputString.Replace(element,asterisks.Substring(1, (element.Length)));
   return InputString ;
  }

  public string Text
  {
   get
   {
    EnsureChildControls();
    return label.Text;
   }
   set
   {
    EnsureChildControls();
    label.Text = value;
   }
  }
           
           
  public event CheckEventHandler Check;
           
  protected virtual void OnCheck(CheckEventArgs ce)
  {
   if (Check != null)
   {
    Check(this,ce);
   }
  }
           
  protected override void CreateChildControls()
  {
   Controls.Add(new LiteralControl("<h3>请在下面输入文字内容: "));

   TextBox box1 = new TextBox();
   box1.Text = "";
   Controls.Add(box1);
                 
   Controls.Add(new LiteralControl("</h3>"));
                 
   Button button1 = new Button();
   button1.Text = "提交";
   Controls.Add(new LiteralControl("<br>"));
   Controls.Add(button1);
   button1.Click += new EventHandler(this.ButtonClicked);
                 
   Controls.Add(new LiteralControl("<br><br>"));
   label = new Label();
   label.Height = 50;
   label.Width = 500;
   label.Text = "";
   Controls.Add(label);
                 
  }
           
  protected override void OnPreRender(EventArgs e)
  {
   ((TextBox)Controls[1]).Text = "";

  }
           
  private void ButtonClicked(Object sender, EventArgs e)
  {
   OnCheck(new CheckEventArgs(((TextBox)Controls[1]).Text,CheckString(((TextBox)Controls[1]).Text)));
  }
 }
 public class CheckEventArgs : EventArgs
 {
  private bool match = false;
           
  public CheckEventArgs (string str1,string str2)
  {
   if (str1 == str2)
   {
    match = true;
   }
  }
  public bool Match
  {
   get
   {
    return match;
   }
  }
 }
     
 public delegate void CheckEventHandler(object sender, CheckEventArgs ce);
}