WPF自定义控件与样式(3)-TextBox & RichTextBox & PasswordBox样式、水印、Label标签、功能扩展

一．前言.预览

　　申明：WPF自定义控件与样式是一个系列文章，前后是有些关联的，但大多是按照由简到繁的顺序逐步发布的等，若有不明白的地方可以参考本系列前面的文章，文末附有部分文章链接。

本文主要是对文本输入控件进行样式开发，及相关扩展功能开发，主要内容包括：

• 基本文本框TextBox控件样式及扩展功能，实现了样式、水印、Label标签、功能扩展；
• 富文本框RichTextBox控件样式；
• 密码输入框PasswordBox控件样式及扩展功能；

效果图：

二．基本文本框TextBox控件样式及扩展功能

2.1 TextBox基本样式

样式代码如下：  

    <!--TextBox默认样式-->
    <Style TargetType="{x:Type TextBox}" x:Key="DefaultTextBox">
        <Setter Property="ContextMenu" Value="{DynamicResource TextBoxContextMenu}" />
        <Setter Property="SelectionBrush" Value="{StaticResource TextSelectionBrush}" />
        <Setter Property="FontFamily" Value="{StaticResource FontFamily}" />
        <Setter Property="FontSize" Value="{StaticResource FontSize}" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="MinHeight" Value="26" />
        <Setter Property="Width" Value="100" />
        <Setter Property="Background" Value="{StaticResource TextBackground}" />
        <Setter Property="Foreground" Value="{StaticResource TextForeground}" />
        <Setter Property="Padding" Value="0" />
        <Setter Property="BorderBrush" Value="{StaticResource ControlBorderBrush}" />
        <Setter Property="local:ControlAttachProperty.FocusBorderBrush" Value="{StaticResource FocusBorderBrush}" />
        <Setter Property="local:ControlAttachProperty.MouseOverBorderBrush" Value="{StaticResource MouseOverBorderBrush}" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
        <!-- change SnapsToDevicePixels to True to view a better border and validation error -->
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <!--英 ['kærət]  美 ['kærət]  插入符号-->
        <Setter Property="CaretBrush" Value="{StaticResource TextForeground}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TextBox}">
                    <Grid x:Name="PART_Root">
                        <Border x:Name="Bg" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                CornerRadius="{TemplateBinding local:ControlAttachProperty.CornerRadius}"
                                BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" />
                        <Grid x:Name="PART_InnerGrid">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition  Width="Auto" />
                                <ColumnDefinition Width="*" />
                                <ColumnDefinition  Width="Auto" />
                            </Grid.ColumnDefinitions>
                            <!--Label区域-->
                            <ContentControl x:Name="Label" Margin="1" Template="{TemplateBinding local:ControlAttachProperty.LabelTemplate}"
                                            Content="{TemplateBinding local:ControlAttachProperty.Label}"/>
                            <!--内容区域-->
                            <ScrollViewer x:Name="PART_ContentHost" BorderThickness="0" Grid.Column="1" IsTabStop="False" Margin="2"
                                          VerticalAlignment="Stretch" Background="{x:Null}" />
                            <!--水印-->
                            <TextBlock x:Name="Message"  Padding="{TemplateBinding Padding}" Visibility="Collapsed"
                                       Text="{TemplateBinding local:ControlAttachProperty.Watermark}" Grid.Column="1"
                                       Foreground="{TemplateBinding Foreground}" IsHitTestVisible="False" Opacity="{StaticResource WatermarkOpacity}"
                                       HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                       VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="5,2,5,2" />
                            <!--附加内容区域-->
                            <Border x:Name="PART_AttachContent" Grid.Column="2" Margin="2" VerticalAlignment="Center" HorizontalAlignment="Center" >
                                <ContentControl VerticalAlignment="Center" VerticalContentAlignment="Center" Template="{TemplateBinding local:ControlAttachProperty.AttachContent}" />
                            </Border>
                        </Grid>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <!--显示水印-->
                        <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Text}" Value="">
                            <Setter TargetName="Message" Property="Visibility" Value="Visible" />
                        </DataTrigger>
                        
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="BorderBrush" Value="{Binding Path=(local:ControlAttachProperty.MouseOverBorderBrush),RelativeSource={RelativeSource Self}}"/>
                        </Trigger>
                        <Trigger Property="IsFocused" Value="True">
                            <Setter  Property="BorderBrush" Value="{Binding Path=(local:ControlAttachProperty.FocusBorderBrush),RelativeSource={RelativeSource Self}}"/>
                        </Trigger>
                        <!--不可用-->
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter TargetName="PART_Root" Property="Opacity" Value="{StaticResource DisableOpacity}" />
                        </Trigger>
                        <!--只读时，禁用PART_AttachContent-->
                        <Trigger Property="IsReadOnly" Value="True">
                            <Setter TargetName="PART_AttachContent" Property="IsEnabled" Value="False" />
                            <Setter TargetName="Bg" Property="Opacity" Value="{StaticResource ReadonlyOpacity}" />
                            <Setter TargetName="PART_ContentHost" Property="Opacity" Value="{StaticResource ReadonlyOpacity}" />
                            <Setter TargetName="Label" Property="Opacity" Value="{StaticResource ReadonlyOpacity}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

　　模板内容主要包含四部分：

• 用于实现Label标签的预留区域；
• TextBox本身的文本输入显示部分；
• 水印显示部分；
• 功能扩展的预留区域；

　　其中Label标签、功能扩展，还有输入框的不同状态显示效果都是通过附加属性来实现的，其实从本质上附加属性和控件上定义的依赖属性是同一个概念，有些时候附加属性会更加方便，对于一些可共用的属性，就比较方便，这一点怎本文是有体现的。上面代码使用到的附加属性代码：

        #region FocusBorderBrush 焦点边框色，输入控件

        public static readonly DependencyProperty FocusBorderBrushProperty = DependencyProperty.RegisterAttached(
            "FocusBorderBrush", typeof(Brush), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(null));
        public static void SetFocusBorderBrush(DependencyObject element, Brush value)
        {
            element.SetValue(FocusBorderBrushProperty, value);
        }
        public static Brush GetFocusBorderBrush(DependencyObject element)
        {
            return (Brush)element.GetValue(FocusBorderBrushProperty);
        }

        #endregion

        #region MouseOverBorderBrush 鼠标进入边框色，输入控件

        public static readonly DependencyProperty MouseOverBorderBrushProperty =
            DependencyProperty.RegisterAttached("MouseOverBorderBrush", typeof(Brush), typeof(ControlAttachProperty),
                new FrameworkPropertyMetadata(Brushes.Transparent,
                    FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.Inherits));

        /// <summary>
        /// Sets the brush used to draw the mouse over brush.
        /// </summary>
        public static void SetMouseOverBorderBrush(DependencyObject obj, Brush value)
        {
            obj.SetValue(MouseOverBorderBrushProperty, value);
        }

        /// <summary>
        /// Gets the brush used to draw the mouse over brush.
        /// </summary>
        [AttachedPropertyBrowsableForType(typeof(TextBox))]
        [AttachedPropertyBrowsableForType(typeof(CheckBox))]
        [AttachedPropertyBrowsableForType(typeof(RadioButton))]
        [AttachedPropertyBrowsableForType(typeof(DatePicker))]
        [AttachedPropertyBrowsableForType(typeof(ComboBox))]
        [AttachedPropertyBrowsableForType(typeof(RichTextBox))]
        public static Brush GetMouseOverBorderBrush(DependencyObject obj)
        {
            return (Brush)obj.GetValue(MouseOverBorderBrushProperty);
        }

        #endregion

        #region AttachContentProperty 附加组件模板
        /// <summary>
        /// 附加组件模板
        /// </summary>
        public static readonly DependencyProperty AttachContentProperty = DependencyProperty.RegisterAttached(
            "AttachContent", typeof(ControlTemplate), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(null));

        public static ControlTemplate GetAttachContent(DependencyObject d)
        {
            return (ControlTemplate)d.GetValue(AttachContentProperty);
        }

        public static void SetAttachContent(DependencyObject obj, ControlTemplate value)
        {
            obj.SetValue(AttachContentProperty, value);
        }
        #endregion

        #region WatermarkProperty 水印
        /// <summary>
        /// 水印
        /// </summary>
        public static readonly DependencyProperty WatermarkProperty = DependencyProperty.RegisterAttached(
            "Watermark", typeof(string), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(""));

        public static string GetWatermark(DependencyObject d)
        {
            return (string)d.GetValue(WatermarkProperty);
        }

        public static void SetWatermark(DependencyObject obj, string value)
        {
            obj.SetValue(WatermarkProperty, value);
        }
        #endregion

        #region CornerRadiusProperty Border圆角
        /// <summary>
        /// Border圆角
        /// </summary>
        public static readonly DependencyProperty CornerRadiusProperty = DependencyProperty.RegisterAttached(
            "CornerRadius", typeof(CornerRadius), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(null));

        public static CornerRadius GetCornerRadius(DependencyObject d)
        {
            return (CornerRadius)d.GetValue(CornerRadiusProperty);
        }

        public static void SetCornerRadius(DependencyObject obj, CornerRadius value)
        {
            obj.SetValue(CornerRadiusProperty, value);
        }
        #endregion

        #region LabelProperty TextBox的头部Label
        /// <summary>
        /// TextBox的头部Label
        /// </summary>
        public static readonly DependencyProperty LabelProperty = DependencyProperty.RegisterAttached(
            "Label", typeof(string), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(null));

        [AttachedPropertyBrowsableForType(typeof(TextBox))]
        public static string GetLabel(DependencyObject d)
        {
            return (string)d.GetValue(LabelProperty);
        }

        public static void SetLabel(DependencyObject obj, string value)
        {
            obj.SetValue(LabelProperty, value);
        }
        #endregion

        #region LabelTemplateProperty TextBox的头部Label模板
        /// <summary>
        /// TextBox的头部Label模板
        /// </summary>
        public static readonly DependencyProperty LabelTemplateProperty = DependencyProperty.RegisterAttached(
            "LabelTemplate", typeof(ControlTemplate), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(null));

        [AttachedPropertyBrowsableForType(typeof(TextBox))]
        public static ControlTemplate GetLabelTemplate(DependencyObject d)
        {
            return (ControlTemplate)d.GetValue(LabelTemplateProperty);
        }

        public static void SetLabelTemplate(DependencyObject obj, ControlTemplate value)
        {
            obj.SetValue(LabelTemplateProperty, value);
        }
        #endregion

2.2 水印效果实现

　　通过2.1的代码示例，可以看出，水印是内置了一个TextBlock，用附加属性ControlAttachProperty.Watermark设置水印内容，在触发器中检测，当TextBox中有输入值，则隐藏水印的TextBlock，使用示例：  

        <StackPanel>
            <TextBox Width="140" Height="40" Margin="3" TextWrapping="Wrap" VerticalScrollBarVisibility="Visible">333333333333333</TextBox>
            <TextBox Width="150" Height="30" Margin="3" core:ControlAttachProperty.Watermark="我是水印" core:ControlAttachProperty.CornerRadius="2"></TextBox>
            <TextBox Width="150" Height="30" Margin="3" IsReadOnly="True" core:ControlAttachProperty.CornerRadius="15" SnapsToDevicePixels="True" >我是只读的</TextBox>
            <TextBox Width="150" Height="30" Margin="3" IsEnabled="False">IsEnabled="False"</TextBox>
            <TextBox Width="150" Height="30" core:ControlAttachProperty.Watermark="我是水印"></TextBox>
        </StackPanel>

　　效果：

　　

2.3 Label标签实现

　　参考2.1的代码，预留了Label的区域，通过设置附加属性local:ControlAttachProperty.Label设置标签文本，local:ControlAttachProperty.LabelTemplate设置Label标签的模板样式，即可自定义实现Label标签，自定义样式：

    <!--TextBox包含附加属性Label的样式-->
    <Style TargetType="{x:Type TextBox}" x:Key="LabelTextBox" BasedOn="{StaticResource DefaultTextBox}">
        <Setter Property="local:ControlAttachProperty.LabelTemplate" >
            <Setter.Value>
                <ControlTemplate TargetType="ContentControl">
                    <Border Width="60" Background="{StaticResource TextLabelBackground}">
                        <TextBlock VerticalAlignment="Center" HorizontalAlignment="Right" Margin="3" Text="{TemplateBinding Content}"></TextBlock>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

　　使用示例及效果： 

            <TextBox Width="200" Height="30" Margin="3" core:ControlAttachProperty.Watermark="请输入姓名" 
                         Style="{StaticResource LabelTextBox}" core:ControlAttachProperty.Label="姓名："></TextBox>

2.4 扩展功能及自定义扩展

　　思路和2.3的Label标签实现相似，清除文本框内的内容是一个常用需求，我们就线扩展一个这么一个功能的TextBox，通过附加属性ControlAttachProperty.AttachContent定义扩展功能的模板，模板内定义的是一个按钮FButton（可参考上一篇，本文末尾附录中有链接）  

    <!--TextBox包含清除Text按钮的样式-->
    <Style TargetType="{x:Type TextBox}" x:Key="ClearButtonTextBox" BasedOn="{StaticResource DefaultTextBox}">
        <Setter Property="local:ControlAttachProperty.AttachContent">
            <Setter.Value>
                <ControlTemplate>
                    <local:FButton FIcon="&#xe60a;" Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                                   local:ControlAttachProperty.IsClearTextButtonBehaviorEnabled="True" Command="local:ControlAttachProperty.ClearTextCommand" 
                                   CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"
                               Margin="1,3,1,4" FIconSize="14" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

　　这里定义的是显示效果，清除TextBox内容的逻辑代码如何实现的呢？还是附加属性：

• ControlAttachProperty.IsClearTextButtonBehaviorEnabled="True" ：注入事件到当前Button
• Command="local:ControlAttachProperty.ClearTextCommand"：定义Fbutton的命令对象实例Command
• CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"：把TextBox作为参数传入

　　逻辑代码如下，从代码不难看出，它是支持多种输入控件的内容清除的，也就是说该扩展功能可以轻松支持其他输入控件，第四节密码数据的清除也是这样使用的。

        #region IsClearTextButtonBehaviorEnabledProperty 清除输入框Text值按钮行为开关（设为ture时才会绑定事件）
        /// <summary>
        /// 清除输入框Text值按钮行为开关
        /// </summary>
        public static readonly DependencyProperty IsClearTextButtonBehaviorEnabledProperty = DependencyProperty.RegisterAttached("IsClearTextButtonBehaviorEnabled"
            , typeof(bool), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(false, IsClearTextButtonBehaviorEnabledChanged));

        [AttachedPropertyBrowsableForType(typeof(TextBox))]
        public static bool GetIsClearTextButtonBehaviorEnabled(DependencyObject d)
        {
            return (bool)d.GetValue(IsClearTextButtonBehaviorEnabledProperty);
        }

        public static void SetIsClearTextButtonBehaviorEnabled(DependencyObject obj, bool value)
        {
            obj.SetValue(IsClearTextButtonBehaviorEnabledProperty, value);
        }

        /// <summary>
        /// 绑定清除Text操作的按钮事件
        /// </summary>
        private static void IsClearTextButtonBehaviorEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var button = d as FButton;
            if (e.OldValue != e.NewValue && button != null)
            {
                button.CommandBindings.Add(ClearTextCommandBinding);
            }
        }

        #endregion

        #region ClearTextCommand 清除输入框Text事件命令

        /// <summary>
        /// 清除输入框Text事件命令，需要使用IsClearTextButtonBehaviorEnabledChanged绑定命令
        /// </summary>
        public static RoutedUICommand ClearTextCommand { get; private set; }

        /// <summary>
        /// ClearTextCommand绑定事件
        /// </summary>
        private static readonly CommandBinding ClearTextCommandBinding;

        /// <summary>
        /// 清除输入框文本值
        /// </summary>
        private static void ClearButtonClick(object sender, ExecutedRoutedEventArgs e)
        {
            var tbox = e.Parameter as FrameworkElement;
            if (tbox == null) return;
            if (tbox is TextBox)
            {
                ((TextBox)tbox).Clear();
            }
            if (tbox is PasswordBox)
            {
                ((PasswordBox)tbox).Clear();
            }
            if (tbox is ComboBox)
            {
                var cb = tbox as ComboBox;
                cb.SelectedItem = null;
                cb.Text = string.Empty;
            }
            if (tbox is MultiComboBox)
            {
                var cb = tbox as MultiComboBox;
                cb.SelectedItem = null;
                cb.UnselectAll();
                cb.Text = string.Empty;
            }
            if (tbox is DatePicker)
            {
                var dp = tbox as DatePicker;
                dp.SelectedDate = null;
                dp.Text = string.Empty;
            }
            tbox.Focus();
        }

        #endregion

        /// <summary>
        /// 静态构造函数
        /// </summary>
        static ControlAttachProperty()
        {
            //ClearTextCommand
            ClearTextCommand = new RoutedUICommand();
            ClearTextCommandBinding = new CommandBinding(ClearTextCommand);
            ClearTextCommandBinding.Executed += ClearButtonClick;
            //OpenFileCommand
            OpenFileCommand = new RoutedUICommand();
            OpenFileCommandBinding = new CommandBinding(OpenFileCommand);
            OpenFileCommandBinding.Executed += OpenFileButtonClick;
            //OpenFolderCommand
            OpenFolderCommand = new RoutedUICommand();
            OpenFolderCommandBinding = new CommandBinding(OpenFolderCommand);
            OpenFolderCommandBinding.Executed += OpenFolderButtonClick;

            SaveFileCommand = new RoutedUICommand();
            SaveFileCommandBinding = new CommandBinding(SaveFileCommand);
            SaveFileCommandBinding.Executed += SaveFileButtonClick;
        }

　　效果：

　　

当然我们也可以自定义扩展其他功能，如：  

            <TextBox Width="200" Height="30" Margin="3" core:ControlAttachProperty.Watermark="查询关键词" IsEnabled="True">
                <core:ControlAttachProperty.AttachContent>
                    <ControlTemplate>
                        <StackPanel Orientation="Horizontal">
                            <core:FButton FIcon="&#xe60b;"  Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                                            FIconSize="18" Margin="1,1,2,3" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                            <core:FButton FIcon="&#xe628;"  Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                                            FIconSize="22" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                        </StackPanel>
                    </ControlTemplate>
                </core:ControlAttachProperty.AttachContent>
            </TextBox>

　　效果：

由上不难同时实现Label标签和清除文本内容的样式：

    <!--TextBox包含附加属性Label，以及ClearText按钮的样式-->
    <Style TargetType="{x:Type TextBox}" x:Key="LabelClearButtonTextBox" BasedOn="{StaticResource DefaultTextBox}">
        <Setter Property="local:ControlAttachProperty.LabelTemplate" >
            <Setter.Value>
                <ControlTemplate TargetType="ContentControl">
                    <Border Width="60" Background="{StaticResource TextLabelBackground}">
                        <TextBlock VerticalAlignment="Center" HorizontalAlignment="Right" Margin="3" Text="{TemplateBinding Content}"></TextBlock>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="local:ControlAttachProperty.AttachContent">
            <Setter.Value>
                <ControlTemplate>
                    <local:FButton FIcon="&#xe60a;" Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                               local:ControlAttachProperty.IsClearTextButtonBehaviorEnabled="True" Command="local:ControlAttachProperty.ClearTextCommand" 
                               CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"
                               Margin="0,3,1,4" FIconSize="14" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

2.6 文件选择输入相关扩展

　　先看看效果，就明白了。

　　 

具体实现原理和上面2.4差不多 ，实现了三个文件、文件夹选择相关的功能扩展，样式代码：

    <!--LabelOpenFileTextBox-->
    <Style TargetType="{x:Type TextBox}" x:Key="LabelOpenFileTextBox" BasedOn="{StaticResource LabelClearButtonTextBox}">
        <Setter Property="local:ControlAttachProperty.Label" Value="文件路径"/>
        <Setter Property="local:ControlAttachProperty.Watermark" Value="选择文件路径"/>
        <Setter Property="local:ControlAttachProperty.AttachContent">
            <Setter.Value>
                <ControlTemplate>
                    <local:FButton FIcon="&#xe64e;" Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                               local:ControlAttachProperty.IsOpenFileButtonBehaviorEnabled="True" Command="local:ControlAttachProperty.OpenFileCommand" 
                               CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"
                               Margin="0,1,0,1"  FIconSize="22" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--LabelOpenFolderTextBox-->
    <Style TargetType="{x:Type TextBox}" x:Key="LabelOpenFolderTextBox" BasedOn="{StaticResource LabelClearButtonTextBox}">
        <Setter Property="local:ControlAttachProperty.Label" Value="设置路径"/>
        <Setter Property="local:ControlAttachProperty.Watermark" Value="选择文件夹路径"/>
        <Setter Property="local:ControlAttachProperty.AttachContent">
            <Setter.Value>
                <ControlTemplate>
                    <local:FButton FIcon="&#xe636;" Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                               local:ControlAttachProperty.IsOpenFolderButtonBehaviorEnabled="True" Command="local:ControlAttachProperty.OpenFolderCommand" 
                               CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"
                               Margin="0,1,0,1"  FIconSize="22" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--LabelSaveFileTextBox-->
    <Style TargetType="{x:Type TextBox}" x:Key="LabelSaveFileTextBox" BasedOn="{StaticResource LabelClearButtonTextBox}">
        <Setter Property="local:ControlAttachProperty.Label" Value="保存路径"/>
        <Setter Property="local:ControlAttachProperty.Watermark" Value="选择文件保存路径"/>
        <Setter Property="local:ControlAttachProperty.AttachContent">
            <Setter.Value>
                <ControlTemplate>
                    <local:FButton FIcon="&#xe61a;" Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                               local:ControlAttachProperty.IsSaveFileButtonBehaviorEnabled="True" Command="local:ControlAttachProperty.SaveFileCommand" 
                               CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"
                               Margin="0,1,0,1"  FIconSize="20" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

当然实现原理和2.4一样，都是依赖属性来实现事件的注入和绑定的，所以就不多废话了：

        #region IsOpenFileButtonBehaviorEnabledProperty 选择文件命令行为开关
        /// <summary>
        /// 选择文件命令行为开关
        /// </summary>
        public static readonly DependencyProperty IsOpenFileButtonBehaviorEnabledProperty = DependencyProperty.RegisterAttached("IsOpenFileButtonBehaviorEnabled"
            , typeof(bool), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(false, IsOpenFileButtonBehaviorEnabledChanged));

        [AttachedPropertyBrowsableForType(typeof(TextBox))]
        public static bool GetIsOpenFileButtonBehaviorEnabled(DependencyObject d)
        {
            return (bool)d.GetValue(IsOpenFileButtonBehaviorEnabledProperty);
        }

        public static void SetIsOpenFileButtonBehaviorEnabled(DependencyObject obj, bool value)
        {
            obj.SetValue(IsOpenFileButtonBehaviorEnabledProperty, value);
        }

        private static void IsOpenFileButtonBehaviorEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var button = d as FButton;
            if (e.OldValue != e.NewValue && button != null)
            {
                button.CommandBindings.Add(OpenFileCommandBinding);
            }
        }

        #endregion

        #region IsOpenFolderButtonBehaviorEnabledProperty 选择文件夹命令行为开关
        /// <summary>
        /// 选择文件夹命令行为开关
        /// </summary>
        public static readonly DependencyProperty IsOpenFolderButtonBehaviorEnabledProperty = DependencyProperty.RegisterAttached("IsOpenFolderButtonBehaviorEnabled"
            , typeof(bool), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(false, IsOpenFolderButtonBehaviorEnabledChanged));

        [AttachedPropertyBrowsableForType(typeof(TextBox))]
        public static bool GetIsOpenFolderButtonBehaviorEnabled(DependencyObject d)
        {
            return (bool)d.GetValue(IsOpenFolderButtonBehaviorEnabledProperty);
        }

        public static void SetIsOpenFolderButtonBehaviorEnabled(DependencyObject obj, bool value)
        {
            obj.SetValue(IsOpenFolderButtonBehaviorEnabledProperty, value);
        }

        private static void IsOpenFolderButtonBehaviorEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var button = d as FButton;
            if (e.OldValue != e.NewValue && button != null)
            {
                button.CommandBindings.Add(OpenFolderCommandBinding);
            }
        }

        #endregion

        #region IsSaveFileButtonBehaviorEnabledProperty 选择文件保存路径及名称
        /// <summary>
        /// 选择文件保存路径及名称
        /// </summary>
        public static readonly DependencyProperty IsSaveFileButtonBehaviorEnabledProperty = DependencyProperty.RegisterAttached("IsSaveFileButtonBehaviorEnabled"
            , typeof(bool), typeof(ControlAttachProperty), new FrameworkPropertyMetadata(false, IsSaveFileButtonBehaviorEnabledChanged));

        [AttachedPropertyBrowsableForType(typeof(TextBox))]
        public static bool GetIsSaveFileButtonBehaviorEnabled(DependencyObject d)
        {
            return (bool)d.GetValue(IsSaveFileButtonBehaviorEnabledProperty);
        }

        public static void SetIsSaveFileButtonBehaviorEnabled(DependencyObject obj, bool value)
        {
            obj.SetValue(IsSaveFileButtonBehaviorEnabledProperty, value);
        }

        private static void IsSaveFileButtonBehaviorEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var button = d as FButton;
            if (e.OldValue != e.NewValue && button != null)
            {
                button.CommandBindings.Add(SaveFileCommandBinding);
            }
        }

        #endregion

        #region OpenFileCommand 选择文件命令

        /// <summary>
        /// 选择文件命令，需要使用IsClearTextButtonBehaviorEnabledChanged绑定命令
        /// </summary>
        public static RoutedUICommand OpenFileCommand { get; private set; }

        /// <summary>
        /// OpenFileCommand绑定事件
        /// </summary>
        private static readonly CommandBinding OpenFileCommandBinding;

        /// <summary>
        /// 执行OpenFileCommand
        /// </summary>
        private static void OpenFileButtonClick(object sender, ExecutedRoutedEventArgs e)
        {
            var tbox = e.Parameter as FrameworkElement;
            var txt = tbox as TextBox;
            string filter = txt.Tag == null ? "所有文件(*.*)|*.*" : txt.Tag.ToString();
            if (filter.Contains(".bin"))
            {
                filter += "|所有文件(*.*)|*.*";
            }
            if (txt == null) return;
            OpenFileDialog fd = new OpenFileDialog();
            fd.Title = "请选择文件";
            //“图像文件(*.bmp, *.jpg)|*.bmp;*.jpg|所有文件(*.*)|*.*”
            fd.Filter = filter;
            fd.FileName = txt.Text.Trim();
            if (fd.ShowDialog() == true)
            {
                txt.Text = fd.FileName;
            }
            tbox.Focus();
        }

        #endregion

        #region OpenFolderCommand 选择文件夹命令

        /// <summary>
        /// 选择文件夹命令
        /// </summary>
        public static RoutedUICommand OpenFolderCommand { get; private set; }

        /// <summary>
        /// OpenFolderCommand绑定事件
        /// </summary>
        private static readonly CommandBinding OpenFolderCommandBinding;

        /// <summary>
        /// 执行OpenFolderCommand
        /// </summary>
        private static void OpenFolderButtonClick(object sender, ExecutedRoutedEventArgs e)
        {
            var tbox = e.Parameter as FrameworkElement;
            var txt = tbox as TextBox;
            if (txt == null) return;
            FolderBrowserDialog fd = new FolderBrowserDialog();
            fd.Description = "请选择文件路径";
            fd.SelectedPath = txt.Text.Trim();
            if (fd.ShowDialog() == DialogResult.OK)
            {
                txt.Text = fd.SelectedPath;
            }
            tbox.Focus();
        }

        #endregion

        #region SaveFileCommand 选择文件保存路径及名称

        /// <summary>
        /// 选择文件保存路径及名称
        /// </summary>
        public static RoutedUICommand SaveFileCommand { get; private set; }

        /// <summary>
        /// SaveFileCommand绑定事件
        /// </summary>
        private static readonly CommandBinding SaveFileCommandBinding;

        /// <summary>
        /// 执行OpenFileCommand
        /// </summary>
        private static void SaveFileButtonClick(object sender, ExecutedRoutedEventArgs e)
        {
            var tbox = e.Parameter as FrameworkElement;
            var txt = tbox as TextBox;
            if (txt == null) return;
            SaveFileDialog fd = new SaveFileDialog();
            fd.Title = "文件保存路径";
            fd.Filter = "所有文件(*.*)|*.*";
            fd.FileName = txt.Text.Trim();
            if (fd.ShowDialog() == DialogResult.OK)
            {
                txt.Text = fd.FileName;
            }
            tbox.Focus();
        }

        #endregion

        /// <summary>
        /// 静态构造函数
        /// </summary>
        static ControlAttachProperty()
        {
            //ClearTextCommand
            ClearTextCommand = new RoutedUICommand();
            ClearTextCommandBinding = new CommandBinding(ClearTextCommand);
            ClearTextCommandBinding.Executed += ClearButtonClick;
            //OpenFileCommand
            OpenFileCommand = new RoutedUICommand();
            OpenFileCommandBinding = new CommandBinding(OpenFileCommand);
            OpenFileCommandBinding.Executed += OpenFileButtonClick;
            //OpenFolderCommand
            OpenFolderCommand = new RoutedUICommand();
            OpenFolderCommandBinding = new CommandBinding(OpenFolderCommand);
            OpenFolderCommandBinding.Executed += OpenFolderButtonClick;

            SaveFileCommand = new RoutedUICommand();
            SaveFileCommandBinding = new CommandBinding(SaveFileCommand);
            SaveFileCommandBinding.Executed += SaveFileButtonClick;
        }

 三．富文本框RichTextBox控件样式

　　RichTextBox的样式比较简单：  

    <!--***************************DefaultRichTextBox***************************-->

    <Style x:Key="DefaultRichTextBox" TargetType="{x:Type RichTextBox}">
        <Setter Property="ContextMenu" Value="{DynamicResource TextBoxContextMenu}" />
        <Setter Property="SelectionBrush" Value="{StaticResource TextSelectionBrush}" />
        <Setter Property="FontFamily" Value="{StaticResource FontFamily}" />
        <Setter Property="FontSize" Value="{StaticResource FontSize}" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="BorderBrush" Value="{StaticResource ControlBorderBrush}" />
        <Setter Property="MinHeight" Value="26" />
        <Setter Property="MinWidth" Value="10" />
        <Setter Property="Background" Value="{StaticResource TextBackground}" />
        <Setter Property="Foreground" Value="{StaticResource TextForeground}" />
        <Setter Property="CaretBrush" Value="{StaticResource TextForeground}" />
        <Setter Property="local:ControlAttachProperty.FocusBorderBrush" Value="{StaticResource FocusBorderBrush}" />
        <Setter Property="local:ControlAttachProperty.MouseOverBorderBrush" Value="{StaticResource MouseOverBorderBrush}" />
        <Setter Property="Padding" Value="1" />
        <Setter Property="AllowDrop" Value="True" />
        <Setter Property="VerticalScrollBarVisibility" Value="Auto" />
        <Setter Property="FocusVisualStyle" Value="{x:Null}" />
        <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst" />
        <!--该值指示是否启用了笔势-->
        <Setter Property="Stylus.IsFlicksEnabled" Value="False" />
        <!--SnapsToDevicePixels:该值来确定呈现此元素是否应使用特定于设备的像素设置-->
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TextBoxBase}">
                    <Grid>
                        <Border x:Name="Bd"
                                BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"
                                Background="{TemplateBinding Background}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}">
                            <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        </Border>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="BorderBrush" Value="{Binding Path=(local:ControlAttachProperty.MouseOverBorderBrush),RelativeSource={RelativeSource Self}}"/>
                        </Trigger>
                        <Trigger Property="IsFocused" Value="True">
                            <Setter  Property="BorderBrush" Value="{Binding Path=(local:ControlAttachProperty.FocusBorderBrush),RelativeSource={RelativeSource Self}}"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter TargetName="Bd" Property="Opacity" Value="0.5" />
                        </Trigger>
                        <Trigger Property="IsReadOnly" Value="True">
                            <Setter TargetName="Bd" Property="Opacity" Value="0.85" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

　　使用实力及效果：  

四．密码输入框PasswordBox控件样式及扩展功能

　　密码输入控件的样式和第二节文本框TextBox基本一致，就不做详细的说明了，直接上样式的代码，相关逻辑（C#） 代码和上面是一样的（复用）。

    <!--TextBox默认样式-->
    <Style TargetType="{x:Type PasswordBox}" x:Key="DefaultPasswordBox">
        <Setter Property="ContextMenu" Value="{DynamicResource TextBoxContextMenu}" />
        <Setter Property="SelectionBrush" Value="{StaticResource TextSelectionBrush}" />
        <Setter Property="FontFamily" Value="{StaticResource FontFamily}" />
        <Setter Property="FontSize" Value="{StaticResource FontSize}" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="PasswordChar" Value="●"/>
        <Setter Property="Height" Value="30" />
        <Setter Property="Width" Value="200" />
        <Setter Property="Background" Value="{StaticResource TextBackground}" />
        <Setter Property="Foreground" Value="{StaticResource TextForeground}" />
        <Setter Property="Padding" Value="0" />
        <Setter Property="BorderBrush" Value="{StaticResource ControlBorderBrush}" />
        <Setter Property="local:ControlAttachProperty.FocusBorderBrush" Value="{StaticResource FocusBorderBrush}" />
        <Setter Property="local:ControlAttachProperty.MouseOverBorderBrush" Value="{StaticResource MouseOverBorderBrush}" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
        <!-- change SnapsToDevicePixels to True to view a better border and validation error -->
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <!--英 ['kærət]  美 ['kærət]  插入符号-->
        <Setter Property="CaretBrush" Value="{StaticResource TextForeground}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type PasswordBox}">
                    <Grid x:Name="PART_Root">
                        <Border x:Name="Bg" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                CornerRadius="{TemplateBinding local:ControlAttachProperty.CornerRadius}"
                                BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" />
                        <Grid x:Name="PART_InnerGrid">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition  Width="Auto" />
                                <ColumnDefinition Width="*" />
                                <ColumnDefinition  Width="Auto" />
                            </Grid.ColumnDefinitions>
                            <!--Label区域-->
                            <ContentControl x:Name="Label" Margin="1" Template="{TemplateBinding local:ControlAttachProperty.LabelTemplate}"
                                            Content="{TemplateBinding local:ControlAttachProperty.Label}"/>
                            <!--内容区域-->
                            <ScrollViewer x:Name="PART_ContentHost" BorderThickness="0" Grid.Column="1" IsTabStop="False" Margin="2"
                                          VerticalAlignment="Stretch" Background="{x:Null}" />
                            <!--附加内容区域-->
                            <Border x:Name="PART_AttachContent" Grid.Column="2" Margin="2" VerticalAlignment="Center" HorizontalAlignment="Center" >
                                <ContentControl VerticalAlignment="Center" VerticalContentAlignment="Center" Template="{TemplateBinding local:ControlAttachProperty.AttachContent}" />
                            </Border>
                        </Grid>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="BorderBrush" Value="{Binding Path=(local:ControlAttachProperty.MouseOverBorderBrush),RelativeSource={RelativeSource Self}}"/>
                        </Trigger>
                        <Trigger Property="IsFocused" Value="True">
                            <Setter  Property="BorderBrush" Value="{Binding Path=(local:ControlAttachProperty.FocusBorderBrush),RelativeSource={RelativeSource Self}}"/>
                        </Trigger>
                        <!--不可用-->
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter TargetName="PART_Root" Property="Opacity" Value="{StaticResource DisableOpacity}"></Setter>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--TextBox包含清除Text按钮的样式-->
    <Style TargetType="{x:Type PasswordBox}" x:Key="ClearButtonPasswordBox" BasedOn="{StaticResource DefaultPasswordBox}">
        <Setter Property="local:ControlAttachProperty.AttachContent">
            <Setter.Value>
                <ControlTemplate>
                    <local:FButton FIcon="&#xe60a;" Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                                   local:ControlAttachProperty.IsClearTextButtonBehaviorEnabled="True" Command="local:ControlAttachProperty.ClearTextCommand" 
                                   CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type PasswordBox}}}"
                               Margin="1,3,1,4" FIconSize="14" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--TextBox包含附加属性Label的样式-->
    <Style TargetType="{x:Type PasswordBox}" x:Key="LabelPasswordBox" BasedOn="{StaticResource DefaultPasswordBox}">
        <Setter Property="local:ControlAttachProperty.LabelTemplate" >
            <Setter.Value>
                <ControlTemplate TargetType="ContentControl">
                    <Border Width="60" Background="{StaticResource TextLabelBackground}">
                        <TextBlock VerticalAlignment="Center" HorizontalAlignment="Right" Margin="3" Text="{TemplateBinding Content}"></TextBlock>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--TextBox包含附加属性Label，以及ClearText按钮的样式-->
    <Style TargetType="{x:Type PasswordBox}" x:Key="LabelClearButtonPasswordBox" BasedOn="{StaticResource DefaultPasswordBox}">
        <Setter Property="local:ControlAttachProperty.LabelTemplate" >
            <Setter.Value>
                <ControlTemplate TargetType="ContentControl">
                    <Border Width="60" Background="{StaticResource TextLabelBackground}">
                        <TextBlock VerticalAlignment="Center" HorizontalAlignment="Right" Margin="3" Text="{TemplateBinding Content}"></TextBlock>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="local:ControlAttachProperty.AttachContent">
            <Setter.Value>
                <ControlTemplate>
                    <local:FButton FIcon="&#xe60a;" Style="{StaticResource FButton_Transparency}" IsTabStop="False" FIconMargin="0"
                               local:ControlAttachProperty.IsClearTextButtonBehaviorEnabled="True" Command="local:ControlAttachProperty.ClearTextCommand" 
                               CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type PasswordBox}}}"
                               Margin="0,3,1,4" FIconSize="14" Foreground="{StaticResource TextForeground}" Cursor="Arrow"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

使用示例及效果：  

附录.参考引用

WPF自定义控件与样式(1)-矢量字体图标(iconfont)

WPF自定义控件与样式(2)-自定义按钮FButton  

《深入浅出WPF》学习笔记二数据绑定(Binding)、依赖属性和附加属性

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