WPF如何自定义TabControl控件样式示例详解

2020-01-24 00:18:45

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一、前言

程序中经常会用到TabControl控件，默认的控件样式很普通。而且样式或功能不一定符合我们的要求。比如：我们需要TabControl的标题能够居中、或平均分布；或者我们希望TabControl的标题能够进行关闭。要实现这些功能我们需要对TabControl的样式进行定义。

二、实现TabControl的标题平均分布

默认的TabControl标题是使用TabPanel容器包含的。要想实现TabControl标题头平均分布，需要把TabPanel替换成UniformGrid；

替换后的TabControl样式如下：

<Style x:Key="TabControlStyle" TargetType="{x:Type TabControl}">  <Setter Property="Padding" Value="2"/>  <Setter Property="HorizontalContentAlignment" Value="Center"/>  <Setter Property="VerticalContentAlignment" Value="Center"/>  <Setter Property="Background" Value="White"/>  <Setter Property="BorderBrush" Value="#FFACACAC"/>  <Setter Property="BorderThickness" Value="1"/>  <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>  <Setter Property="Template">  <Setter.Value>   <ControlTemplate TargetType="{x:Type TabControl}">   <Grid x:Name="templateRoot" ClipToBounds="True" SnapsToDevicePixels="True" KeyboardNavigation.TabNavigation="Local">    <Grid.ColumnDefinitions>    <ColumnDefinition x:Name="ColumnDefinition0"/>    <ColumnDefinition x:Name="ColumnDefinition1" Width="0"/>    </Grid.ColumnDefinitions>    <Grid.RowDefinitions>    <RowDefinition x:Name="RowDefinition0" Height="Auto"/>    <RowDefinition x:Name="RowDefinition1" Height="*"/>    </Grid.RowDefinitions>    <UniformGrid x:Name="HeaderPanel" Rows="1" Background="Transparent" Grid.Column="0" IsItemsHost="True" Margin="0" Grid.Row="0" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1"/>    <Line X1="0" X2="{Binding ActualWidth, RelativeSource={RelativeSource Self}}" Stroke="White" StrokeThickness="0.1" VerticalAlignment="Bottom" Margin="0 0 0 1" SnapsToDevicePixels="True"/>    <Border x:Name="ContentPanel" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="0" KeyboardNavigation.DirectionalNavigation="Contained" Grid.Row="1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local">    <ContentPresenter x:Name="PART_SelectedContentHost" ContentTemplate="{TemplateBinding SelectedContentTemplate}" Content="{TemplateBinding SelectedContent}" ContentStringFormat="{TemplateBinding SelectedContentStringFormat}" ContentSource="SelectedContent" Margin="0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>    </Border>   </Grid>   <ControlTemplate.Triggers>    <Trigger Property="TabStripPlacement" Value="Bottom">    <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="1"/>    <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>    <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>    <Setter Property="Height" TargetName="RowDefinition1" Value="Auto"/>    </Trigger>    <Trigger Property="TabStripPlacement" Value="Left">    <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>    <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>    <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0"/>    <Setter Property="Grid.Column" TargetName="ContentPanel" Value="1"/>    <Setter Property="Width" TargetName="ColumnDefinition0" Value="Auto"/>    <Setter Property="Width" TargetName="ColumnDefinition1" Value="*"/>    <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>    <Setter Property="Height" TargetName="RowDefinition1" Value="0"/>    </Trigger>    <Trigger Property="TabStripPlacement" Value="Right">    <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>    <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>    <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="1"/>    <Setter Property="Grid.Column" TargetName="ContentPanel" Value="0"/>    <Setter Property="Width" TargetName="ColumnDefinition0" Value="*"/>    <Setter Property="Width" TargetName="ColumnDefinition1" Value="Auto"/>    <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>    <Setter Property="Height" TargetName="RowDefinition1" Value="0"/>    </Trigger>    <Trigger Property="IsEnabled" Value="False">    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>    </Trigger>   </ControlTemplate.Triggers>   </ControlTemplate>  </Setter.Value>  </Setter> </Style>

即使这样设置了，TabControl的标题还是很丑，这个时候就需要通过设置TabItem来更改标题样式了。

TabItem样式如下：

<Style x:Key="TabItemStyle" TargetType="{x:Type TabItem}">  <Setter Property="Foreground" Value="White"/>  <Setter Property="Background" Value="Transparent"/>  <Setter Property="BorderBrush" Value="#FFACACAC"/>  <Setter Property="Margin" Value="0"/>  <Setter Property="HorizontalContentAlignment" Value="Stretch"/>  <Setter Property="VerticalContentAlignment" Value="Stretch"/>  <Setter Property="Template">  <Setter.Value>   <ControlTemplate TargetType="{x:Type TabItem}">   <Grid x:Name="templateRoot" SnapsToDevicePixels="True" Background="Transparent">    <TextBlock x:Name="txt" Visibility="Visible" VerticalAlignment="Center" HorizontalAlignment="Center" Text="{TemplateBinding Header}" ToolTip="{TemplateBinding Header}" Foreground="{TemplateBinding Foreground}" TextTrimming="CharacterEllipsis" />   </Grid>   <ControlTemplate.Triggers>    <MultiDataTrigger>    <MultiDataTrigger.Conditions>     <Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource Self}}" Value="true"/>     <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>    </MultiDataTrigger.Conditions>        <Setter Property="Foreground" TargetName="txt" Value="#fffea1"/>    </MultiDataTrigger>    <MultiDataTrigger>    <MultiDataTrigger.Conditions>     <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>     <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Left"/>    </MultiDataTrigger.Conditions>    <Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>    </MultiDataTrigger>    <MultiDataTrigger>    <MultiDataTrigger.Conditions>     <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>     <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Bottom"/>    </MultiDataTrigger.Conditions>    <Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>    </MultiDataTrigger>    <MultiDataTrigger>    <MultiDataTrigger.Conditions>     <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>     <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Right"/>    </MultiDataTrigger.Conditions>    <Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>    </MultiDataTrigger>    <MultiDataTrigger>    <MultiDataTrigger.Conditions>     <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>     <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>    </MultiDataTrigger.Conditions>    <Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>    </MultiDataTrigger>    <MultiDataTrigger>    <MultiDataTrigger.Conditions>     <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="true"/>     <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>    </MultiDataTrigger.Conditions>    <Setter Property="Panel.ZIndex" Value="1"/>    <Setter Property="Foreground" TargetName="txt" Value="#fffea1"/>    </MultiDataTrigger>   </ControlTemplate.Triggers>   </ControlTemplate>  </Setter.Value>  </Setter> </Style>

至此，样式已经设置完毕，引用示例：

<Grid Background="#858586">  <TabControl Style="{StaticResource TabControlStyle}" Width="300" Height="200" Background="Transparent" BorderBrush="Transparent" BorderThickness="0">   <TabItem Style="{StaticResource TabItemStyle}" Cursor="Hand" Header="音乐电台" Height="38" >   <Grid Background="#33ffffff">    <TextBlock Text="音乐电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>   </Grid>   </TabItem>   <TabItem Style="{StaticResource TabItemStyle}" Cursor="Hand" Header="Mv电台" Height="38" >   <Grid Background="#33ffffff">    <TextBlock Text="Mv电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>   </Grid>   </TabItem>  </TabControl>  </Grid>

效果如下：

三、实现TabControl标题居中显示（不平均分布）

同理需要更改TabControl的样式和TabItem的样式。需要把使用TabPanel作为标题的容器，设置HorizontalAlignment为Center；

TabControl的样式如下：

<Style x:Key="TabControlWithUnderLineStyle" TargetType="{x:Type TabControl}"> <Setter Property="Padding" Value="2"/> <Setter Property="HorizontalContentAlignment" Value="Center"/> <Setter Property="VerticalContentAlignment" Value="Center"/> <Setter Property="Background" Value="White"/> <Setter Property="BorderBrush" Value="#FFACACAC"/> <Setter Property="BorderThickness" Value="1"/> <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/> <Setter Property="Template">  <Setter.Value>  <ControlTemplate TargetType="{x:Type TabControl}">   <Grid x:Name="templateRoot" ClipToBounds="True" SnapsToDevicePixels="True" KeyboardNavigation.TabNavigation="Local">   <Grid.ColumnDefinitions>    <ColumnDefinition x:Name="ColumnDefinition0"/>    <ColumnDefinition x:Name="ColumnDefinition1" Width="0"/>   </Grid.ColumnDefinitions>   <Grid.RowDefinitions>    <RowDefinition x:Name="RowDefinition0" Height="Auto"/>    <RowDefinition x:Name="RowDefinition1" Height="*"/>   </Grid.RowDefinitions>   <TabPanel x:Name="HeaderPanel" HorizontalAlignment="Center" Background="Transparent" Grid.Column="0" IsItemsHost="True" Margin="0" Grid.Row="0" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1"/>   <Line X1="0" X2="{Binding ActualWidth, RelativeSource={RelativeSource Self}}" Stroke="Gray" StrokeThickness="0.1" VerticalAlignment="Bottom" Margin="0 0 0 1" SnapsToDevicePixels="True"/>   <Border x:Name="ContentPanel" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="0" KeyboardNavigation.DirectionalNavigation="Contained" Grid.Row="1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local">    <ContentPresenter x:Name="PART_SelectedContentHost" ContentTemplate="{TemplateBinding SelectedContentTemplate}" Content="{TemplateBinding SelectedContent}" ContentStringFormat="{TemplateBinding SelectedContentStringFormat}" ContentSource="SelectedContent" Margin="0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>   </Border>   </Grid>   <ControlTemplate.Triggers>   <Trigger Property="TabStripPlacement" Value="Bottom">    <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="1"/>    <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>    <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>    <Setter Property="Height" TargetName="RowDefinition1" Value="Auto"/>   </Trigger>   <Trigger Property="TabStripPlacement" Value="Left">    <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>    <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>    <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0"/>    <Setter Property="Grid.Column" TargetName="ContentPanel" Value="1"/>    <Setter Property="Width" TargetName="ColumnDefinition0" Value="Auto"/>    <Setter Property="Width" TargetName="ColumnDefinition1" Value="*"/>    <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>    <Setter Property="Height" TargetName="RowDefinition1" Value="0"/>   </Trigger>   <Trigger Property="TabStripPlacement" Value="Right">    <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>    <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>    <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="1"/>    <Setter Property="Grid.Column" TargetName="ContentPanel" Value="0"/>    <Setter Property="Width" TargetName="ColumnDefinition0" Value="*"/>    <Setter Property="Width" TargetName="ColumnDefinition1" Value="Auto"/>    <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>    <Setter Property="Height" TargetName="RowDefinition1" Value="0"/>   </Trigger>   <Trigger Property="IsEnabled" Value="False">    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>   </Trigger>   </ControlTemplate.Triggers>  </ControlTemplate>  </Setter.Value> </Setter> </Style>

TabItem样式如下：

<Style x:Key="TabItemExWithUnderLineStyle" TargetType="{x:Type TabItem}">   <Setter Property="Foreground" Value="White"/>   <Setter Property="Background" Value="Transparent"/>   <Setter Property="BorderBrush" Value="#FFACACAC"/>   <Setter Property="Margin" Value="0"/>   <Setter Property="HorizontalContentAlignment" Value="Stretch"/>   <Setter Property="VerticalContentAlignment" Value="Stretch"/>   <Setter Property="Template">    <Setter.Value>     <ControlTemplate TargetType="{x:Type TabItem}">      <Grid x:Name="templateRoot" SnapsToDevicePixels="True" Background="Transparent">       <Border x:Name="_underline" BorderBrush="#37aefe" BorderThickness="0" Margin="{TemplateBinding Margin}"/>       <Grid>        <TextBlock x:Name="txt" Visibility="Visible" VerticalAlignment="Center" HorizontalAlignment="Center" Text="{TemplateBinding Header}" ToolTip="{TemplateBinding Header}" Foreground="{TemplateBinding Foreground}" TextTrimming="CharacterEllipsis" />       </Grid>      </Grid>      <ControlTemplate.Triggers>       <MultiDataTrigger>        <MultiDataTrigger.Conditions>         <Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource Self}}" Value="true"/>         <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>        </MultiDataTrigger.Conditions>        <Setter Property="Foreground" TargetName="txt" Value="#37aefe"/>       </MultiDataTrigger>       <MultiDataTrigger>        <MultiDataTrigger.Conditions>         <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>         <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Left"/>        </MultiDataTrigger.Conditions>        <Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>       </MultiDataTrigger>       <MultiDataTrigger>        <MultiDataTrigger.Conditions>         <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>         <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Bottom"/>        </MultiDataTrigger.Conditions>        <Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>       </MultiDataTrigger>       <MultiDataTrigger>        <MultiDataTrigger.Conditions>         <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>         <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Right"/>        </MultiDataTrigger.Conditions>        <Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>       </MultiDataTrigger>       <MultiDataTrigger>        <MultiDataTrigger.Conditions>         <Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>         <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>        </MultiDataTrigger.Conditions>        <Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>       </MultiDataTrigger>              <MultiDataTrigger>        <MultiDataTrigger.Conditions>         <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="true"/>         <Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>        </MultiDataTrigger.Conditions>        <Setter Property="Panel.ZIndex" Value="1"/>        <Setter Property="Foreground" TargetName="txt" Value="#37aefe"/>        <Setter Property="BorderThickness" TargetName="_underline" Value="0 0 0 2"/>       </MultiDataTrigger>      </ControlTemplate.Triggers>     </ControlTemplate>    </Setter.Value>   </Setter>  </Style>

引用示例：

<Grid Background="#858586">    <TabControl Style="{StaticResource TabControlWithUnderLineStyle}" Foreground="Black" Width="300" Height="200" Background="Transparent" BorderBrush="Transparent" BorderThickness="0">     <TabItem Style="{StaticResource TabItemExWithUnderLineStyle}" Cursor="Hand" Header="音乐电台" Height="38" Width="70" Margin="5 0">      <Grid Background="#33ffffff">       <TextBlock Text="音乐电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>      </Grid>     </TabItem>     <TabItem Style="{StaticResource TabItemExWithUnderLineStyle}" Cursor="Hand" Header="Mv电台" Height="38" Width="70" Margin="5 0">      <Grid Background="#33ffffff">       <TextBlock Text="Mv电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>      </Grid>     </TabItem>    </TabControl>   </Grid>

效果如下：

四、带关闭按钮的TabControl

带关闭按钮的TabControl其实就是就是扩展TabItem，需要新建WPF自定义控件，命名为TabItemClose吧；

C#代码如下：

public class TabItemClose : TabItem {  static TabItemClose()  {   DefaultStyleKeyProperty.OverrideMetadata(typeof(TabItemClose), new FrameworkPropertyMetadata(typeof(TabItemClose)));  }  private static void OnPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)  {   d.SetValue(e.Property, e.NewValue);  }  /// <summary>  /// 是否可以关闭  /// </summary>  public bool IsCanClose  {   get { return (bool)GetValue(IsCanCloseProperty); }   set { SetValue(IsCanCloseProperty, value); }  }  public static readonly DependencyProperty IsCanCloseProperty =   DependencyProperty.Register("IsCanClose", typeof(bool), typeof(TabItemClose), new PropertyMetadata(true, OnPropertyChanged));  /// <summary>  /// 关闭的图标  /// </summary>  public ImageSource CloseIcon  {   get { return (ImageSource)GetValue(CloseIconProperty); }   set { SetValue(CloseIconProperty, value); }  }  public static readonly DependencyProperty CloseIconProperty =   DependencyProperty.Register("CloseIcon", typeof(ImageSource), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));  /// <summary>  /// 正常背景色  /// </summary>  public SolidColorBrush NormalBackground  {   get { return (SolidColorBrush)GetValue(NormalBackgroundProperty); }   set { SetValue(NormalBackgroundProperty, value); }  }  public static readonly DependencyProperty NormalBackgroundProperty =   DependencyProperty.Register("NormalBackground", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));  /// <summary>  /// 悬浮背景色  /// </summary>  public SolidColorBrush OverBackgound  {   get { return (SolidColorBrush)GetValue(OverBackgoundProperty); }   set { SetValue(OverBackgoundProperty, value); }  }  public static readonly DependencyProperty OverBackgoundProperty =   DependencyProperty.Register("OverBackgound", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));  /// <summary>  /// 选中背景色  /// </summary>  public SolidColorBrush SelectedBackgound  {   get { return (SolidColorBrush)GetValue(SelectedBackgoundProperty); }   set { SetValue(SelectedBackgoundProperty, value); }  }  public static readonly DependencyProperty SelectedBackgoundProperty =   DependencyProperty.Register("SelectedBackgound", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));  /// <summary>  /// 默认前景色  /// </summary>  public SolidColorBrush NormalForeground  {   get { return (SolidColorBrush)GetValue(NormalForegroundProperty); }   set { SetValue(NormalForegroundProperty, value); }  }  public static readonly DependencyProperty NormalForegroundProperty =   DependencyProperty.Register("NormalForeground", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));  /// <summary>  /// 悬浮前景色  /// </summary>  public SolidColorBrush OverForeground  {   get { return (SolidColorBrush)GetValue(OverForegroundProperty); }   set { SetValue(OverForegroundProperty, value); }  }  public static readonly DependencyProperty OverForegroundProperty =   DependencyProperty.Register("OverForeground", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));  /// <summary>  /// 选中前景色  /// </summary>  public SolidColorBrush SelectedForeground  {   get { return (SolidColorBrush)GetValue(SelectedForegroundProperty); }   set { SetValue(SelectedForegroundProperty, value); }  }  public static readonly DependencyProperty SelectedForegroundProperty =   DependencyProperty.Register("SelectedForeground", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));  /// <summary>  /// 控件圆角  /// </summary>  public CornerRadius CornerRadius  {   get { return (CornerRadius)GetValue(CornerRadiusProperty); }   set { SetValue(CornerRadiusProperty, value); }  }  public static readonly DependencyProperty CornerRadiusProperty =   DependencyProperty.Register("CornerRadius", typeof(CornerRadius), typeof(TabItemClose), new PropertyMetadata(new CornerRadius(0), OnPropertyChanged));  /// <summary>  /// 前置Logo  /// </summary>  public ImageSource LogoIcon  {   get { return (ImageSource)GetValue(LogoIconProperty); }   set { SetValue(LogoIconProperty, value); }  }  public static readonly DependencyProperty LogoIconProperty =   DependencyProperty.Register("LogoIcon", typeof(ImageSource), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));  /// <summary>  /// 前置Logo宽度  /// </summary>  public double LogoIconWidth  {   get { return (double)GetValue(LogoIconWidthProperty); }   set { SetValue(LogoIconWidthProperty, value); }  }  public static readonly DependencyProperty LogoIconWidthProperty =   DependencyProperty.Register("LogoIconWidth", typeof(double), typeof(TabItemClose), new PropertyMetadata(double.Parse("0"), OnPropertyChanged));  /// <summary>  /// 前置Logo高度  /// </summary>  public double LogoIconHeigth  {   get { return (double)GetValue(LogoIconHeigthProperty); }   set { SetValue(LogoIconHeigthProperty, value); }  }  public static readonly DependencyProperty LogoIconHeigthProperty =   DependencyProperty.Register("LogoIconHeigth", typeof(double), typeof(TabItemClose), new PropertyMetadata(double.Parse("0"), OnPropertyChanged));  /// <summary>  /// LogoPadding  /// </summary>  public Thickness LogoPadding  {   get { return (Thickness)GetValue(LogoPaddingProperty); }   set { SetValue(LogoPaddingProperty, value); }  }  public static readonly DependencyProperty LogoPaddingProperty =   DependencyProperty.Register("LogoPadding", typeof(Thickness), typeof(TabItemClose), new PropertyMetadata(new Thickness(0), OnPropertyChanged));  /// <summary>  /// 关闭item事件  /// </summary>  public event RoutedEventHandler CloseItem  {   add { AddHandler(CloseItemEvent, value); }   remove { RemoveHandler(CloseItemEvent, value); }  }  public static readonly RoutedEvent CloseItemEvent =   EventManager.RegisterRoutedEvent("CloseItem", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(TabItemClose));  /// <summary>  /// 关闭项的右键菜单  /// </summary>  public ContextMenu ItemContextMenu { get; set; }  Border ItemBorder;  public override void OnApplyTemplate()  {   base.OnApplyTemplate();   ItemBorder = Template.FindName("_bordertop", this) as Border;   if (ItemContextMenu != null)   {    ItemBorder.ContextMenu = ItemContextMenu;   }  } }

这里面我们添加了很多扩展功能，包括右键菜单，图标显示和控件圆角，以及各种背景色属性。

然后为TabItemClose设置样式

<Style TargetType="{x:Type local:TabItemClose}">  <Setter Property="HorizontalContentAlignment" Value="Stretch"/>  <Setter Property="VerticalContentAlignment" Value="Stretch"/>  <Setter Property="Foreground" Value="#666666"/>  <Setter Property="Margin" Value="0 0 0 0"/>  <Setter Property="Padding" Value="0"/>  <Setter Property="BorderThickness" Value="0"/>  <Setter Property="CloseIcon" Value="/Images/close2.png"/>  <Setter Property="NormalBackground" Value="White"/>  <Setter Property="OverBackgound" Value="#33ca5100"/>  <Setter Property="SelectedBackgound" Value="#ca5100"/>  <Setter Property="NormalForeground" Value="#555558"/>  <Setter Property="OverForeground" Value="White"/>  <Setter Property="SelectedForeground" Value="White"/>  <Setter Property="Template">   <Setter.Value>    <ControlTemplate TargetType="{x:Type local:TabItemClose}">     <Border x:Name="_bordertop" Width="{TemplateBinding Width}" MaxWidth="{TemplateBinding MaxWidth}" Height="{TemplateBinding Height}" CornerRadius="{TemplateBinding CornerRadius}" Background="{TemplateBinding NormalBackground}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" ToolTip="{TemplateBinding Header}" >      <DockPanel>       <Image x:Name="_logo" DockPanel.Dock="Left" Visibility="Visible" Margin="{TemplateBinding LogoPadding}" Source="{TemplateBinding LogoIcon}" VerticalAlignment="Center" HorizontalAlignment="Center" Stretch="Uniform" Width="{TemplateBinding LogoIconWidth}" Height="{TemplateBinding LogoIconHeigth}" />       <Grid Name="_grid" SnapsToDevicePixels="True">        <Grid.ColumnDefinitions>         <ColumnDefinition Width="*" />         <ColumnDefinition x:Name="_col_close" Width="20" />        </Grid.ColumnDefinitions>        <Border Grid.ColumnSpan="2" Background="White" Opacity="0"/>        <TextBlock x:Name="_txt" VerticalAlignment="Center" TextTrimming="CharacterEllipsis" Margin="3 0 3 0" Foreground="{TemplateBinding NormalForeground}" TextAlignment="Center" HorizontalAlignment="Center" Text="{TemplateBinding Header}" />        <Grid x:Name="_gridclose" Grid.Column="1" >         <Border x:Name="_borderbg" Background="Black" Opacity="0" />         <local:ButtonEx x:Name="PART_Close_TabItem" HorizontalAlignment="Center" VerticalAlignment="Center" Background="Transparent" Visibility="Visible" Icon="{TemplateBinding CloseIcon}" ButtonType="Icon" />        </Grid>       </Grid>      </DockPanel>     </Border>     <ControlTemplate.Triggers>      <Trigger Property="LogoIcon" Value="{x:Null}">       <Setter TargetName="_logo" Property="Visibility" Value="Collapsed" />      </Trigger>      <Trigger Property="IsCanClose" Value="false">       <Setter TargetName="_gridclose" Property="Visibility" Value="Collapsed"/>       <Setter TargetName="_col_close" Property="Width" Value="0"/>      </Trigger>      <Trigger Property="IsSelected" Value="true">       <Setter TargetName="_bordertop" Property="Background" Value="{Binding SelectedBackgound,RelativeSource={RelativeSource TemplatedParent}}" />       <Setter TargetName="_txt" Property="Foreground" Value="{Binding SelectedForeground,RelativeSource={RelativeSource TemplatedParent}}"/>      </Trigger>      <MultiTrigger>       <MultiTrigger.Conditions>        <Condition Property="IsMouseOver" Value="true"/>        <Condition Property="IsSelected" Value="false"/>       </MultiTrigger.Conditions>       <Setter TargetName="_txt" Property="Foreground" Value="{Binding OverForeground,RelativeSource={RelativeSource TemplatedParent}}"/>       <Setter TargetName="_bordertop" Property="Background" Value="{Binding OverBackgound,RelativeSource={RelativeSource TemplatedParent}}"/>      </MultiTrigger>     </ControlTemplate.Triggers>    </ControlTemplate>   </Setter.Value>  </Setter> </Style>

这里面使用了一个close的图标

TabControl的图标可设置可不设置，看自己需要。

这里面还用到了前面讲的控件ButtonEx，定义方法我就不重复赘述了。大家可以通过这个链接跳转查看：//www.VeVB.COm/article/138475.htm。ButtonEx.cs里面还要添加几个方法用来支持关闭TabItem：

protected override void OnClick()  {   base.OnClick();   if (!string.IsNullOrEmpty(Name) && Name == "PART_Close_TabItem")   {    TabItemClose itemclose = FindVisualParent<TabItemClose>(this);    (itemclose.Parent as TabControl).Items.Remove(itemclose);    RoutedEventArgs args = new RoutedEventArgs(TabItemClose.CloseItemEvent, itemclose);    itemclose.RaiseEvent(args);   }  }  public static T FindVisualParent<T>(DependencyObject obj) where T : class  {   while (obj != null)   {    if (obj is T)     return obj as T;    obj = VisualTreeHelper.GetParent(obj);   }   return null;  }

引用示例：

<Grid Background="#858586">    <TabControl Foreground="Black" Width="300" Height="200" Background="Transparent" BorderBrush="Transparent" BorderThickness="0">     <local:TabItemClose Cursor="Hand" Header="音乐电台" Height="20" Width="100">      <Grid Background="#aaffffff">       <TextBlock Text="音乐电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>      </Grid>     </local:TabItemClose>     <local:TabItemClose Cursor="Hand" Header="Mv电台" Height="20" Width="100">      <Grid Background="#aaffffff">       <TextBlock Text="Mv电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>      </Grid>     </local:TabItemClose>    </TabControl>   </Grid>

效果如下：