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>
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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>
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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>
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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>
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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>
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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>
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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;

   }

  }

 }
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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>
复制代码

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：。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;

  }
复制代码

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>
复制代码

效果如下：

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对编程学习网的支持。

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