wpf 更改 TabControl 中所选 tabItem 的文本颜色？
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Changing the text color of the selected tabItem in a TabControl?
提问by hafhadg3
In the second code there is a textBlock with the text "Mina ?vningar" How can I change the text color to black when the tabItem is selected?
在第二个代码中有一个带有文本“Mina ?vningar”的 textBlock 选择 tabItem 时如何将文本颜色更改为黑色？
style:
风格：
<Style TargetType="{x:Type TabItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid>
<Border Name="Border" Background="Transparent" BorderBrush="Transparent" BorderThickness="0" Margin="0,0,0,13" CornerRadius="5" >
<ContentPresenter x:Name="ContentSite" VerticalAlignment="Top" HorizontalAlignment="Center" ContentSource="Header" Margin="9"/>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Foreground" Value="Black"/>
<Setter TargetName="Border" Property="Background">
<Setter.Value>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFF9F7FD" Offset="0.432" />
<GradientStop Color="#FFECF7FD" Offset="0.433" />
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter TargetName="ContentSite" Property="Margin" Value="9,12,9,9" />
</Trigger>
<Trigger Property="IsSelected" Value="False">
<Setter TargetName="Border" Property="Background" Value="Transparent" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
tabitem:
标签：
<TabItem Background="White">
<TabItem.Header>
<StackPanel Orientation="Vertical">
<Image Height="32" Source="/Glosboken;component/Images/library bookmarked.png" />
<TextBlock Text="Mina ?vningar" Margin="0,0,0,0" VerticalAlignment="Center" Foreground="White" />
</StackPanel>
</TabItem.Header>
<Grid>
<ListBox Height="216" Name="bookslist" VerticalAlignment="Top" Background="White" BorderBrush="White" Foreground="White" SelectedIndex="0" Margin="0,0,129,0" />
</Grid>
</TabItem>
回答by Rick Sladkey
One solution is to use a separate style for this situation:
一种解决方案是针对这种情况使用单独的样式：
<Style x:Key="TabItemText" TargetType="{x:Type TextBlock}">
<Style.Triggers>
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=TabItem}}" Value="True">
<Setter Property="Foreground" Value="Black"/>
</DataTrigger>
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=TabItem}}" Value="False">
<Setter Property="Foreground" Value="White"/>
</DataTrigger>
</Style.Triggers>
</Style>
and then replace:
然后替换：
Foreground="White"
with:
和：
Style="{StaticResource TabItemText}"
in the TextBlock.
在文本块中。
回答by Scott Solmer
I did this by naming the ContentPresenter and targeting it in the trigger. This way it keeps everything for the TabItem style in one place.
我通过命名 ContentPresenter 并在触发器中定位它来做到这一点。这样，它将 TabItem 样式的所有内容都保存在一个地方。
Complete Example:
完整示例：
<Window x:Class="TabControlText.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<Style x:Key="TabItemStyle1" TargetType="{x:Type TabItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Border x:Name="Border" BorderThickness="1,1,1,0" CornerRadius="5,5,0,0"
Padding="25,5,25,5" Margin="0,0,0,0" BorderBrush="Gainsboro">
<ContentPresenter x:Name="ContentSite" ContentSource="Header" />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="TextElement.Foreground" TargetName="ContentSite" Value="White"/>
<Setter TargetName="Border" Property="Background" Value="Black"/>
</Trigger>
<Trigger Property="IsSelected" Value="False">
<Setter Property="TextElement.Foreground" TargetName="ContentSite" Value="Black"/>
<Setter TargetName="Border" Property="Background" Value="White" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid>
<TabControl>
<TabItem Header="Tab 1" Style="{DynamicResource TabItemStyle1}" />
<TabItem Header="Tab 2" Style="{DynamicResource TabItemStyle1}" />
<TabItem Header="Tab 3" Style="{DynamicResource TabItemStyle1}" />
<TabItem Header="Tab 4" Style="{DynamicResource TabItemStyle1}" />
</TabControl>
</Grid>
