颜色样式文本块

Question

我有这个文本块,默认前景色是白色

 <TextBlock Text="First Cmd" Grid.Row="0" TextAlignment="Center"  Margin="4" TextWrapping="Wrap" Foreground="White" Style="{DynamicResource ABC}">
       <TextBlock.InputBindings>
                <MouseBinding  Command="{Binding AAA}" MouseAction="LeftClick" />
       </TextBlock.InputBindings>
 </TextBlock>

当鼠标位于文本块上时,forground颜色必须以黑色更改,但此样式不起作用.为什么？

<Style x:Key="ABC" TargetType="{x:Type TextBlock}">
    <Style.Triggers>
        <Trigger Property ="IsMouseOver" Value="True">
            <Setter Property= "Foreground" Value="Black">
        </Trigger>
    </Style.Triggers>
</Style>

Answer 1

您在本地设置了Foregroundfor TextBlock,因此Triggersetter无法覆盖它.您需要使用样式设置器来设置初始前景:

<Style x:Key="ABC" TargetType="{x:Type TextBlock}">
  <Setter Property="Foreground" Value="White"/>
  <Style.Triggers>
    <Trigger Property ="IsMouseOver" Value="True">
        <Setter Property= "Foreground" Value="Black">
    </Trigger>
  </Style.Triggers>
</Style>

该Foreground="White"应予以除名<TextBlock ....

了解有关依赖属性值优先级的更多信息.