DataGridCell.Template样式覆盖IsSelected触发器

Question

为什么IsSelected触发器仅在代码中缺少模板设置器时才起作用？我怎样才能让它们按预期运作？

我在我的Application.Resources标记中有以下内容;

<Style TargetType="{x:Type DataGridCell}"> 
    <Style.Triggers> 
     <Trigger Property="IsSelected" Value="True"> 
      <Setter Property="Background" Value="Red"/> 
     </Trigger> 
    </Style.Triggers> 

    <Setter Property="Template"> 
     <Setter.Value> 
      <ControlTemplate TargetType="{x:Type DataGridCell}"> 
       <ContentPresenter VerticalAlignment="Center"></ContentPresenter> 
      </ControlTemplate> 
     </Setter.Value> 
    </Setter> 
</Style> 

Answer 1

当您重新模板DataGridCell时，也会丢失实际上是绘制背景的控件的边框。添加这个，它会工作。

<Style TargetType="{x:Type DataGridCell}"> 
    <Style.Triggers> 
     <Trigger Property="IsSelected" Value="True"> 
      <Setter Property="Background" Value="Red"/> 
     </Trigger> 
    </Style.Triggers> 
    <Setter Property="Template"> 
     <Setter.Value> 
      <ControlTemplate TargetType="{x:Type DataGridCell}"> 
       <Border Background="{TemplateBinding Background}"> 
        <ContentPresenter VerticalAlignment="Center"></ContentPresenter> 
       </Border> 
      </ControlTemplate> 
     </Setter.Value> 
    </Setter> 
</Style>