DataGridCell.Template樣式覆蓋IsSelected觸發器

Question

爲什麼IsSelected觸發器僅在代碼中缺少模板設置器時才起作用？我怎樣才能讓它們按預期運作？

我在我的Application.Resources標記中有以下內容;

<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

當您重新模板DataGridCell時，也會丟失實際上是繪製背景的控件的邊框。添加這個，它會工作。

<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>