DataGridCell.Template样式覆盖IsSelected触发器

Question

为什么下面的IsSelected Trigger仅在代码中没有Template Setter时才起作用？如何使两者都按预期运行？

我在Application.Resources标签中有以下内容;

<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

当您重新模板化DataGridCell时,您也会丢失实际上是绘制背景的控件的边框.添加它,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>