WPF DataGrid AlternatingRowBackground和RowStyle优先级

问题描述

如何在 AlternatingRowBackground 之后应用我的 RowStyle ？我希望具有 IsOrange 作为 true 的项目具有 Orange

XAML：

 < DataGrid名称= g 
 AlternatingRowBackground = Blue 
 AlternationCount = 2 
 ... 
 SelectionMode = Single> 
< DataGrid.RowStyle> 
< Style TargetType = DataGridRow> 
< Style.Triggers> 
< DataTrigger Binding = {Binding IsOrange} Value = Y> 
< Setter Property = Background Value = Orange /> 
< / DataTrigger> 
< /Style.Triggers> 
< / Style> 
< /DataGrid.RowStyle> 
 ... 
< / DataGrid> 
  

解决方案

这不是错误。在样式中，您无法覆盖为交替行设置的本地值。这就是为什么这不起作用

 < DataGrid AlternatingRowBackground = Blue 
  

但是，如果您将 AlternatingRowBackground 设置为样式您可以

 < DataGrid.Style> 
< Style TargetType = DataGrid> 
< Setter Property = AlternatingRowBackground Value = Blue /> 
< / Style> 
< /DataGrid.Style> 
  

感谢。

How do I make my RowStyle to get applied after AlternatingRowBackground? I want items, having IsOrange as true to have Orange background regardless of alternating row background, which isn't the case currently.

XAML:

<DataGrid Name="g"
    AlternatingRowBackground="Blue"
    AlternationCount="2"
    ...
    SelectionMode="Single">
    <DataGrid.RowStyle>
        <Style TargetType="DataGridRow">
            <Style.Triggers>
                <DataTrigger Binding="{Binding IsOrange}" Value="Y">
                    <Setter Property="Background" Value="Orange" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </DataGrid.RowStyle>
    ...
</DataGrid>

解决方案

It's not a bug. In a Style you can't override a local value set for the alternating row. That's why this will not work

<DataGrid AlternatingRowBackground="Blue"

But if you set AlternatingRowBackground in a Style you can

<DataGrid.Style>
    <Style TargetType="DataGrid">
        <Setter Property="AlternatingRowBackground" Value="Blue"/>
    </Style>
</DataGrid.Style>

Thanks to this answer.

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