Question

我创建的样式比将其绑定到DataGrid.RowStyle Row样式。 ContextMenu出现，我可以从菜单项中进行选择，但命令将不会执行。我用其他控件测试了命令并且工作正常。

<Style x:Key="DataGridRow"  TargetType="{x:Type DataGridRow}">
     <Setter Property="ContextMenu">
         <Setter.Value>
              <ContextMenu DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}">
                    <MenuItem Header="Add" Command="{Binding AddMessageContextMenu_Command}"/>
                    <MenuItem Header="Edit" Command="{Binding EditMessage_Command}"/>
              </ContextMenu>
           </Setter.Value>
     </Setter>
<Style>

<DataGrid Name="SearchTableDataGrid" ItemsSource="{Binding SearchTableDataGrid_ItemSource}"
   <DataGrid.RowStyle>
     <Style TargetType="{x:Type DataGridRow}">
          <Style.Triggers>
             <Trigger Property="AlternationIndex" Value="0">
                   <Setter Property="Background" Value="#FBFCFC" />
              </Trigger>
              <Trigger Property="AlternationIndex" Value="1">
                   <Setter Property="Background" Value="#f6f8f8" />
              </Trigger>
          </Style.Triggers>
      </Style>
   </DataGrid.RowStyle>
</DataGrid>

Answer 1

您需要对正确的DataContext的引用。正如评论中所建议的那样，您可以使用行Tag属性。

在获取Windows DataContext的代码下面

<Style TargetType="{x:Type DataGridRow}">
    <Setter Property="Tag" 
            Value="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, 
                            Path=DataContext}"/>
    <Setter Property="ContextMenu">
        <Setter.Value>
            <ContextMenu DataContext="{Binding PlacementTarget.Tag, 
                                               RelativeSource={RelativeSource Self}}">
                <MenuItem Header="Add" Command="{Binding AddMessageContextMenu_Command}"/>
                <MenuItem Header="Edit" Command="{Binding EditMessage_Command}"/>
            </ContextMenu>
        </Setter.Value>
    </Setter>
</Style>

DataGrid Row上的ContextMenu命令不起作用

1 个答案: