从 ItemTemplate 内部绑定到 ItemsControl 的 DataContext
我有一个 ItemsControl，其 ItemTemplate DataTemplate 包含一个按钮。我希望按钮上的命令绑定到 ItemsControl 的 DataContext 上的命令，而不是 ItemTemplate。我认为解决方案与使用relativesource有关，但到目前为止我的尝试都失败了：
<ItemsControl ItemsSource="{Binding Games}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button Command="{Binding Path=GameSelectedCommand, Source={RelativeSource FindAncestor, AncestorType={x:Type ItemsControl}}}"
CommandParameter="{Binding}"
Style="{StaticResource MenuButtonStyle}"
Content="{Binding Name}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
How can I get the Button to bind to the GameSelectedCommand of the ItemsControl's DataContext object?
I have an ItemsControl whose for the ItemTemplate DataTemplate contains a Button. I want the Command on the button to bind to a Command on the DataContext of the ItemsControl, not the ItemTemplate. I think the solution has to do with using RelativeSource, but my attempts so far have failed:
<ItemsControl ItemsSource="{Binding Games}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button Command="{Binding Path=GameSelectedCommand, Source={RelativeSource FindAncestor, AncestorType={x:Type ItemsControl}}}"
CommandParameter="{Binding}"
Style="{StaticResource MenuButtonStyle}"
Content="{Binding Name}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
How can I get the Button to bind to the GameSelectedCommand of the ItemsControl's DataContext object?
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您正在将绑定源设置为
ItemsControl本身。因此，您需要取消引用ItemsControl的DataContext：您如何知道这一点？运行应用程序时查看调试输出窗口。您将看到一条消息“无法解析类型‘ItemsControl’上的属性‘GameSelectedCommand’”。
You're setting the source of the binding to the
ItemsControlitself. Therefore, you'll need to dereference theDataContextof theItemsControl:How would you have known this? Take a look at your debug output window when running the app. You'll see a message along the lines of "Cannot resolve property 'GameSelectedCommand' on type 'ItemsControl'".