WPF数据绑定：如何访问“父”数据上下文？ [英] WPF Databinding: How do I access the "parent" data context?

问题描述

我有一个窗口中包含的列表（见下文）。窗口的 DataContext 有两个属性，项目和 AllowItemCommand 。

I have a list (see below) contained in a window. The window's DataContext has two properties, Items and AllowItemCommand.

如何获取超链接的绑定的命令 property需要解决窗口的 DataContext ？

How do I get the binding for the Hyperlink's Command property needs to resolve against the window's DataContext?

<ListView ItemsSource="{Binding Items}">
  <ListView.View>
    <GridView>
      <GridViewColumn Header="Action">
        <GridViewColumn.CellTemplate>
          <DataTemplate>
            <StackPanel>
              <TextBlock>

                <!-- this binding is not working -->
                <Hyperlink Command="{Binding AllowItemCommand}"
                           CommandParameter="{Binding .}">
                    <TextBlock Text="Allow" />
                </Hyperlink>

              </TextBlock>
            </StackPanel>
          </DataTemplate>
        </GridViewColumn.CellTemplate>
      </GridViewColumn>
    </GridView>
  </ListView.View>
</ListView>

推荐答案

你可以这样尝试：

...Binding="{Binding RelativeSource={RelativeSource FindAncestor, 
AncestorType={x:Type Window}}, Path=DataContext.AllowItemCommand}" ...

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