WPF 触发器绑定(bind)到 MVVM 属性

Question

我有一个包含图像的数据模板，如果 ViewModel 中的属性值为 true，我想隐藏该图像。谁能告诉我为什么下面的 xaml 不起作用？

<Image x:Name="img" Source="..\Images\List_16.png" Margin="0,0,5,0">
  <Image.Style>
    <Style>
      <Style.Triggers>
        <DataTrigger Binding="{Binding CurrentListHasPendingChanges}" Value="True">
          <Setter Property="Image.Visibility" Value="Hidden" />
        </DataTrigger>
        <DataTrigger Binding="{Binding CurrentListHasPendingChanges}" Value="False">
          <Setter Property="Image.Visibility" Value="Visible" />
        </DataTrigger>
      </Style.Triggers>
    </Style>
  </Image.Style>
</Image>

Answer 1

我刚刚使用 ContentControl 做了类似的事情。

<ContentControl Content="{Binding CurrentListHasPendingChanges}">
  <ContentControl.ContentTemplate>
    <DataTemplate>
      <Image x:Name="img" Source="..\Images\List_16.png" Margin="0,0,5,0" Visibility="Hidden" />
      <DataTemplate.Triggers>
        <DataTrigger Binding="{Binding}" Value="False">
          <Setter Property="Image.Visibility" Value="Visible" />
        </DataTrigger>
      </DataTemplate.Triggers>
    </DataTemplate>
  </ContentControl.ContentTemplate>
</ContentControl>

来自 http://karlhulme.wordpress.com/2007/03/06/using-a-contentcontrol-and-datatemplate-to-indicate-new-andor-modified-data/