WPF 触发器绑定到 MVVM 属性 [英] WPF Trigger binding to MVVM property

问题描述

我有一个包含图像的数据模板，如果 ViewModel 中的属性值为 true，我希望将其隐藏.谁能告诉我为什么下面的 xaml 不起作用?

I have a datatemplate containing an image that I want to be hidden if the the value of a property in a ViewModel is true. Can anyone tell me why the the xaml below does not work?

<Image x:Name="img" Source="..ImagesList_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>

推荐答案

不是这样的

<Setter Property="Visibility" Value="Hidden" />

?

我假设您使用 INotifyProptyChanged.

I assume you use INotifyProptyChanged.

编辑我做了一些谷歌搜索，我认为你需要使用某种模板才能使触发器工作.

EDIT I did some Googling and I think you need to use some sort of template in order to make the trigger work.

例如:http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/ae2dbfb7-5dd6-4352-bfa1-53634289329d

http://www.thejoyofcode.com/Help_Why_cant_I_use_DataTriggers_with_controls_in_WPF.aspx

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