c# - WPF 弹出窗口 : open with animation

Question

我正在使用 wpf 弹出控件。

<Popup x:Name="tabHolder" IsOpen="False" 
    PopupAnimation="Slide" Placement="Bottom" 
    PlacementTarget="{Binding ElementName=mainWidgetWindow}">
    <Grid Height="105" Width="315" />
</Popup>

这里我设置了弹出动画属性为滑动。但是当它打开时，它没有动画。我是否必须为弹出窗口添加任何其他配置才能使用动画选项幻灯片打开？

我使用的是 .net 框架 3.5 版。

Answer 1

来自MSDN

A Popup can only animate when the AllowsTransparency property is set to true. This requires the application that creates the Popup control to run with full trust. If the PlacementTarget is animated, the Popup will not be animated.

XAML 应该看起来像

<DockPanel  Width="500" Background="Aqua">
  <Popup Placement="Center" PlacementRectangle="0,0,30,50"  
          IsOpen ="True" AllowsTransparency="True"
          PopupAnimation="Fade">
    <TextBlock Background="Purple">Popup Text</TextBlock>
  </Popup>
</DockPanel>

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