如何使WPF TextBlock在其值更新時旋轉？

Question

我試圖旋轉TextBlock 360度，只要它是綁定更新。

從我讀過的所有東西都應該可以工作，但是它沒有任何效果。我究竟做錯了什麼？

<TextBlock VerticalAlignment="Center" Text="{Binding Total, NotifyOnTargetUpdated=True}"> 

    <TextBlock.RenderTransform> 
     <RotateTransform x:Name="TotalSpinTransform" Angle="0"/> 
    </TextBlock.RenderTransform> 

    <TextBlock.Triggers> 
     <EventTrigger RoutedEvent="Binding.TargetUpdated"> 
      <EventTrigger.EnterActions> 
       <BeginStoryboard> 
        <Storyboard> 
         <DoubleAnimation Storyboard.TargetProperty="(TextBlock.RenderTransform).(RotateTransform.Angle)" 
          From="0" To="360" Duration="0:0:0.2" AutoReverse="True"/> 
        </Storyboard> 
       </BeginStoryboard> 
      </EventTrigger.EnterActions> 
     </EventTrigger> 
    </TextBlock.Triggers> 

</TextBlock>  

Answer 1

無論EnterActions也不ExitActions適用於EventTrigger。不幸的是，這些屬性在TriggerBase上定義，因此它們出現在EventTrigger上。試試這個：

<EventTrigger RoutedEvent="Binding.TargetUpdated"> 
      <BeginStoryboard> 
       <Storyboard> 
        <DoubleAnimation Storyboard.TargetProperty="(TextBlock.RenderTransform).(RotateTransform.Angle)" 
         From="0" To="360" Duration="0:0:0.2" AutoReverse="True"/> 
       </Storyboard> 
      </BeginStoryboard> 
    </EventTrigger>