当TextBox的属性更改时，在边框上应用情节提要动画

Question

当特定文本框的值更改时，如何在边框上应用情节提要动画。下面是我的xaml代码。

 <Border x:Name="ContentBorder">
     <StackPanel>
          <TextBox Text="{Binding LevelView_ID, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, NotifyOnTargetUpdated=True}">
               <TextBox.Style>
                    <Style TargetType="TextBox">
                         <Style.Triggers>
                              <EventTrigger RoutedEvent="Binding.TargetUpdated">
                                  <BeginStoryboard>
                                      <Storyboard AutoReverse="True">
                                          <DoubleAnimation
                                                    Storyboard.TargetName="ContentBorder"
                                                    Storyboard.TargetProperty="Opacity"
                                                    To=".1"
                                                    Duration="0:0:.5" />
                                      </Storyboard>
                                  </BeginStoryboard>
                              </EventTrigger>
                         </Style.Triggers>
                    </Style>
               </TextBox.Style>
          </TextBox>
          <TextBox Text="{Binding LevelView_Title}" />
        </StackPanel>
  </Border>

注意：这在Storyboard.TargetName =“ ContentBorder”

上显示错误