c# - 使用 ObjectAnimationUsingKeyFrames 切换可见性

Question

我不确定为什么以下不起作用。当绑定(bind)模型属性更改时，我尝试每 0.2 秒隐藏和显示一个文本框，持续 1.2 秒。任何人都可以看到这种风格的问题或者我如何尝试这样做？

<Style x:Key="FlashStyle" TargetType="TextBlock">
        <Style.Triggers>
            <EventTrigger RoutedEvent="Binding.TargetUpdated" >
                <EventTrigger.Actions>
                    <BeginStoryboard>
                        <Storyboard>
                            <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="(UIElement.Visibility)">
                                <DiscreteObjectKeyFrame KeyTime="00:00:00.2" Value="{x:Static Visibility.Visible}"/>
                                <DiscreteObjectKeyFrame KeyTime="00:00:00.4" Value="{x:Static Visibility.Collapsed}"/>
                                <DiscreteObjectKeyFrame KeyTime="00:00:00.6" Value="{x:Static Visibility.Visible}"/>
                                <DiscreteObjectKeyFrame KeyTime="00:00:00.8" Value="{x:Static Visibility.Collapsed}"/>
                                <DiscreteObjectKeyFrame KeyTime="00:00:01" Value="{x:Static Visibility.Visible}"/>
                            </ObjectAnimationUsingKeyFrames>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger.Actions>
            </EventTrigger>
        </Style.Triggers>
    </Style>

    <TextBlock Text="{Binding Data.QuotePrice, UpdateSourceTrigger=PropertyChanged}" Style="{StaticResource FlashStyle}" />

Answer 1

Binding.TargetUpdated event不会发生:

Occurs when a value is transferred from the binding source to the binding target, but only for bindings with the NotifyOnTargetUpdated value set to true.

除了precedence之外我唯一能想到的(如果这是您的实际代码，应该没问题)。