C# 消除代码隐藏中的情节提要已完成处理程序

一点背景：

我正在构建一个窗口，我有一个故事板，我用它来在用户启动的任务完成后短暂显示一个弹出窗口，无需用户确认。看起来是这样的：

<UserControl.Resources>
    <Storyboard x:Name="FadingFeedback" x:Key="FadingFeedback" Completed="FadingFeedback_Completed">
        <DoubleAnimation  
                         Storyboard.TargetProperty="Opacity" 
                         From="0.5" 
                         To="0" 
                         BeginTime="0:0:0" 
                         Duration="0:0:2.0">
            <DoubleAnimation.EasingFunction>
                <ExponentialEase Exponent="10" EasingMode="EaseIn" />
            </DoubleAnimation.EasingFunction>
        </DoubleAnimation>
    </Storyboard>
</UserControl.Resources>

如果合适，ViewModel将设置

DoShowMessage

属性，XAML中的绑定将显示弹出窗口并开始故事板

现在，我已经在弹出窗口的代码隐藏中完成了

处理程序，它只执行以下操作：

    void StatusFader_Completed(object sender, EventArgs e)
    {
        popup.IsOpen = false;
    }

这就足够了，因为
popup.IsOpen
绑定到ViewModel
DoShowMessage
上的底层属性，它将重置该布尔值

我的问题是：

情节提要完成后，是否有“更好”的方法来处理DoShowMessage属性的重置？或者换言之，在XAML本身中是否有这样做的方法？我已经阅读了关于代码隐藏应该（大部分）没有视图代码的观点/约定，但是（至少对我来说）这（事件处理程序）似乎是一种合理的方法。想知道在XAML中是否有这样做的方法。
是的，当然可以用另一种方法。通过使用关键帧的对象动画设置
popup.IsOpen=“False”

例如：

情节提要

<Storyboard x:Name="FadingFeedback" x:Key="FadingFeedback"> 
    <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0.5" 
                             To="0" BeginTime="0:0:0" Duration="0:0:2.0">

        <DoubleAnimation.EasingFunction>
            <ExponentialEase Exponent="10" EasingMode="EaseIn" />
        </DoubleAnimation.EasingFunction>
    </DoubleAnimation>

    <ObjectAnimationUsingKeyFrames BeginTime="0:0:2.0" Storyboard.TargetProperty="(Popup.IsOpen)">
        <DiscreteObjectKeyFrame KeyTime="0:0:0">
            <DiscreteObjectKeyFrame.Value>
                <sys:Boolean>False</sys:Boolean>
            </DiscreteObjectKeyFrame.Value>
        </DiscreteObjectKeyFrame>
    </ObjectAnimationUsingKeyFrames>
</Storyboard>

<Popup Name="popup" Placement="Center" PopupAnimation="Fade" AllowsTransparency="True" IsOpen="{Binding DoShowMessage}">
    <Popup.Style>
        <Style>
            <Style.Triggers>
                <DataTrigger Binding="{Binding DoShowMessage}" Value="True">
                <!--<Setter Property="Popup.IsOpen" Value="True" />--> <!-- not necessarily, because we have Popup.IsOpen = True -->

                    <DataTrigger.EnterActions>
                        <BeginStoryboard Storyboard="{StaticResource FadingFeedback}" />
                    </DataTrigger.EnterActions>
                </DataTrigger>
            </Style.Triggers>
            </Style>
    </Popup.Style>  
    ...
</Popup>        

代码隐藏

private void OpenButton_Click(object sender, RoutedEventArgs e)
{
    MyPopup.BeginAnimation(Popup.IsOpenProperty, null);
    MyPopup.IsOpen = true;
}     

有一个选择，或者只需在事件
情节提要_Completed
中拖放
弹出窗口.IsOpen
为False，或者在动画中执行，但要访问代码，必须将其删除

对于我自己，我通常这样做，创建一个附加的依赖属性（布尔值），将触发动画绑定到此属性。如果它的值为true，则启动动画，但要重新运行，在事件
情节提要\u Completed
中，我必须将属性折叠为false。就我个人而言，这是一种更简单的方法
 感谢安纳托利-我正在阅读你写的东西，并试图决定什么对我有意义。
<Storyboard x:Name="FadingFeedback" x:Key="FadingFeedback"> 
    <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0.5" 
                             To="0" BeginTime="0:0:0" Duration="0:0:2.0">

        <DoubleAnimation.EasingFunction>
            <ExponentialEase Exponent="10" EasingMode="EaseIn" />
        </DoubleAnimation.EasingFunction>
    </DoubleAnimation>

    <ObjectAnimationUsingKeyFrames BeginTime="0:0:2.0" Storyboard.TargetProperty="(Popup.IsOpen)">
        <DiscreteObjectKeyFrame KeyTime="0:0:0">
            <DiscreteObjectKeyFrame.Value>
                <sys:Boolean>False</sys:Boolean>
            </DiscreteObjectKeyFrame.Value>
        </DiscreteObjectKeyFrame>
    </ObjectAnimationUsingKeyFrames>
</Storyboard>

<Popup Name="popup" Placement="Center" PopupAnimation="Fade" AllowsTransparency="True" IsOpen="{Binding DoShowMessage}">
    <Popup.Style>
        <Style>
            <Style.Triggers>
                <DataTrigger Binding="{Binding DoShowMessage}" Value="True">
                <!--<Setter Property="Popup.IsOpen" Value="True" />--> <!-- not necessarily, because we have Popup.IsOpen = True -->

                    <DataTrigger.EnterActions>
                        <BeginStoryboard Storyboard="{StaticResource FadingFeedback}" />
                    </DataTrigger.EnterActions>
                </DataTrigger>
            </Style.Triggers>
            </Style>
    </Popup.Style>  
    ...
</Popup>        

<Grid>
    <Grid.Triggers>
        <EventTrigger SourceName="CloseButton" RoutedEvent="Button.Click">
            <BeginStoryboard>
                <Storyboard>
                    <BooleanAnimationUsingKeyFrames Storyboard.TargetName="MyPopup"
                                                    Storyboard.TargetProperty="(Popup.IsOpen)" 
                                                    Duration="0:0:0">

                        <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />
                    </BooleanAnimationUsingKeyFrames>
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
    </Grid.Triggers>

    <Popup x:Name="MyPopup" Width="200" Height="200" IsOpen="True">
        <Grid Background="Azure">
            <Label Content="Test label" />
        </Grid>
    </Popup>

    <Button Name="OpenButton" Content="OpenButtonFromCode" Width="140" Height="30" Click="OpenButton_Click" />
    <Button Name="CloseButton" Content="CloseButtonfromEventTrigger" Width="180" Height="30" Margin="0,80,0,0" />
</Grid>

private void OpenButton_Click(object sender, RoutedEventArgs e)
{
    MyPopup.BeginAnimation(Popup.IsOpenProperty, null);
    MyPopup.IsOpen = true;
}