如何在窗口加载的事件（代码隐藏）上触发StoryBoard？

Question

我有一个带有StoryBoard的窗口，它存储在Window的资源中，如下所示：

<Storyboard  x:Key="FadeInStoryBoard">
        <DoubleAnimation Storyboard.TargetName="GridNotificationWindow" From="0.01" To="1" Storyboard.TargetProperty="Opacity" Duration="0:0:2"/>
        <DoubleAnimation Storyboard.TargetName="GridNotificationWindow" From="1" To="0" Storyboard.TargetProperty="Opacity" Duration="0:0:2" BeginTime="0:0:6"/>
    </Storyboard>

在代码背后如下：

private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        Storyboard s = (Storyboard)this.TryFindResource("FadeInStoryBoard");
        if(s!=null)
        {
            BeginStoryboard(s);
        }
    }     

但似乎不起作用...... 如果我在xaml中设置它，它正在工作：

<EventTrigger RoutedEvent="Window.Loaded" SourceName="GridNotificationWindow">
                <BeginStoryboard x:Name="FadeInStoryBoard" >
                    <Storyboard>
                        <DoubleAnimation Storyboard.TargetName="GridNotificationWindow" From="0.01" To="1" Storyboard.TargetProperty="Opacity" Duration="0:0:2"/>
                        <DoubleAnimation Storyboard.TargetName="GridNotificationWindow" From="1" To="0" Storyboard.TargetProperty="Opacity" Duration="0:0:2" BeginTime="0:0:6"/>
                    </Storyboard>
                </BeginStoryboard>
            </EventTrigger>

如何修复代码？

Answer 1

在调用 BeginStoryboard

之前设置目标

  Storyboard.SetTarget(s, TargetName);