WPF StoryBoard.Completed 事件未触发
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WPF StoryBoard.Completed event not firing
提问by Marko Devcic
I have an animation before closing the main window, like the following code shows. Problem is the StoryBoard.Completedis not firing. Any clues what is causing this?
我在关闭主窗口之前有一个动画，如下面的代码所示。问题是StoryBoard.Completed没有开火。任何线索是什么导致了这种情况？
Code
代码
DoubleAnimation dblAnimX = new DoubleAnimation(1.0, 0.0, new Duration(TimeSpan.FromSeconds(0.5)));
dblAnimX.SetValue(Storyboard.TargetProperty, this);
DoubleAnimation dblAnimY = new DoubleAnimation(1.0, 0.0, new Duration(TimeSpan.FromSeconds(0.5)));
dblAnimY.SetValue(Storyboard.TargetProperty, this);
Storyboard story = new Storyboard();
Storyboard.SetTarget(dblAnimX, this);
Storyboard.SetTarget(dblAnimY, this);
Storyboard.SetTargetProperty(dblAnimX, new PropertyPath("RenderTransform.ScaleX"));
Storyboard.SetTargetProperty(dblAnimY, new PropertyPath("RenderTransform.ScaleY"));
story.Children.Add(dblAnimX);
story.Children.Add(dblAnimY);
story.Begin(this);
story.Completed += (o, s) => { this.Close(); };
回答by Clemens
Add the Completed handler before calling Begin:
在调用 Begin 之前添加 Completed 处理程序：
story.Completed += (o, s) => Close();
story.Begin(this);
The reason for this behaviour is that the Completed handler is attached to an internal Clock object that is created during Begin. See the Remarks section in Completed:
此行为的原因是 Completed 处理程序附加到在 Begin 期间创建的内部时钟对象。请参阅已完成中的备注部分：
Although this event handler appears to be associated with a timeline, it actually registers with the Clock created for this timeline. For more information, see the Timing Events Overview.
尽管此事件处理程序看起来与时间线相关联，但它实际上注册了为此时间线创建的时钟。有关更多信息，请参阅时序事件概述。
