Storyboard.Gettarget返回的结果是Null

Question

DoubleAnimation da = new DoubleAnimation();
da.From = 0;
da.To = 400;
da.Duration = new Duration(TimeSpan.FromSeconds(1));
Storyboard.SetTargetName(da, "r13");
Storyboard.SetTargetProperty(da, new PropertyPath(Canvas.LeftProperty));
mySubStoryBoard.Children.Add(da);
DependencyObject do =Storyboard.GetTarget(mySubStoryBoard.Children[0]);
string str = Storyboard.GetTargetName(mySubStoryBoard.Children[0]);

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结果：do == null，str == r13。

为什么？帮助我，谢谢。

Answer 1

你期待什么？您设置了Storyboard.SetTargetName Method和Storyboard.SetTargetProperty Method，但未设置Storyboard.SetTarget Method。

这就是Storyboard.GetTarget Method返回null的原因。