Storyboard.Gettarget返回的結果是空

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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結果：DO == NULL，海峽== R13。

爲什麼？幫幫我，謝謝。

Answer 1

你期望什麼？您設置了Storyboard.SetTargetName Method和Storyboard.SetTargetProperty Method，但不是Storyboard.SetTarget Method。

這就是爲什麼Storyboard.GetTarget Method返回null。