WPF DragMove()

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  2012年5月15日 7:37

   

   
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  I want to drag the window, but when I call the function "this.DragMove()", 

  the app break and show message "Can only call DragMove when primary mouse button is down.".

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  I want to know how to notice the window Mouse left button is down?

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  cs:

  public void OnPlayPanelMouseLeftButtonDown(object sender, AsyncEventWithDataArgs<Point> e)
  {}

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