如何将Button添加为DrawingVisual的子级

Question

I have a DerivedCanvas class which inherits from Canvas. I use it to draw several custom drawing visuals, but can't figure out how to add a Button object as a child of a DrawingVisual object. Below is the code I am using within the DrawingVisual, but nothing shows up at runtime. Is it not possible to add a Button as a child of a DrawingVisual, or am I just doing it wrong?

Button button = new Button { Content = "Exit", Width = 70, Height = 23 };
this.Children.Add(button);

Answer 1

Try this (assuming that dv is your DrawingVisual object and size is the size of dv ):

foreach (var child in dv.Children)
{
    var element = child as UIElement;
    if (element == null) continue;
    element.Arrange(new Rect(size));
}

Answer 2

1.Add try-catch to handle exception. 2.I guess button has created and added.But coordinate is out of visual range.You should alter coordinate of the button and refresh.

Answer 3

are you sure that your code is executed? Place a breakpoint. Also "this" might nor refer to the object you want..