Question

I have a Rectangle nested within a Canvas. The rectangle has a MouseDragElementBehavior attached to it, so it can move freely in the canvas.

I need to calculate the position of the rectangle after each drag. The problem is that the

Canvas.GetTop(rectangle1)

only works for the first time, i.e. before the rectangle is dragged. After the drag, the method call returns the initial position.

Answer 1

Those behaviors usually work by applying a RenderTransform, if it uses a TranslateTransform you can get the offset value from that and add it to the canvas position.

Alternatively you might just want to implement your own dragging logic.