我使用附加属性Canvas.Top和Canvas.Left在Canvas上放置了一个元素。然后使用动画将元素移动到不同的坐标集，就像这样：
DoubleAnimation left = new DoubleAnimation( oldLeft, newLeft );
DoubleAnimation top = new DoubleAnimation( oldTop, newTop );
element.BeginAnimation( Canvas.LeftProperty, left );
element.BeginAnimation( Canvas.TopProperty, top );
有没有一种方式可以在 Canvas.Top 或 Canvas.Left 更改时接收事件？最好不涉及动画。
一个可以使用DependencyPropertyDescriptor的AddValueChanged方法，捕获附加属性更改事件。
var descriptor
= DependencyPropertyDescriptor.FromProperty(
Canvas.LeftProperty, typeof( YourControlType )
);
descriptor.AddValueChanged( this, OnCanvasLeftChanged );
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