从Silverlight中的ItemDragEventArgs获取目标点

Question

如何从ItemDragEventArgs获取目的地点？使用Microsoft.Windows.DragEventArgs e很容易：e.GetPosition(<UIElement to which the point is relative to>)

XAML

<toolkit:PanelDragDropTarget AllowDrop="True" ItemDroppedOnTarget="DragAndDrop_ItemDroppedOnTarget">

代码

private void DragAndDrop_ItemDroppedOnTarget(object sender, ItemDragEventArgs e)
{
   // how to get the destination Point here??
}

Answer 1

这看起来像一个黑客，但它起作用并且非常准确：

private Point _releasePoint;

public Grid()
{
   Grid.MouseLeftButtonUp += new MouseButtonEventHandler(Grid_MouseLeftButtonUp);
}

void Grid_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
   _releasePoint = e.GetPosition(Grid);
}

private void DragAndDrop_ItemDroppedOnTarget(object sender, ItemDragEventArgs e)
{
   // fires next and _releasePoint is already set
}