WPF Diagram Designer 两图片关联连接失败

Question

后台图片显示在 DesignerCanvas 中，  两图片间的连接线可以出来，但拖动两个图片时，连接线未关联在两图片上。请大家帮忙一下。连接代码如下：
            Connector sourceConnector = new Connector();                        Point pt = new Point();            pt.X = position.X + newItem.Width / 2;
            pt.Y = position.Y;
            sourceConnector.DragStartPoint = pt;
            
            sourceConnector.Position = pt;
            sourceConnector.Orientation = ConnectorOrientation.Right;
            sourceConnector.ParentDesignerItem = newItem;            sourceConnector.ParentDesignerItem.IsDragConnectionOver = false;
            sourceConnector.ParentDesignerItem.IsSelected = false;            Connector sinkConnector = new Connector();                       Point pt2 = new Point();
            pt2.X = position2.X;
            pt2.Y = position2.Y - newItem2.Height / 2;                       sinkConnector.Position = pt2;
            sinkConnector.Orientation = ConnectorOrientation.Top;
            sinkConnector.ParentDesignerItem = newItem2;
            
            Connection newConnection = new Connection(sourceConnector, sinkConnector);                     dc.Children.Insert(0, newConnection);

Answer 1

帮帮忙了，有用过的人没 

Answer 2

顶一下，已经沉的差不多了。

Answer 3

算了呢，看来这是没啥技术含量的问题了。