WPF中如何将Canvas里面的图片和ListBox里面的图片实现互相拖拽，并且拖拽后减少相应的图片

WPF中如何将Canvas里面的图片和ListBox里面的图片实现互相拖拽，并且拖拽后减少相应的图片？
例图如下：

图1-1 --------------------编程问答-------------------- 哦，我也不知道。 --------------------编程问答-------------------- 哥们！不解决问题就算了！别捣乱行吗？ --------------------编程问答--------------------         #region 对于拖动事件的处理

        private void c_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                try
                {
                    dragging = true;//标记鼠标按下
                    mousePoint = e.GetPosition(this.c);//获取鼠标在但前canvas内的位置
                    mouseCtrl = (Control)e.Source;   //获得事件触发的源，即哪个控件
                    VisualBrush v;
                    v = new VisualBrush(mouseCtrl);//利用VisualBrush得到控件的影像
                    shadow.Width = mouseCtrl.Width;
                    shadow.Height = mouseCtrl.Height;
                    shadow.Fill = v;//将影像填充给矩形
                    Canvas.SetLeft(shadow, Canvas.GetLeft(mouseCtrl));
                    Canvas.SetTop(shadow, Canvas.GetTop(mouseCtrl));
                    shadow.Visibility = Visibility.Visible;//使矩形可见
                    //Canvas.SetZIndex(shadow, 0);//可以通过SetZIndex设置阴影的z方向位置
                    c.CaptureMouse();//强制捕获鼠标。这在对于背景透明的窗体里面是必须的
                }
                catch
                {

                }
            }
        }

        private void c_MouseMove(object sender, MouseEventArgs e)
        {
            if (dragging)
            {
                if (e.LeftButton == MouseButtonState.Pressed)
                {
                    Point theMousePoint = e.GetPosition(this.c);
                    Canvas.SetLeft(shadow, theMousePoint.X - (mousePoint.X - Canvas.GetLeft(shadow)));
                    Canvas.SetTop(shadow, theMousePoint.Y - (mousePoint.Y - Canvas.GetTop(shadow)));//简单的计算，只移动shadow
                    mousePoint = theMousePoint;
                }
            }
        }

        private void c_MouseUp(object sender, MouseButtonEventArgs e)
        {
            try
            {
                dragging = false;
                Mouse.Capture(null);//取消强制捕获
                shadow.Visibility = Visibility.Hidden;//隐藏shadow
                Canvas.SetLeft(mouseCtrl, Canvas.GetLeft(shadow));
                Canvas.SetTop(mouseCtrl, Canvas.GetTop(shadow));//将控件放到新的位置
            }
            catch
            {

            }
            doarrow();
        }

        #endregion

图片的减少就由你自己来控制了 --------------------编程问答-------------------- 从listBox 控件里面拖出来的图片！要自动减少！ --------------------编程问答-------------------- Use MVVM pattern. Don't use too much code-behind. --------------------编程问答-------------------- 做的好

补充：.NET技术 ,  .NET技术前瞻