<Window x:Class="WpfApplication8.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="MainWindow" Height="" Width="">

    <Grid>

        <Canvas Margin="0,0,216,0" Name="canvas1" Background="Crimson" AllowDrop="True" Drop="C1Drop">

            <Rectangle Height="" Margin="10,10" Name="rectangle1"  Width="" Fill="Azure" PreviewMouseMove="RectMove" />

        </Canvas>

        <Canvas HorizontalAlignment="Right" Margin="0,0,0,0" Name="canvas2"

                Width="" Background="DarkSalmon" AllowDrop="True" Drop="C2Drop"/>

    </Grid>

</Window>

        private void C1Drop(object sender, DragEventArgs e)

        {

            if (e.Data.GetDataPresent(typeof(Rectangle)))

            {

                string str = ((Canvas)(this.rectangle1.Parent)).Name.ToString();

                if(str.Equals("canvas2"))

                {

                    Rectangle rect = (Rectangle)e.Data.GetData(typeof(Rectangle));

                    this.canvas2.Children.Remove(rect);

                    this.canvas1.Children.Add(rect);

                }

            }

        }

        private void C2Drop(object sender, DragEventArgs e)

        {

            if (e.Data.GetDataPresent(typeof(Rectangle)))

            {

                string str = ((Canvas)(this.rectangle1.Parent)).Name.ToString();

                if (str.Equals("canvas1"))

                {

                    Rectangle rect = (Rectangle)e.Data.GetData(typeof(Rectangle));

                    this.canvas1.Children.Remove(rect);

                    this.canvas2.Children.Add(rect);

                }

            }

        }

        private void RectMove(object sender, MouseEventArgs e)

        {

            if (e.LeftButton == MouseButtonState.Pressed)       // 如果鼠标左键被按下

            {

                DataObject data = new DataObject(typeof(Rectangle), this.rectangle1);

                DragDrop.DoDragDrop(this.rectangle1, data, DragDropEffects.Move);

            }

        }