WPF C＃拖放事件

<ListBox>
        <ListBox.Resources>
            <Style TargetType=\"{x:Type Image}\">
                <Setter Property=\"Width\" Value=\"100\"/>
                <Setter Property=\"Height\" Value=\"100\"/>
                <EventSetter Event=\"MouseLeftButtonDown\" Handler=\"DragImage\"/>
            </Style>
        </ListBox.Resources>
        <ListBoxItem>
            <Image Source=\"toolitem1.png\"></Image>
        </ListBoxItem>
    </ListBox>
 <Canvas x:Name=\"Canvas\" AllowDrop=\"True\" Background=\"Aqua\" Drop=\"DropImage\"/>

private void DragImage(object sender, MouseButtonEventArgs e)
    {

        Image image = e.Source as Image;
        DataObject data = new DataObject(typeof(ImageSource), image.Source);
        DragDrop.DoDragDrop(image, data, DragDropEffects.Copy);

    }


    private void DropImage(object sender, DragEventArgs e)
    {
        ImageSource image = e.Data.GetData(typeof(ImageSource)) as ImageSource;
        Image imageControl = new Image() { Width = image.Width, Height = image.Height, Source = image };
        Canvas.SetLeft(imageControl, e.GetPosition(this.Canvas).X);
        Canvas.SetTop(imageControl, e.GetPosition(this.Canvas).Y);
        this.Canvas.Children.Add(imageControl);
}