在 WPF 中将一张图像拖放到另一张图像上答案

【问题标题】：drag and drop one image over other image in WPF在 WPF 中将一张图像拖放到另一张图像上
【发布时间】：2013-06-10 12:47:23
【问题描述】：

我正在尝试将一张图片（树视图中的这张图片）移动到另一张图片中。使用以下处理程序

 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 = 50, Height = 30, Source = image };

        Canvas.SetLeft(imageControl, e.GetPosition(this.Canvas).X);
        Canvas.SetTop(imageControl, e.GetPosition(this.Canvas).Y);
        this.Canvas.Children.Add(imageControl);
    }

一旦我将图像放在画布上。它会坚持下去。我想再次在同一个画布上移动它。你能建议它如何实现吗？提前致谢

【问题讨论】：

标签： c# wpf drag-and-drop drag

【解决方案1】：

通过修改代码解决了这个问题。

 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.All);
        moving = true;
    }


    private void DropImage(object sender, DragEventArgs e)
    {
        Image imageControl = new Image();
        if ((e.Data.GetData(typeof(ImageSource)) != null))
        {
            ImageSource image = e.Data.GetData(typeof(ImageSource)) as ImageSource;
            imageControl = new Image() { Width = 50, Height = 30, Source = image };
        }
        else
        {
            if ((e.Data.GetData(typeof(Image)) != null))
            {
                Image image = e.Data.GetData(typeof(Image)) as Image;
                imageControl = image;
                if (this.Canvas.Children.Contains(image))
                {
                    this.Canvas.Children.Remove(image);
                }
            }
        }

        Canvas.SetLeft(imageControl, e.GetPosition(this.Canvas).X);
        Canvas.SetTop(imageControl, e.GetPosition(this.Canvas).Y);
        imageControl.MouseLeftButtonDown += imageControl_MouseLeftButtonDown;
        this.Canvas.Children.Add(imageControl);

    }

    void imageControl_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        Image image = e.Source as Image;
        DataObject data = new DataObject(typeof(Image), image);
        DragDrop.DoDragDrop(image, data, DragDropEffects.All);
        moving = true;
    }

【讨论】：