在WPF中将一个图像拖放到另一个图像上

本文关键字：图像 一个 拖放 另一个 WPF | 更新日期: 2023-09-27 18:17:37

我正试图将一个图像(此图像在树视图)移动到其他图像。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);
    }

一旦我把图像放到画布上。它会粘在上面。我想再次把它移动到同一个画布上。你能建议一下如何实现吗?提前感谢

在WPF中将一个图像拖放到另一个图像上

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;
    }
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