将带有背景图像的图片框保存到文件

Question

有没有办法将带有背景图像的图片框（Windows 表单）保存到文件中？我试图将 picturebox.Image 存储到位图中但它只是图像本身，而不是背景图像。

Answer 1

您可以使用图形或位图组合两个图像。提供了一个很好的例子here

位图

 using (var bitmap = new Bitmap(@"Images\in.jpg"))
    using (var watermark = new Bitmap(@"Images\watermark.png"))
    {
        //Make the watermark semitransparent.
        watermark.Channels.ScaleAlpha(0.8F);
    
        //Watermark image
        bitmap.Draw(watermark, 10, bitmap.Height - watermark.Height - 40, CombineMode.Alpha);
    
        //Save the resulting image
        bitmap.Save(@"Images\Output\out.jpg");
}

图形：

using (var bitmap = new Bitmap(@"Images\in.jpg"))
    using (var watermark = new Bitmap(@"Images\watermark.png"))
    {
        //Make the watermark semitransparent.
        watermark.Channels.ScaleAlpha(0.8F);
    
        //Watermark an image.
        using (var graphics = bitmap.GetGraphics())
        {
            graphics.DrawImage(watermark, 10, bitmap.Height - watermark.Height - 40, CombineMode.Alpha);
            //Save the resulting image
            bitmap.Save(@"Images\Output\out.jpg");
        }
    }

将带有背景图像的图片框保存到文件

Saving picturebox WITH backgroundimage to file

c#

picturebox