C#将System.Drawing.Graphics保存到文件 [英] c# save System.Drawing.Graphics to file

问题描述

我有一个System.Drawing.Graphics是从一个图片框中拍摄的.

I have a System.Drawing.Graphics took from a picturebox.

基本上，我在存储在图片框中的背景图像上画了一些线 现在我希望保存一个包含背景图像的png，所有内容都在该位置绘制...

basically I draw some lines over a background image stored into the picturebox now I wish save a png that contains the background image and everything is drawn over there...

有没有办法做到这一点? 预先感谢

is there a way to do this? thanks in advance

推荐答案

如果要在Paint事件上绘制这些线条，则需要使用BackgroundImage创建一个BitMap，并使用Bitmap的Graphics调用paint函数，然后调用位图.Save().

If you are drawing these lines on the Paint event then you need to create a BitMap with the BackgroundImage and call your paint function with the Bitmap's Graphics, and then call Bitmap.Save().

        Bitmap bmp = new Bitmap(MyPictureBox.BackgroundImage);
        var g = Graphics.FromImage(bmp);
        MyPictureBox.OnPaint(new System.Windows.Forms.PaintEventArgs(g, bmp.GetBounds());

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