创建图形并保存为位图 [英] Create graphic and save it as Bitmap

问题描述

我有两个问题：

1）我有一个图片框和它的码头设置为填充。当我调整表格我无法在图片框被延长的部分创建一个图形。有什么问题？

1) I have a PictureBox and its Dock is set to Fill. When I resize the Form I cannot create a Graphic on the part of the PictureBox that is extended. What is the problem?

2）我想转换是在图片框创建位图图形，并保存为
* .jpg或* .BMP。我怎样才能做到这一点？

2) I want to convert the Graphic that is created on the PictureBox to Bitmap and save it as *.JPG or *.bmp. How can I do this?

推荐答案

您可以使用手柄装置，以获得从位图图片框的

you can use the handle device to get the bitmap out of the picture box

Graphics g = pictureBox1.CreateGraphics();          
Bitmap bitMap = Bitmap.FromHbitmap(g.GetHdc());
bitMap.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);

甚至更好，如果图片框does`nt修改图像，你可以直接从PictureBox控件获得图像

or even better, if the pictureBox does`nt modify the image, you can directly get the image from the pictureBox control

pictureBox1.Image.Save("path", System.Drawing.Imaging.ImageFormat.Jpeg);

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