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System.Drawing.Image image = dh.getImage(Request["id"].ToString());
System.Drawing.Image image1 = dh.getImage(Request["id"].ToString());

Bitmap bmp = new Bitmap(3200,2400); //´´½¨Ò»Õſհ×ͼƬ
Graphics g = Graphics.fromImage(bmp);

g.DrawImage(image,0,0,1600,1200);
g.DrawImage(image1,1601,0,1600,1200);
g.DrawImage(image1, 0, 1201, 1600, 1200);
g.DrawImage(image1, 1601, 1201, 1600, 1200);


//Graphics g1 = Graphics.fromImage(bmp);
bmp.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);




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