C#截图代码

System.Drawing.Image myImage = new Bitmap(700, 500);//截屏大小         Graphics g = Graphics.FromImage(myImage);         g.CopyFromScreen(new Point(300, 160), new Point(0, 0), new Size(700, 500));//左300顶160宽700高500         IntPtr dc1 = g.GetHdc();         g.ReleaseHdc(dc1);         String path = Server.MapPath("~/aaa/");         Random objRand = new Random();         String pic_name = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + Convert.ToString(objRand.Next(99) * 97 + 100) + ".jpg";         string allpathname = path + pic_name;         myImage.Save(allpathname);