C#在服务器端裁剪图片代码

//图片路径  String oldPath = Server.MapPath("~/62223231.jpg");      //新图片路径  String newPath = System.IO.Path.GetExtension(oldPath);      //设置截取的坐标和大小  int x = 0, y = 20, width = 200, height = 2400;      //计算新的文件名，在旧文件名后加_new  newPath = oldPath.Substring(0, oldPath.Length - newPath.Length) + "_new" + newPath;  Response.Write(oldPath);  Response.Write("<br>");  Response.Write(newPath);  //定义截取矩形  System.Drawing.Rectangle cropArea = new System.Drawing.Rectangle(x, y, width, height); //要截取的区域大小      //加载图片  System.Drawing.Image img = System.Drawing.Image.FromStream(new System.IO.MemoryStream(System.IO.File.ReadAllBytes(oldPath)));      //判断超出的位置否  if ((img.Width < x + width) || img.Height < y + height)  {    Response.Write("截取的区域超过了图片本身的高度、宽度.");    img.Dispose();    return;  }  //定义Bitmap对象  System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap(img);      //进行裁剪  System.Drawing.Bitmap bmpCrop = bmpImage.Clone(cropArea, bmpImage.PixelFormat);      //保存成新文件  bmpCrop.Save(newPath);      //释放对象  img.Dispose();  bmpCrop.Dispose();