public class ImageCropper extends IHttpHandler{
    public void ProcessRequest(HttpContext context)
    {
        String ImgPath = Convert.ToString(context.Request["p"]);
        int PointX = Convert.ToInt32(context.Request["x"]);
        int PointY = Convert.ToInt32(context.Request["y"]);
        int CutWidth = Convert.ToInt32(context.Request["w"]);
        int CutHeight = Convert.ToInt32(context.Request["h"]);
        int PicWidth = Convert.ToInt32(context.Request["pw"]);
        int PicHeight = Convert.ToInt32(context.Request["ph"]);

        context.Response.ContentType = "image/jpeg";
        ShowImage(HttpContext.Current.Server.MapPath(ImgPath), PointX, PointY, CutWidth, CutHeight, PicWidth, PicHeight).WriteTo(context.Response.OutputStream);
    }

    private MemoryStream ShowImage(String path, int PointX, int PointY, int CutWidth, int CutHeight, int PicWidth, int PicHeight)
    {
        Image image = Image.FromFile(path);
        BeanMap bm = new Bitmap(CutWidth, CutHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
        Graphics graphics = Graphics.FromImage(bm);
        graphics.DrawImage(image, new Rectangle(0, 0, CutWidth, CutHeight), PointX * image.Width / PicWidth, PointY * image.Height / PicHeight, CutWidth * image.Width / PicWidth, CutHeight * image.Height / PicHeight, GraphicsUnit.Pixel);
        int a = path.LastIndexOf('.');
        int b = path.LastIndexOf('\\');
        string _newPic = path.Substring(0, b) + "\\new_" + DateTime.Now.ToFileTimeUtc().ToString("X") + ".jpg";
        bm.Save(_newPic, System.Drawing.Imaging.ImageFormat.Jpeg);
        MemoryStream ms = new MemoryStream();
        bm.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
        image.Dispose();
        graphics.Dispose();
        bm.Dispose();
        return ms;
    }
    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}