public ActionResult DelFile()
        {
            bool result = false;

            try
            {
                int detailId = int.Parse(Request.Form["detailId"]);
                if (detailId > 0)
                {
                    result = UploadFileService.DelFileByDetailId(detailId);
                }
            }
            catch (Exception ex)
            {
                result = false;
            }
            return(Json(new { result = result }));
        }