public ActionResult UploadImg(FormCollection form, HttpPostedFileBase file)
        {
            try
            {
                string filePathName = string.Empty;
                string localPath    = string.Empty;
                localPath = Path.Combine(HttpRuntime.AppDomainAppPath, "Upload/Images/");
                if (Request.Files.Count == 0)
                {
                    throw new Exception("请选择上传文件!");
                }
                string ex = Path.GetExtension(file.FileName);
                filePathName = Guid.NewGuid().ToString("N") + ex;
                if (!System.IO.Directory.Exists(localPath))
                {
                    System.IO.Directory.CreateDirectory(localPath);
                }
                string imgAddress = Path.Combine(localPath, filePathName);
                file.SaveAs(imgAddress);

                FileHelper.AddWaterText(imgAddress, "编码:30GAA02AA010$名称:#2澄清池润滑水进水阀$时间:" + DateTime.Now + "", imgAddress, 255, 14);

                return(Json(new
                {
                    Status = 200,
                    Message = "上传图片成功!",
                    Data = localPath
                }));
            }
            catch (Exception)
            {
                //扔出异常
                throw;
            }
        }