Asp.Net or WebAPI get form data stream (bulk file uploads)

        // Web WebAPI or acquired form data stream (bulk file upload)
        public UploadFile a JsonResult ()
        {
            // HttpPostedFileBase FileBase Request.Files = [ "fileToUploadKeyID"];
            HttpPostedFileBase FileBase Request.Files = [0]; // Get client upload the collection of files

            string fileName = string.Empty; // relative file path
            String = errMsg An string.Empty;

            IF (FileBase == null || fileBase.ContentLength == 0)
            {
                errMsg An = "file is empty";
            }
            the else
            {
                the MaxSize = 1024 1024 * int *. 4;
                IF (fileBase.InputStream.Length> the MaxSize)
                {
                    errMsg An = "file is too large";
                }
                else
                {
                    try
                    {
                        fileName = System.IO.Path.GetFileName(fileBase.FileName);
                        fileName = "/upload/" + DateTime.Now.ToString("yyMMddHHmmssff") + "." + fileName.Split('.')[1];
                        var filePath = System.Web.HttpContext.Current.Server.MapPath(fileName);
                        fileBase.SaveAs(filePath);//保存文件
                    }
                    catch
                    {
                        errMsg = "上传失败";
                    }

                }
            }
            return Json(new { errMsg = errMsg, fileName = fileName });
        }