asp.net mvc 上传图片流存服务器

 　　　　　　　　　　　　foreach (var file in Request.Files)
                     {
                         var pathSrc = System.Web.HttpContext.Current.Server.MapPath("~/Upload/" + dt + "." + file.Name.Split('.')[]);
                         using (FileStream fs = new FileStream(pathSrc, FileMode.Create))
                         {
                             file.Value.CopyTo(fs);
                         }

                         return Response.AsJson(new { img = "http://" + Request.Url.HostName + "/Upload/" + dt + "." + file.Name.Split('.')[] });
                     }