ASP.NET MVC上传文件

       /// <summary>
        /// 批量上传文件
        /// </summary>
        /// <param name="f"></param>
        /// <returns></returns>
        public ActionResult Upload(HttpPostedFileBase f)
        {

            //检测年月文件夹是否存在
            string year = DateTime.Now.Year.ToString();
            string month = DateTime.Now.Month.ToString();
            string path = Server.MapPath("~/Upload/" + year + "-" + month);
            if (Directory.Exists(path) == false)
            {
                Directory.CreateDirectory(path);
            }

            try
            {
                var files = Request.Files;
                if (files.Count == 0)
                {
                    return Json(GetResult(false, "提示：没有要上传的文件！", null));
                }

                var i = 1;
                foreach (string file in files)//file是file文件的name
                {
                    //获取文件信息
                    var curFile = Request.Files[file];
                    if (curFile != null && curFile.ContentLength < 1)
                    {
                        continue;
                    }

                    //获取文件名
                    var fileName = Path.GetFileName(curFile.FileName);
                    if (fileName == null)
                    {
                        continue;
                    }
                    //文件后缀名
                    var filePostfixName = fileName.Substring(fileName.LastIndexOf('.'));
                    //新文件名
                    var newFileName = (DateTime.Now.ToString("yyyyMMddHHmmss") + i) + filePostfixName;
                    i++;
                    //拼凑地址
                    string filename = Path.Combine(path, newFileName);

                    //保存文件
                    curFile.SaveAs(filename);

                }
                return Json(GetResult(true, "上传成功！", null));
            }
            catch (Exception ex)
            {
                return Json(GetResult(false, "上传失败,错误信息：" + ex.Message, null));
            }

        }