public ActionResult UploadFiles(string fileurl)
{
   //fileurl 是要上传的文件的路径，包括文件名
   //前台页面没有fileupload控件，也就是说给你一个文件路径，能否上传到服务器？
   ？？？？？How To DO?
}

        /// <summary>
        /// 基本设置处理
        /// </summary>
        /// <returns></returns>
        [WebFilter]
        [UsersChoolFilter]
        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult SchoolConfig(FormCollection form, [color=#FF0000]HttpPostedFileBase NewTrainSchoolLogo[/color], HttpPostedFileBase NewTrainSchoolImg)
        {
            GetAllModel();
            UpdateModel<TrainSchool>(_TSModel);//2009-8-29
            _TSModel.TrainSchoolName = Include.StrFilter(_TSModel.TrainSchoolName);
            _TSModel.TrainKeyWords = Include.StrFilter(_TSModel.TrainKeyWords);
            _TSModel.TrainSchoolCount = Include.StrFilter(_TSModel.TrainSchoolCount);
            //////////////////////////////上传图片处理///////////////////////////////////////
            [color=#FF0000]string NewLogoStr = CheckImg(NewTrainSchoolLogo,"logo");
            string NewImgStr = CheckImg(NewTrainSchoolImg, "Img");
            if (NewLogoStr != "") _TSModel.TrainSchoolLogo = NewLogoStr;
            if (NewImgStr != "") _TSModel.TrainSchoolImg = NewImgStr;[/color]            //////////////////////////////上传图片处理///////////////////////////////////////
            _TSManage.Update(_TSModel);
            return Redirect("SchoolConfig");
        }


        /// <summary>
        /// 上传图片处理
         /// </summary>
        /// <param name="ImgType"></param>
        /// <returns></returns>
        public string CheckImg(HttpPostedFileBase Files,string NameStr) 
        {
            if (Files == null) return "";

            string FileType = Files.FileName.Substring(Files.FileName.LastIndexOf(".") + 1);

            if (FileType == "gif" || FileType == "GIF" || FileType == "jpg" || FileType == "JPG" || FileType == "png" || FileType == "PNG")
            {
                //新的文件名
                string ImgName = NameStr + DateTime.Now.ToString("yyyyMMddHHmmssfff")+"."+FileType;
                Files.SaveAs(Server.MapPath("/schoolUp/"+ImgName));
                return ImgName;
            }
            else
            {
                return "";
            }
        }

------解决方案--------------------
<input type="file" id="fileImage" name="fileImage" />&nbsp;&nbsp;
     <input type="submit" value="Upload" />


      public ActionResult Index()
       {
           return View();
       }
     [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Index(FormCollection collection)
       {
            if (Request.Files.Count == 0)
            {
               return View();
           }
           var c = Request.Files[0];
           if (c != null && c.ContentLength > 0)
           {
               int lastSlashIndex = c.FileName.LastIndexOf("\\");
               string fileName = c.FileName.Substring(lastSlashIndex + 1, c.FileName.Length - lastSlashIndex - 1);
               fileName = Path.Combine(CommonUtility.DocImagePath, fileName);
               c.SaveAs(fileName);
           }
          return View();
       }
  MVC 上传