mvc上传文件

前台代码：

 <form action="/User/ImpExcel" method="post" enctype="multipart/form-data" >
        <span class="uploadBtn small">
             <input  type="file" id="upFiles" name="upFiles"><span>上传文件</span>
        </span>
        <span class="ftips">（上传前，请关闭文件。）</span>
        <input type="submit" value="确认上传" class="btn-sure" id="Btn_submit">
 </form>

后台代码：

      
  public ActionResult ImpExcel(string str)
        {
            int iRusult = 0;
            if (Request.Files["upFiles"] != null) // If uploaded synchronously
            {
                //判断文件大小
                if (Request.Files["upFiles"].ContentLength < 1024 * 1024 *10)
                {
                    //判断文件类型
                    string strType = Request.Files["upFiles"].ContentType;
                   string fileType= Path.GetExtension(Request.Files["upFiles"].FileName).ToUpper();
                   // if (strType == "application/vnd.ms-excel" || strType == "application/kset")
                   if (fileType == ".XLS")
                    {                     
                  
                        //上传文件
                        string photo_guid = _fileStore.SaveUploadedFile(Request.Files["upFiles"]);                     
                      
                    }
                   
                }
                
            }           
        }