public ActionResult LoginToSystem(string argUserName,string argPwd)
 {
     
     var ajaxResult = new AjaxResult();
     if (string.IsNullOrEmpty(argUserName) || string.IsNullOrEmpty(argPwd))
     {
         ajaxResult.Success = false;
         ajaxResult.Message = "用户名,密码不能为空!";
     }
     else
     {
         var repository = new DataRepository();
         if (!repository.Login(argUserName, argPwd))
         {
             ajaxResult.Success = false;
             ajaxResult.Message = "用户名或密码错误!";
         }
         else
         {
             ajaxResult.Success = true;
         }
     }
     return Json(ajaxResult);
 }