public ActionResult CheckLogin() { string validateCode = Session["validateCode"] == null ? string.Empty : Session["validateCode"].ToString(); if (string.IsNullOrEmpty(validateCode)) { return(Content("no:验证码错误!")); } Session["validateCode"] = null; string requestCode = Request["vCode"]; if (!requestCode.Equals(validateCode, StringComparison.InvariantCultureIgnoreCase)) { return(Content("no:验证码错误!!")); } string userName = Request["LoginCode"]; string userPwd = Request["LoginPwd"]; BLL.UserInfoService UserInfoService = new BLL.UserInfoService(); T_UserInfo userInfo = UserInfoService.GetUserInfoModel(userName, userPwd); if (userInfo != null) { return(Content("ok:登录成功!!")); } else { return(Content("no:用户名密码错误")); } }