public string Index(string userName, string pwd)
        {
            string result = _ul.ProcessLogin(userName, pwd);

            if (result == "登陆成功!")
            {
                var userInfo = _ul.GeUserManagement(userName);
                //登陆成功:将登录信息写入cookie
                var cm = CookiesManager <V_User_Information> .GetInstance();

                cm.Add(CostCookies.COOKIES_KEY_LOGIN, userInfo, cm.Hour * 24);//将cookie保存24小时
                //存入操作日志表
                string logData = JsonHelper.ModelToJson(userInfo);
                _ll.SaveLog(14, 0, userName, "", logData);
                return("ok");
            }
            return(result);
        }