public IActionResult Login()
        {
            string strUserName = Request.Form["username"];
            string strPassWord = Request.Form["password"];

            //验证用户
            if (string.IsNullOrEmpty(strUserName))
            {
                tip.Message = "请输入用户名!";
                return(Json(tip));
            }
            if (string.IsNullOrEmpty(strPassWord))
            {
                tip.Message = "请输入密码!";
                return(Json(tip));
            }
            if (string.IsNullOrEmpty(strPassWord) || Utils.GetStringLength(strPassWord) < 5)
            {
                tip.Message = "登录密码不能为空或者长度小于5!";
                return(Json(tip));
            }
            //执行登录操作
            var loginResult = _systemService.AdminLogin(strUserName, strPassWord);

            if (string.IsNullOrEmpty(loginResult.Message))
            {
                SignIn(loginResult);
                tip.Status    = JsonTip.SUCCESS;
                tip.Message   = "登录成功";
                tip.ReturnUrl = "/";
                return(Json(tip));
            }
            else
            {
                tip.Message = "用户名或者密码错误!请重新登录!";
                return(Json(tip));
            }
        }