public IActionResult Login([FromForm] LoginParameter parameter) { User user = UserServer.GetLoginResult(parameter.Mail, parameter.Password, _usercontext); if (user == null) { ViewData["info"] = "账号或密码错误"; ViewData["Mail"] = parameter.Mail; ViewData["Pwd"] = parameter.Password; return(View()); } else { Response.Cookies.Delete("SessionCode"); Response.Cookies.Append("SessionCode", user.SessionCode); return(RedirectToAction("Index", "Main")); } }