asp.net-mvc-5 – MVC 5表单身份验证为User.Identity.Name返回nu

我的webconfig,

<system.web>        
    <authentication mode="Forms">
          <forms cookieless="UseCookies" defaultUrl="~/" loginUrl="~/user/signin"  name="MYAPPWeb" timeout="21600" slidingExpiration="true"/>
        </authentication>

UserController的,

[HttpPost]
        [AllowAnonymous]
        [ValidateAntiForgeryToken]
        public ActionResult SignIn(SignInViewModel user)
        {

                        UserDTO userObj;
                        using (var services = new ServiceFactory())
                        {                            
                            userObj = services.UserManagement.ValidateLoginDetails(ConfigHelper.EnvironmentString,user.TenantName,user.Username,user.Password);
                        }
                                string userID = userObj.UserID.ToString();
                                //FormsAuthentication.RedirectFromLoginPage(userID,user.RememberMe);
                                FormsAuthentication.SetAuthCookie(userID.ToString(),true);

                                FormsAuthentication.RedirectFromLoginPage(userID,false); //DO NOT REMEMBER ME

}

HomeController(默认页面)

public ActionResult Index()
        {

            bool x = User.Identity.IsAuthenticated; //false?
            string y = User.Identity.Name; //null?

return View();
}

它看起来很直接,我错过了什么？请帮忙！

注意：
??当我创建项目时,我选择了Windows身份验证.它创建了一些与Owin authenticnticaiton相关的配置文件(startup.auth.cs).我删除了它们并添加了上面的appsetting条目,因为它需要停止加载Owin程序集.

<add key="owin:AutomaticAppStartup" value="false"/>