FormsAuthentication.SetAuthCookie(person.LoginName,false);

是不足以填充’HttpContext.Current.User’,它需要运行以下方法：

FormsAuthentication.RedirectFromLoginPage("...");

问题在于,正如我所提到的,loggin表单使用ajax表单,并使用json获取响应,因此无法重定向.

我怎么能填写’HttpContext.Current.User’？

谢谢.

更新：

这是注册方法：

[HttpPost]
        public ActionResult Register(Person person)
        {
            var q = da.Persons.Where(x => x.LoginName == person.LoginName.ToLower()).FirstOrDefault();

            if (q != null)
            {
                ModelState.AddModelError("","Username is repettive,try other one");

                return Json(new object[] { false,this.RenderPartialViewToString("RegisterControl",person) });
            }
            else
            {
                if (person.LoginName.ToLower() == "admin")
                {
                    person.IsAdmin = true;
                    person.IsActive = true;
                }

                da.Persons.Add(person);

                da.SaveChanges();

                FormsAuthentication.SetAuthCookie(person.LoginName,false);
return Json(new object[] { true,"You have registered successfully!" });

}

}

// in login function
FormsAuthentication.SetAuthCookie(model.UserName,model.RememberMe);
AuthenticateThisRequest();

private void AuthenticateThisRequest()
{
    //NOTE:  if the user is already logged in (e.g. under a different user account)
    //       then this will NOT reset the identity information.  Be aware of this if
    //       you allow already-logged in users to "re-login" as different accounts 
    //       without first logging out.
    if (HttpContext.User.Identity.IsAuthenticated) return;

    var name = FormsAuthentication.FormsCookieName;
    var cookie = Response.Cookies[name]; 
    if (cookie != null)
    {   
        var ticket = FormsAuthentication.Decrypt(cookie.Value);
        if (ticket != null && !ticket.Expired)
        {
            string[] roles = (ticket.UserData as string ?? "").Split(',');
            HttpContext.User = new GenericPrincipal(new FormsIdentity(ticket),roles);
        }
    }
}