asp.net-mvc – User.Identity.IsAuthenticated在设置cookie并进行验证后返回false

我对MVC4用户授权有问题。

System.Web.Security.Membership.ValidateUser返回true。
然后它到达FormsAuthentication.SetAuthCookie，我在浏览器中看到一个cookie。
然后User.Identity.IsAuthenticated由于某些原因仍然评估为false。
User.Identity.IsAuthenticated在重定向后仍然为false，并保持为false。

[AllowAnonymous]
[HttpPost]
public ActionResult Login(LoginModel model,string returnUrl)
{
    if (ModelState.IsValid)
    {
        if (System.Web.Security.Membership.ValidateUser(model.UserName,model.Password))
        {
            FormsAuthentication.SetAuthCookie(model.UserName,model.RememberMe);
            if (Url.IsLocalUrl(returnUrl))
            {
                return Redirect(returnUrl);
            }
            else
            {
                return RedirectToAction("Index","Home");
            }
        }
        else
        {
            ModelState.AddModelError("","The user name or password provided is incorrect.");
        }
    }

    // If we got this far,something Failed,redisplay form
    return View(model);
}

解决方法

在调用FormsAuthentication.SetAuthCookie()之后，下一个请求之前，User.Identity.IsAuthenticated不会被设置为true。

见http://msdn.microsoft.com/en-us/library/twk5762b.aspx

The SetAuthCookie method adds a forms-authentication ticket to either the cookies collection,or to the URL if CookiesSupported is false. The forms-authentication ticket supplies forms-authentication information to the next request made by the browser.