Context.User.Identity.Name在MVC 4中返回null

Question

I'm setting the forms authentication cookie like this below

FormsAuthentication.SetAuthCookie("test", true);

and when i check if its set it returns null...

Context.User.Identity.Name

any ideas why this is happening? thanks

Answer 1

You should always redirect after setting a forms authentication cookie:

public ActionResult SomeAction()
{
    FormsAuthentication.SetAuthCookie("test", true);    
    return RedirectToAction("FooBar");
}

It's only in the subsequent action you are redirecting to that you will get the User.Identity.Name being properly initialized. The reason for that is pretty simple: the User.Identity.Name property is initialized from the Request cookies (aka incoming cookies) whereas the FormsAuthentication.SetAuthCookie is setting the forms authentication to the response (aka emitting a cookie) so that on subsequent requests this cookie will be sent in the request.