MVC3 - Access User context in Controller base class

I have the following code in a view

@User.Identity.Name

Works fine.

The same code in a custom controller base class doesn't work. The User object is null

public class AdminBaseController : Controller
    {
        public AdminBaseController()
        {    
            string userId = User.Identity.Name;                
             //if(!AnAdmin)
                 //redirec开发者_运维问答t to UnauthorizedPage

I want to use this base class in place of System.Web.MVC.Controller as the base for all my Administration screens. This way I can redirect anybody that is not an admin (NTLM authentication).

Why the nulls? How do I get to my context? (HttpContext and something called ControllerContext are null too)

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After some tinkering, things are null in the Controller constructors. The Action Methods work fine. Question still stands, but it appears I need help choosing an alternative implementation.

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You should use Authorization filter, ASP.NET MVC Authorization. Also check Understanding Action Filters.

Or you can override Initialize method on Controller, User object will be initialized.

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I just tried to access the 'Name'-property in a function within a controller class. That wasn't an issue and it wasn't null.

My best guess is that you can't access this object in the constructor of a controller.