Redirect Unauthorized Page Access in MVC to Custom View

Question

I have an MVC website in which access is based on various Roles. Once a user logs into the system they can see navigation to the pages for which they are authorized. However

Answer 1

With following change it is working

public class CustomAuthorize : AuthorizeAttribute
{
    protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
    {
        //filterContext.Result = new HttpUnauthorizedResult(); // Try this but i'm not sure
          filterContext.Result = new RedirectResult("~/Home/Unauthorized");
    }

    public override void OnAuthorization(AuthorizationContext filterContext)
    {
        if (this.AuthorizeCore(filterContext.HttpContext))
        {
            base.OnAuthorization(filterContext);
        }
        else
        {
            this.HandleUnauthorizedRequest(filterContext);
        }
    }

}

And then applying on Controller or Action as below:

[CustomAuthorize(Roles = "Admin")]

With above approach I need to revisit all the controller/actions and change the Authorized attribute! Also some testing will be needed.

I am still not sure why Web.Config route not working as same has been explained in MVC Documentation. May be something has changed in MVC 4!