Forms based roles assignment problem

From: Rob Heckart (rheckart@nospam.cssiinc.com)
Date: 09/25/02 

From: "Rob Heckart" <rheckart@nospam.cssiinc.com>
Date: Wed, 25 Sep 2002 15:32:20 -0400

Hi,

I've got forms based authentication going, but I am trying to assign a role
to a user. Here's the code, pretty much straight from the MS KB article
Q306238:

Imports System.Web.Security
Imports System.Security.Principal

...

' Add the user as an admin if they are one
If .Parameters("@IsAdmin").Value And _
     (Not (HttpContext.Current.User Is Nothing)) Then
     If aUserRoles.GetUpperBound(0) = -1 Then
          ReDim Preserve aUserRoles(aUserRoles.GetUpperBound(0) + 1)
     End If

     aUserRoles(aUserRoles.GetUpperBound(0)) = "Admin"

     If (Not (HttpContext.Current.User Is Nothing)) Then
        If HttpContext.Current.User.Identity.AuthenticationType = "Forms"
Then

                Dim ID As System.Web.Security.FormsIdentity
                ID = HttpContext.Current.User.Identity

                HttpContext.Current.User = New
System.Security.Principal.GenericPrincipal(ID, aUserRoles)
        End If
     End If
End If

In my Web.Config file in the root, I have <authentication mode="Forms"> set.
When I run the code, the
HttpContext.Current.User.Identity.AuthenticationType returns blank. When I
comment out that line, the ID = HttpContext.Current.User.Identity comes
back with a cast error.

How is the AuthenticationType set up for the web app so that this works? Do
I need to set something special up in global.asax, web.config or the home
page?

Thanks,

Rob Heckart

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