ASP.NET Role Manager Feature Has Not Been Enabled - asp.net

Question

I'm trying to create a routine in my asp.net's main page that will see if the current user is a member of a Windows domain group. The site is hosted in IIS and is visible through our intranet.
GlenFerrieLive listed this code (which I'd like to use) in an earlier post:
UserName = System.Environment.UserName
If Roles.IsUserInRole(UserName, "MyDomain\MyGroup") Then
Dim UserExists As Boolean = True
End If
When trying that code, I got the above-mentioned error. So I plugged in the roleManager tag in my Web.config like so:
<roleManager enabled="true" cacheRolesInCookie="true" defaultProvider="ActiveDirectoryMembershipProvider" cookieName=".ASPXROLES" cookiePath="/" cookieTimeout="480" cookieRequireSSL="false" cookieSlidingExpiration="true" createPersistentCookie="false" cookieProtection="All" />
Problem is, now I'm getting the configuration error 'Default Role Provider could not be found'.
How can I get around this? I just need to see if the current user exists in a specific domain group.
Any help would be greatly appreciated.
Thanks,
Jason

Answer 1

Look into this page:http://msdn.microsoft.com/en-us/library/ff648345.aspx
You need something like this in your webconfig specifying where the default role provider points to
<connectionStrings>
<add name="ADConnectionString"
connectionString=
"LDAP://domain.testing.com/CN=Users,DC=domain,DC=testing,DC=com" />
</connectionStrings>
<system.web>
...
<membership defaultProvider="MembershipADProvider">
<providers>
<add
name="MembershipADProvider"
type="System.Web.Security.ActiveDirectoryMembershipProvider, System.Web,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
connectionStringName="ADConnectionString"
connectionUsername="<domainName>\administrator"
connectionPassword="password"/>
</providers>
</membership>
...
</system.web>

Answer 2

I ended up using this:
Private Function ValidateActiveDirectoryLogin(ByVal Domain As String, ByVal Username As String, ByVal Password As String) As Boolean
Dim Success As Boolean = False
Dim Entry As New System.DirectoryServices.DirectoryEntry("LDAP://" & Domain, Username, Password)
Dim Searcher As New System.DirectoryServices.DirectorySearcher(Entry)
Searcher.SearchScope = DirectoryServices.SearchScope.OneLevel
Try
Dim Results As System.DirectoryServices.SearchResult = Searcher.FindOne
Success = Not (Results Is Nothing)
Catch
Success = False
End Try
Return Success
End Function
Worked like a charm when this was in my web.config:
<authentication mode="Windows"/>
<roleManager enabled="true" cacheRolesInCookie="true" defaultProvider="AspNetWindowsTokenRoleProvider" cookieName=".ASPXROLES" cookiePath="/" cookieTimeout="480" cookieRequireSSL="false" cookieSlidingExpiration="true" createPersistentCookie="false" cookieProtection="All" />