Reporting Services 2008 - Anonymous Access

Question

Hello,
In SSRS 2005 I was able to grant anonymous access to my reports by changing the authentication mode for the Reporting Services virtual directory in IIS to Anonymous and then adding the 'account used for anonymous access' to the permissions on the appropriate Reporting Services directories (in report manager).
Now with SSRS 2008 there are no virtual directories in IIS.
I tried to follow the instructions given:
http://technet.microsoft.com/en-us/library/cc281310.aspx (Authentication Types in Reporting Services)
Which instructed me to use the custom AuthenticationType, and following the instructions here:
http://technet.microsoft.com/en-us/library/cc281383.aspx (How to: Configure Custom or Forms Authentication in Reporting Services)
which just got me an error:
The Authentication Extension threw an unexpected exception or returned a value that is not valid: . (rsAuthenticationExtensionError) Get Online Help
For more information about this error navigate to the report server on the local server machine, or enable remote errors
Any ideas on how to set up anonymous access to SSRS2008?
Thanks for any time and help!
-Tim

Answer 1

JC,
I check the solution on net and get following:
First create a class called ReportServerCredentials that implements the IReportServerCredentials interface.  You will need to import System.Net and Microsoft.Reporting.WebForms to this class.  Overload the New and GetFormsCredentials methods and the NetworkCredentials and ImpersonationUser properties.  Here's a class that I use:
Imports Microsoft.VisualBasic
Imports Microsoft.Reporting.WebForms
Imports System.Net
Public Class ReportServerCredentials
    Implements IReportServerCredentials
    Private _userName As String
    Private _password As String
    Private _domain As String
    Public Sub New(ByVal userName As String, ByVal password As String, ByVal domain As String)
        _userName = userName
        _password = password
        _domain = domain
    End Sub
    Public ReadOnly Property ImpersonationUser() As System.Security.Principal.WindowsIdentity Implements Microsoft.Reporting.WebForms.IReportServerCredentials.ImpersonationUser
        Get
            Return Nothing
        End Get
    End Property
    Public ReadOnly Property NetworkCredentials() As ICredentials Implements Microsoft.Reporting.WebForms.IReportServerCredentials.NetworkCredentials
        Get
            Return New NetworkCredential(_userName, _password, _domain)
        End Get
    End Property
    Public Function GetFormsCredentials(ByRef authCookie As System.Net.Cookie, ByRef userName As String, ByRef password As String, ByRef authority As String) As Boolean Implements Microsoft.Reporting.WebForms.IReportServerCredentials.GetFormsCredentials
        userName = _userName
        password = _password
        authority = _domain
        Return Nothing
    End Function
End Class
Next, in the OnLoad of your page with the ReportViewer control, create a new instance of your ReportServerCredentials (I use values stored in AppSettings).  Then assign your object to the ReportViewer control's ServerReport.ReportServerCredentials property. 
Dim cred As New ReportServerCredentials(ConfigurationManager.AppSettings("MyStoredUser"),_
    ConfigurationManager.AppSettings("MyStoredPassword"), _
    ConfigurationManager.AppSettings("MyStoredDomain"))
    MyReportViewerControl.ServerReport.ReportServerCredentials = cred
I try it but get following error
Compiler Error Message: BC30002: Type 'IReportServerCredentials' is not defined.
Do you think it is a possible way for Reporting Service 2008? if yes, what lead to the error? thanks in advance.