ReportViewer control using ReportServerCredentials.NetworkCredentials - asp.net-mvc-2

Question

I'm using the ReportViewer control to access a SSRS 2008 Report from a VS2010 ASP.NET MVC 2 Web Application deployed on IIS7 with the following setup:
Forms Authentication and Anonymous Authentication enabled
ASP.NET Impersonation disabled
App pool identity configured to use local user account that has access rights to specific folders on the server required by the application
The webserver is not part of the domain but the SSRS server is on the domain
Since I need to use separate credentials to access SSRS Reports, I have implemented IReportServerCredentials as explained here:
http://msdn.microsoft.com/en-us/library/microsoft.reporting.webforms.ireportservercredentials(v=vs.100).aspx
The problem I'm having is it always goes to IReportServerCredentials.ImpersonationUser instead of IReportServerCredentials.NetworkCredentials where I need it to go because I'm retrieving the required credentials off web.config.
Maybe I'm missing something simple here but I've tried different combination of these settings and have had no luck. Any pointers on how I could get this working would be much appreciated!
My code:
[Serializable]
public sealed class MyReportServerCredentials :
IReportServerCredentials
{
public WindowsIdentity ImpersonationUser
{
get
{
// Use the default Windows user. Credentials will be
// provided by the NetworkCredentials property.
return null;
}
}
public ICredentials NetworkCredentials
{
get
{
// Read the user information from the Web.config file.
// By reading the information on demand instead of
// storing it, the credentials will not be stored in
// session, reducing the vulnerable surface area to the
// Web.config file, which can be secured with an ACL.
// User name
string userName =
ConfigurationManager.AppSettings
["MyReportViewerUser"];
if (string.IsNullOrEmpty(userName))
throw new Exception(
"Missing user name from web.config file");
// Password
string password =
ConfigurationManager.AppSettings
["MyReportViewerPassword"];
if (string.IsNullOrEmpty(password))
throw new Exception(
"Missing password from web.config file");
// Domain
string domain =
ConfigurationManager.AppSettings
["MyReportViewerDomain"];
if (string.IsNullOrEmpty(domain))
throw new Exception(
"Missing domain from web.config file");
return new NetworkCredential(userName, password, domain);
}
}
public bool GetFormsCredentials(out Cookie authCookie,
out string userName, out string password,
out string authority)
{
authCookie = null;
userName = null;
password = null;
authority = null;
// Not using form credentials
return false;
}
}
this.MyReportView.ServerReport.ReportServerCredentials = new MyReportServerCredentials();
Thanks

Answer 1

I implement this same class on every reporting page I need and it works correctly.
Check your web.config file.
I have:
<configuration>
<system.web>
<authentication mode="Windows"/>
</configuration>
</system.web>
Yes. Authentication mode "Windows".
However, I have worked also using Forms Authentication.
So I think this is more a permissions issue.
Check this post:
UAC Windows 7 (Proffesional) 64 bit and SSRS 2008 R2 (10.50.1617) 64 bit
Also this post:
Reporting Services 2008: asking for username and password