ReportViewer Credentials on SQL server 2008 R2

While migrating a project from VS 2005 to VS2010 and to a new version of SQL server i Came across an issue where we need to pass access credentials to the report viewer before showing any report. following code snippet help to resolve exception which will arise if you do not provide reporting server credentials.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Security.Principal;
using System.Net;

///

/// Summary description for CustomReportCredentials
///

[Serializable]
public class CustomReportCredentials : Microsoft.Reporting.WebForms.IReportServerCredentials
{

// local variable for network credential.
private string _UserName;
private string _PassWord;
private string _DomainName;
public CustomReportCredentials(string UserName, string PassWord, string DomainName)
{
_UserName = UserName;
_PassWord = PassWord;
_DomainName = DomainName;
}
public WindowsIdentity ImpersonationUser
{
get
{
return null; // not use ImpersonationUser
}
}
public ICredentials NetworkCredentials
{
get
{

// use NetworkCredentials
return new NetworkCredential(_UserName, _PassWord, _DomainName);
}
}
public bool GetFormsCredentials(out Cookie authCookie, out string user, out string password, out string authority)
{

// not use FormsCredentials unless you have implements a custom autentication.
authCookie = null;
user = password = authority = null;
return false;
}

}