关于asp.net：如何从DMZ中的ReportViewer控件查看SQL Server 2005 Reporting Services报表

ViewCostReport.OnClientClick ="window.open('" + Report.GetProjectCostURL(_PromotionID) +"','ProjectCost','resizable=yes')";

public class ReportCredentials : Microsoft.Reporting.WebForms.IReportServerCredentials
{
    string _userName, _password, _domain;
    public ReportCredentials(string userName, string password, string domain)
    {
        _userName = userName;
        _password = password;
        _domain = domain;
    }

    public System.Security.Principal.WindowsIdentity ImpersonationUser
    {
        get
        {
            return null;
        }
    }

    public System.Net.ICredentials NetworkCredentials
    {
        get
        {
            return new System.Net.NetworkCredential(_userName, _password, _domain);
        }
    }

    public bool GetFormsCredentials(out System.Net.Cookie authCoki, out string userName, out string password, out string authority)
    {
        userName = _userName;
        password = _password;
        authority = _domain;
        authCoki = new System.Net.Cookie(".ASPXAUTH",".ASPXAUTH","/","Domain");
        return true;
    }
}

protected void btnReport_Click(object sender, EventArgs e)
{
    ReportParameter[] parm = new ReportParameter[1];
    parm[0] =new ReportParameter("PromotionID",_PromotionID);
    ReportViewer.ShowCredentialPrompts = false;
    ReportViewer.ServerReport.ReportServerCredentials = new ReportCredentials("Username","Password","Domain");
    ReportViewer.ProcessingMode = Microsoft.Reporting.WebForms.ProcessingMode.Remote;
    ReportViewer.ServerReport.ReportServerUrl = new System.Uri("http://ReportServer/ReportServer");
    ReportViewer.ServerReport.ReportPath ="/ReportFolder/ReportName";
    ReportViewer.ServerReport.SetParameters(parm);
    ReportViewer.ServerReport.Refresh();
}