internal static void RegisterHiddenItem(ReportItem reportItem, PageContext pageContext, bool useForPageHFEval, Interactivity interactivity)
        {
            if (reportItem == null)
            {
                return;
            }
            bool flag = false;

            if (useForPageHFEval)
            {
                flag = HeaderFooterEval.AddToCurrentPage(reportItem);
            }
            if (interactivity != null && !interactivity.RegisterHiddenItem(reportItem, pageContext))
            {
                interactivity = null;
            }
            if (!flag && interactivity == null)
            {
                return;
            }
            if (reportItem is Microsoft.ReportingServices.OnDemandReportRendering.TextBox)
            {
                if (flag)
                {
                    Microsoft.ReportingServices.OnDemandReportRendering.TextBox textBox = reportItem as Microsoft.ReportingServices.OnDemandReportRendering.TextBox;
                    if (textBox != null)
                    {
                        ((TextBoxInstance)textBox.Instance).AddToCurrentPage();
                    }
                }
            }
            else if (reportItem is Microsoft.ReportingServices.OnDemandReportRendering.Rectangle)
            {
                RegisterHiddenItem(((Microsoft.ReportingServices.OnDemandReportRendering.Rectangle)reportItem).ReportItemCollection, pageContext, flag, interactivity);
            }
            else if (reportItem is Microsoft.ReportingServices.OnDemandReportRendering.SubReport)
            {
                if (interactivity == null)
                {
                    return;
                }
                Microsoft.ReportingServices.OnDemandReportRendering.SubReport subReport = (Microsoft.ReportingServices.OnDemandReportRendering.SubReport)reportItem;
                SubReportInstance subReportInstance = (SubReportInstance)subReport.Instance;
                if (!subReportInstance.ProcessedWithError && !subReportInstance.NoRows)
                {
                    for (int i = 0; i < subReport.Report.ReportSections.Count; i++)
                    {
                        RegisterHiddenItem(subReport.Report.ReportSections[i].Body.ReportItemCollection, pageContext, useForPageHFEval: false, interactivity);
                    }
                }
            }
            else if (reportItem is Microsoft.ReportingServices.OnDemandReportRendering.Tablix)
            {
                RegisterHiddenItem((Microsoft.ReportingServices.OnDemandReportRendering.Tablix)reportItem, pageContext, flag, interactivity);
            }
        }
 private static void RegisterHiddenItem(Microsoft.ReportingServices.OnDemandReportRendering.Tablix tablix, PageContext pageContext, bool useForPageHFEval, Interactivity interactivity)
 {
     if (tablix != null)
     {
         bool flag = false;
         if (useForPageHFEval)
         {
             flag = HeaderFooterEval.AddToCurrentPage(tablix);
         }
         if (flag || interactivity != null)
         {
             TablixInstance tablixInstance = (TablixInstance)tablix.Instance;
             WalkTablix.AddMembersToCurrentPage(tablix, null, -1, WalkTablix.State.ColMembers, createDetail: false, tablixInstance.NoRows, pageContext, flag, interactivity);
             WalkTablix.AddMembersToCurrentPage(tablix, null, 0, WalkTablix.State.RowMembers, createDetail: true, tablixInstance.NoRows, pageContext, flag, interactivity);
         }
     }
 }