how to suppress line in pdf if pagenumber > 1 by using vb.net code ?

Dear Experts ,

I am using following query to export my report in to pdf .

rpt.ExportToHttpResponse(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat, Response, False, "Quotation") ... I need to suppress line if page number > 1 . For ex if total pagecount is 3 , in first page alone I need to display line object .

If I generate report in RPT format then I can easily achieve this by following query

Dim currentpagenumber AsString = BL.ViewInfo.PageNumber.ToString           

Dim nPages AsInteger = rpt.FormatEngine.GetLastPageNumber(New CrystalDecisions.Shared.ReportPageRequestContext)

rpt.ReportDefinition.ReportObjects.Item(i). obj.ObjectFormat.EnableSuppress = True ,

But same thing is not working when generate from PDF ,

Is it possible to suppress line in pdf if pagenumber > 1.