Open a crystal report with Response.write-> with a number

Question

User-1578974752 posted

Dim disk As DiskFileDestinationOptions = New DiskFileDestinationOptions()

disk.DiskFileName = String.Format("C:\inetpub\wwwroot\ABC\ABC\Reports\ADV\ADVReport{0}.pdf", Convert.ToString(Bsearch.Text))

exp.ExportDestinationOptions = disk

exp.ExportFormatOptions = New PdfRtfWordFormatOptions()

rptDoc.Export(exp)

Here I can ,insert the report in to the above folder with number ADVReportReport145678

I want to write the report on clicking button.Below append header is showing correctly but how can I open ADVReportReport145678 (The number is from the textbox ie Bsearch.Text)

 Dim filePath As String

        Response.AppendHeader("Content-Disposition", ("attachment; filename=" + Path.GetFileName(String.Format("C:\inetpub\wwwroot\ABC\ABC\Reports\ADV\ADVReport.pdf", Convert.ToString(Bsearch.Text)))))

        Response.WriteFile()

What to type inside Response.WriteFile()  . Appreciate the Help