How to print a pdf in ASP.NET with iTextsharp

See more:

ASP.NET

PDF

itextsharp

print

Hello,
I'm trying to print a pdf. Actually I'm showing it to the user with a Response, and works fine. I would like to show even the print dialog (or printing directly), because I need to force the printing of 2 copies.

This is my code, but it doesn't work, nothing happens (after the response)!

TestPdf is a method inside an aspx page that is inside an IFrame in another page. The master page call the slave passing the bytearray of the pdf. Then in the IFrame the pdf is shown, but not the print dialog.
What's wrong?
Thank you in advance

What I have tried:

protected void TestPdf(byte[] fileStream)
        {
            var outputStream = new MemoryStream();
            var pdfReader = new iTextSharp.text.pdf.PdfReader(fileStream);
            var pdfStamper = new iTextSharp.text.pdf.PdfStamper(pdfReader, outputStream);
            pdfStamper.SetPageAction(iTextSharp.text.pdf.PdfWriter.PAGE_OPEN, new iTextSharp.text.pdf.PdfAction(iTextSharp.text.pdf.PdfAction.PRINTDIALOG), 1);
            var writer = pdfStamper.Writer;
            writer.AddJavaScript(GetAutoPrintJs());
            pdfStamper.Close();
            var content = outputStream.ToArray();
            outputStream.Close();
            Response.ContentType = "application/pdf";
            Response.BinaryWrite(content);
            Response.End();
            outputStream.Close();
            outputStream.Dispose();
        }
protected string GetAutoPrintJs()
        {
            var script = new StringBuilder();
            script.Append("var pp = getPrintParams();");
            script.Append("pp.interactive= pp.constants.interactionLevel.full;");
            script.Append("pp.NumCopies=eval(2);");
            script.Append("print(pp);");
            return script.ToString();
        }