iTextSharp.text.pdf.PdfStamper.SetPageAction C# (CSharp) Метод

        public void SetPageAction(PdfName actionType, PdfAction action, int page)
        {
            stamper.SetPageAction(actionType, action, page);
        }

 // ---------------------------------------------------------------------------
 /**
  * Manipulates a PDF file src with the file dest as result (localhost)
  * @param src the original PDF
  */
 public byte[] ManipulatePdf(byte[] src)
 {
     // Create the reader
     PdfReader reader = new PdfReader(src);
     int n = reader.NumberOfPages;
     using (MemoryStream ms = new MemoryStream())
     {
         // Create the stamper
         using (PdfStamper stamper = new PdfStamper(reader, ms))
         {
             // Get the writer (to add actions and annotations)
             PdfWriter writer = stamper.Writer;
             PdfAction action = PdfAction.GotoLocalPage(2,
               new PdfDestination(PdfDestination.FIT), writer
             );
             writer.SetOpenAction(action);
             action = PdfAction.JavaScript(
               "app.alert('Think before you print');", writer
             );
             writer.SetAdditionalAction(PdfWriter.WILL_PRINT, action);
             action = PdfAction.JavaScript(
               "app.alert('Think again next time!');", writer
             );
             writer.SetAdditionalAction(PdfWriter.DID_PRINT, action);
             action = PdfAction.JavaScript(
               "app.alert('We hope you enjoy the festival');", writer
             );
             writer.SetAdditionalAction(PdfWriter.DOCUMENT_CLOSE, action);
             action = PdfAction.JavaScript(
               "app.alert('This day is reserved for people with an accreditation "
               + "or an invitation.');",
               writer
             );
             stamper.SetPageAction(PdfWriter.PAGE_OPEN, action, 1);
             action = PdfAction.JavaScript(
               "app.alert('You can buy tickets for all the other days');", writer
             );
             stamper.SetPageAction(PdfWriter.PAGE_CLOSE, action, 1);
         }
         return ms.ToArray();
     }
 }