Hi Mark,
It doesn't work means, my code neither can warkmark the existing
digitally signed pdf nor can add any new text to it. After the code is executed
the digitally signed pdf remains as it was before executing the code.
I will really appreciate any help.
Thanks,
Kiran
--- On Thu, 4/28/11, Mark Storer <[email protected]> wrote:
From: Mark Storer <[email protected]>
Subject: Re: [iText-questions] How to watermark a digitally signed
pdfprogramatically
To: "Post all your questions about iText here"
<[email protected]>
Date: Thursday, April 28, 2011, 9:53 AM
What do you mean by "it doesn't work". Does it produce a PDF? Is it valid?
Is the signature invalid (you cannot get around that)?
--Mark Storer
Senior Software Engineer
Cardiff.com
import legalese.Disclaimer;
Disclaimer<Cardiff> DisCard = null;
From: Kiran Nepal [mailto:[email protected]]
Sent: Thursday, April 28, 2011 9:27 AM
To: [email protected]
Subject: [iText-questions] How to watermark a digitally signed
pdfprogramatically
Hi Friends,
I urgently need to add watermark on a digitally signed pdf programatically
using C#. I can watermark normal pdf using the code below but, it doesn't work
for a pdf that with digital signature. Can you please help me to solve this
issue.
The following code works and adds watermark on a normal pdf and doesn't work
for digitally signed pdf
public void AddWatermarkText(string sourceFile, string outputFile,
string watermarkText, iTextSharp.text.pdf.BaseFont watermarkFont, float
watermarkFontSize, iTextSharp.text.Color watermarkFontColor, float
watermarkFontOpacity, float watermarkRotation,string waterMarkWord)
{
iTextSharp.text.pdf.PdfReader reader = null;
iTextSharp.text.pdf.PdfStamper stamper = null;
iTextSharp.text.pdf.PdfGState gstate = null;
iTextSharp.text.pdf.PdfContentByte underContent = null;
iTextSharp.text.Rectangle rect = null;
int pageCount = 0;
try
{
{
reader = new iTextSharp.text.pdf.PdfReader(sourceFile);
rect = reader.GetPageSizeWithRotation(1);
//stamper = new iTextSharp.text.pdf.PdfStamper(reader, new
System.IO.FileStream(outputFile, System.IO.FileMode.Create));//original working
but not for signed certificate
stamper = new PdfStamper(reader, new
System.IO.FileStream(outputFile, System.IO.FileMode.CreateNew), '\0', true);
//Runs but doesn't work for signed pdf
//PdfStamper stamp = new PdfStamper(reader, new
BinaryReader("c:\\my_dir\\" + SignedPdf + "-watermarked.pdf"), '\0', true);
//Google for writing in Signed Pdf
if (watermarkFont == null)
{
watermarkFont =
iTextSharp.text.pdf.BaseFont.CreateFont(iTextSharp.text.pdf.BaseFont.HELVETICA,
iTextSharp.text.pdf.BaseFont.CP1252,
iTextSharp.text.pdf.BaseFont.NOT_EMBEDDED);
}
if (watermarkFontColor == null)
{
watermarkFontColor = iTextSharp.text.Color.BLUE;
}
gstate = new iTextSharp.text.pdf.PdfGState();
gstate.FillOpacity = watermarkFontOpacity;
gstate.StrokeOpacity = watermarkFontOpacity;
pageCount = reader.NumberOfPages;
for (int i = 1; i <= pageCount; i++)
{
//underContent = stamper.GetUnderContent(1); //If we
need just one page, comment for loop and pagecount and write (1) instead of i
underContent = stamper.GetUnderContent(i); //write uder
the other text///GetOverContent for above the existing page
//_with1 = underContent;
underContent.SaveState();
underContent.SetGState(gstate);
underContent.SetColorFill(watermarkFontColor);
underContent.BeginText();
underContent.SetFontAndSize(watermarkFont,
watermarkFontSize);
underContent.SetTextMatrix(30, 30);
underContent.ShowTextAligned(iTextSharp.text.Element.ALIGN_CENTER,
watermarkText, rect.Width / 2, rect.Height / 2, watermarkRotation);
underContent.EndText();
underContent.RestoreState();
}
}
stamper.Close();
reader.Close();
}
catch (Exception ex)
{
throw ex;
}
}
Thanks
Kiran
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iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
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Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php------------------------------------------------------------------------------
WhatsUp Gold - Download Free Network Management Software
The most intuitive, comprehensive, and cost-effective network
management toolset available today. Delivers lowest initial
acquisition cost and overall TCO of any competing solution.
http://p.sf.net/sfu/whatsupgold-sd
_______________________________________________
iText-questions mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/itext-questions
iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
