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Setting the mstream pointer to zero before reading will help.

Paulo

----- Original Message ----- 
From: "Paul S. Kemp" <paul (at) kbtech.co.uk>
To: <itext-questions (at) lists.sourceforge.net>
Sent: Monday, December 04, 2006 5:08 PM
Subject: [iText-questions] (no subject)


Hi,



I have a memorystream that contains a pdf document that's been amended.
I now want to place this into a pdfwriter to make some other amendments,
but i keep getting an error, so i want to check i can do this.



I first load in a PDF and then update some form fields and store that in
a memory stream. I then open a PDF writer and pdfreader, the pdfreader
points at the memorystream i want to load in and add some more content
such as a table etc,



How can i achieve this, also is this the best way of achiveing this?



I started with the following but it errors on the following line:-



PdfReader reader = new PdfReader(mstream);



Here is my code.



string sSource = HttpContext.Current.Server.MapPath("~/" +
"report.pdf");



MemoryStream mstream = new MemoryStream();



PdfReader pdfSource = new PdfReader(sSource);

PdfStamper pdfDest = new PdfStamper(pdfSource, mstream);

AcroFields aFields = pdfDest.AcroFields;

pdfDest.Writer.CloseStream = false;



// Update some form fields



pdfDest.FormFlattening = true;

pdfDest.Close();

pdfSource.Close();



// add table to document

Document doc = new Document();



MemoryStream mstream1 = new MemoryStream();

PdfReader reader = new PdfReader(mstream);

PdfWriter writer = PdfWriter.GetInstance(doc, mstream1);

writer.CloseStream = false;



doc.Open();



// Add in existing content

PdfContentByte cb = writer.DirectContent;

pdfImportedPage page = writer.GetImportedPage(reader, 1);

cb.AddTemplate(page, 0, 0);



// Add table



doc.Close();

writer.Close();




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