Ajouter une page au document PDF en utilisant iTextSharp

    private static string AddCommentsToFile(string fileName, string userComments)
{
string outputFileName = Path.GetTempFileName();
//Step 1: Create a Docuement-Object
Document document = new Document();
try
{
//Step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(outputFileName, FileMode.Create));
//Step 3: Open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
//The current file path
string filename = fileName;
//we create a reader for the document
PdfReader reader = new PdfReader(filename);
for (int pageNumber = 1; pageNumber < reader.NumberOfPages + 1; pageNumber++)
{
document.SetPageSize(reader.GetPageSizeWithRotation(1));
document.NewPage();
//Insert to Destination on the first page
if (pageNumber == 1)
{
Chunk fileRef = new Chunk(" ");
fileRef.SetLocalDestination(filename);
document.Add(fileRef);
}
PdfImportedPage page = writer.GetImportedPage(reader, pageNumber);
int rotation = reader.GetPageRotation(pageNumber);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(pageNumber).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
}
//Add a new page to the pdf file
document.NewPage();
Paragraph paragraph = new Paragraph();
Font titleFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 15
, iTextSharp.text.Font.BOLD
, BaseColor.BLACK
);
Chunk titleChunk = new Chunk("Comments", titleFont);
paragraph.Add(titleChunk);
document.Add(paragraph);
paragraph = new Paragraph();
Font textFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 12
, iTextSharp.text.Font.NORMAL
, BaseColor.BLACK
);
Chunk textChunk = new Chunk(userComments, textFont);
paragraph.Add(textChunk);
document.Add(paragraph);
}
catch (Exception e)
{
throw e;
}
finally
{
document.Close();
}
return outputFileName;
}

Vous ne pouvez pas utiliser PdfCopy d'ajouter des Pages. Vous aurez besoin de créer un nouveau document pdf et ajouter Si vous avez besoin de le faire (PdfCopy est le meilleur pour la fusion de pdf).

J'ai ajouté un exemple comment ajouter un pied de page trop:

PdfReader reader = new PdfReader("1.pdf");
Document document = new Document(reader.GetPageSize(1));
PdfCopy copier = new PdfCopy(doc, new FileStream("2.pdf", FileMode.Create));
for (int pageCounter = 1; pageCounter < reader.NumberOfPages + 1; pageCounter++)
{
//get page
PdfImportedPage page = copier.GetImportedPage(reader, pageCounter)
//add content to imported page
PageStamp ps = pdfCopy.CreatePageStamp(page);
PdfContentByte cb = ps.GetOverContent();
//set color
cb.SetColorFill(BaseColor.BLACK);
//get font
BaseFont baseFont = BaseFont.CreateFont(string.Format("{0}\\Fonts\\arialuni.ttf", Environment.GetEnvironmentVariable("windir"), BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
cb.SetFontAndSize(baseFont, 12);
cb.BeginText();
cb.ShowTextAligned(PdfContentByte.ALIGN_CENTER, printLangString, 100f, 40f, 0f);
cb.EndText();
//Accept changes                    
ps.AlterContents();
//add page
copier.AddPage(page);
}
using (var ms = new MemoryStream())
{
Document doc = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(doc, ms);
writer.CloseStream = false;
doc.Open();
doc.NewPage();
doc.Add(new Paragraph(error, fontRed));
doc.Close();
writer.Close();
ms.Seek(0, SeekOrigin.Begin);
PdfReader rd = new PdfReader(ms);
for (int pageCounter = 1; pageCounter < reader.NumberOfPages + 1; pageCounter++)
{
copier.AddPage(copier.GetImportedPage(rd, pageCounter));
}
rd.Close();
}
document.Close();
reader.Close();