Project Description

Merge PDF Files using the iTextSharp library.

We pass a set of PDF files to the method and get one file with all the passed files merged.

Code

using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using iTextSharp.text;

using iTextSharp.text.pdf;

namespace PDFManager

{

public class PDFManager

{

public void MergePDFFiles(string[] sourceFiles, string destinationFile)

{

try

{

int f = 0;

// we create a reader for a certain document

PdfReader reader = new PdfReader(sourceFiles[f]);

// we retrieve the total number of pages

int n = reader.NumberOfPages;

// step 1: creation of a document-object

Document document = new Document(reader.GetPageSizeWithRotation(1));

// step 2: we create a writer that listens to the document

PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(destinationFile, FileMode.Create));

// step 3: we open the document

document.Open();

PdfContentByte cb = writer.DirectContent;

PdfImportedPage page;

int rotation;

// step 4: we add content

while (f < sourceFiles.Length)

{

int i = 0;

while (i < n)

{

i++;

document.SetPageSize(reader.GetPageSizeWithRotation(i));

document.NewPage();

page = writer.GetImportedPage(reader, i);

rotation = reader.GetPageRotation(i);

if (rotation == 90 || rotation == 270)

{

cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(i).Height);

}

else

{

cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);

}

}

f++;

if (f < sourceFiles.Length)

{

reader = new PdfReader(sourceFiles[f]);

// we retrieve the total number of pages

n = reader.NumberOfPages;

}

}

// step 5: we close the document

document.Close();

}

catch (Exception e)

{

throw e;

}

}

}

}