Combine PDFs c#

Question

How can I combine multiple PDFs into one PDF without a 3rd party component?

Solution 1

I don't think you can. Opensource component PDFSharp has that functionality, and a nice source code sample on file combining

Solution 2

The .NET Framework does not contain the ability to modify/create PDFs. You need a 3rd party component to accomplish what you are looking for.

Solution 3

As others have said, there is nothing built in to do that task. Use iTextSharp with this example code.

Solution 4

AFAIK C# has no built-in support for handling PDF so what you are asking can not be done without using a 3rd party component or a COTS library.

Regarding libraries there is a myriad of possibilities. Just to point a few:

http://csharp-source.net/open-source/pdf-libraries

http://www.codeproject.com/KB/graphics/giospdfnetlibrary.aspx

http://www.pdftron.com/net/index.html

Solution 5

I don't think .NET Framework contains such like libraries. I used iTextsharp with c# to combine pdf files. I think iTextsharp is easyest way to do this. Here is the code I used.

string[] lstFiles=new string[3];
    lstFiles[0]=@"C:/pdf/1.pdf";
    lstFiles[1]=@"C:/pdf/2.pdf";
    lstFiles[2]=@"C:/pdf/3.pdf";

    PdfReader reader = null;
    Document sourceDocument = null;
    PdfCopy pdfCopyProvider = null;
    PdfImportedPage importedPage;
    string outputPdfPath=@"C:/pdf/new.pdf";


    sourceDocument = new Document();
    pdfCopyProvider = new PdfCopy(sourceDocument, new System.IO.FileStream(outputPdfPath, System.IO.FileMode.Create));

    //Open the output file
    sourceDocument.Open();

    try
    {
        //Loop through the files list
        for (int f = 0; f < lstFiles.Length-1; f++)
        {
            int pages =get_pageCcount(lstFiles[f]);

            reader = new PdfReader(lstFiles[f]);
            //Add pages of current file
            for (int i = 1; i <= pages; i++)
            {
                importedPage = pdfCopyProvider.GetImportedPage(reader, i);
                pdfCopyProvider.AddPage(importedPage);
            }

            reader.Close();
         }
        //At the end save the output file
        sourceDocument.Close();
    }
    catch (Exception ex)
    {
        throw ex;
    }


private int get_pageCcount(string file)
{
    using (StreamReader sr = new StreamReader(File.OpenRead(file)))
    {
        Regex regex = new Regex(@"/Type\s*/Page[^s]");
        MatchCollection matches = regex.Matches(sr.ReadToEnd());

        return matches.Count;
    }
}

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