Merge two or More PDF into a single PDF using PDFSharp Library in SharePoint 2010

Problem:

Need  to merge two or more PDFs into a single PDF in SharePoint 2010


Solution:

I have searched around web for the solution and it seems many third Party dlls like itextsharp,selectPDF, PDFSharp etc are available to achieve this functionality. I go with PDFsharp free Licence.

Download the PDFsharp  dll

Below is the code :

arrFilesToZip - This is array list to store all the PDF file location which you want to merge.
CombinedFilePath - This  is the Merge PDF file full path URL


                PdfDocument outputDocument = new PdfDocument();

                // Iterate files
                foreach (object tmpfile in arrFilesToZip)
                {
                    string file = (string)tmpfile;
                    // Open the document to import pages from it.

                    PdfDocument inputDocument = PdfReader.Open(file, PdfDocumentOpenMode.Import);

                    // Iterate pages

                    int count = inputDocument.PageCount;
                    for (int idx = 0; idx < count; idx++)
                    {
                        // Get the page from the external document...
                        PdfPage page = inputDocument.Pages[idx];

                        // ...and add it to the output document.
                        outputDocument.AddPage(page);

                    }
                }

                // Save the document...

   
                string combinedFilesPdfName = "CombinedFilePath"+".pdf";
                //  if (File.Exists(combinedFilesPdfName))
                //      File.Delete(combinedFilesPdfName);



                outputDocument.Save(combinedFilesPdfName);

Please let me know if you face any issue in merge of the files using this code.

cheers.