Merge PDF Files - C# and Java Code

using pdftron;  

using pdftron.PDF;  

using pdftron.SDF;  

  

namespace ConsoleApp1  

{  

    internal class Program  

    {  

        static void Main(string[] args)  

        {  

            PDFNet.Initialize("your_license_key");  

  

            using (PDFDoc doc1 = new PDFDoc("path_to_pdf1.pdf"))  

            using (PDFDoc doc2 = new PDFDoc("path_to_pdf2.pdf"))  

            {  

                doc1.InitSecurityHandler();  

                doc2.InitSecurityHandler();  

  

                // Merge doc2 into doc1  

                doc1.InsertPages(doc1.GetPageCount() + 1, doc2, 1, doc2.GetPageCount(), PDFDoc.InsertFlag.e_none);  

  

                // Save the merged document  

                doc1.Save("merged.pdf", SDFDoc.SaveOptions.e_linearized);  

  

                Console.WriteLine("Documents merged successfully!");  

            }  

        }  

    }  

}  

import com.pdftron.pdf.*;  

import com.pdftron.sdf.*;  

import com.pdftron.common.PDFNetException;  

  

public class App {  

public static void main(String[] args) {  

    try {  

      PDFNet.initialize("your_license_key");  

  

      PDFDoc doc1 = new PDFDoc("path_to_pdf1.pdf");  

      PDFDoc doc2 = new PDFDoc("path_to_pdf2.pdf");  

      doc1.initSecurityHandler();  

      doc2.initSecurityHandler();  

  

      // Merge doc2 into doc1  

      doc1.insertPages(doc1.getPageCount() + 1, doc2, 1, doc2.getPageCount(), PDFDoc.InsertBookmarkMode.NONE, null);  

      // Save the merged document  

      doc1.save("src\\samples\\merged.pdf", SDFDoc.SaveMode.LINEARIZED, null);  

  

      System.out.println("Documents merged successfully!");  

  

      doc1.close();  

      doc2.close();  

     

    } catch (PDFNetException e) {  

      e.printStackTrace();  

    }  

  }  

}