HiQPdf Documentation

Merge PDF Documents

HiQPdf Client for .NET Core
Merge PDF Demo

In this demo you can learn how to merge multiple PDF document into a single PDF document. Initially is created an empty document which will become the final document. Then the two PDF files are loaded into two PdfDocuments objects which are added to the empty document.

Demo Source Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Hosting;

using HiQPdfClient;

namespace HiQPdf_Demo.Controllers
    public class MergePdfController : Controller
        IWebHostEnvironment m_hostingEnvironment;
        public MergePdfController(IWebHostEnvironment hostingEnvironment)
            m_hostingEnvironment = hostingEnvironment;

        // GET: MergePdf
        public ActionResult Index()

            return View();

        public ActionResult CreatePdf(IFormCollection collection)
            string serverIP = collection["textBoxServerIP"];
            uint serverPort = uint.Parse(collection["textBoxServerPort"]);
            string serverPassword = collection["textBoxServerPassword"];

            // create an empty document which will become the final document after merge
            PdfDocument resultDocument = new PdfDocument(serverIP, serverPort);

            // use server password if necessary
            if (serverPassword.Length > 0)
                resultDocument.ServerPassword = serverPassword;

            // set a demo serial number
            resultDocument.SerialNumber = "YCgJMTAE-BiwJAhIB-EhlWTlBA-UEBRQFBA-U1FOUVJO-WVlZWQ==";

            // load the first document to be merged from a file
            string pdfFile1 = m_hostingEnvironment.WebRootPath + "/DemoFiles/Pdf/WikiHtml.pdf";

            // The second document to be merged will be loaded from a memory buffer
            string pdfFile2 = m_hostingEnvironment.WebRootPath + "/DemoFiles/Pdf/WikiPdf.pdf";
            byte[] pdfData2 = System.IO.File.ReadAllBytes(pdfFile2);

            // add the two documents to the result document

                // write the PDF document to a memory buffer
                byte[] pdfBuffer = resultDocument.WriteToMemory();

                FileResult fileResult = new FileContentResult(pdfBuffer, "application/pdf");
                fileResult.FileDownloadName = "MergePdf.pdf";

                return fileResult;
                // close the result document

        private void SetCrtPageUri()
            HttpRequest httpRequest = this.ControllerContext.HttpContext.Request;
            UriBuilder uriBuilder = new UriBuilder();
            uriBuilder.Scheme = httpRequest.Scheme;
            uriBuilder.Host = httpRequest.Host.Host;
            if (httpRequest.Host.Port != null)
                uriBuilder.Port = (int)httpRequest.Host.Port;
            uriBuilder.Path = httpRequest.PathBase.ToString() + httpRequest.Path.ToString();
            uriBuilder.Query = httpRequest.QueryString.ToString();

            ViewData["CrtPageUri"] = uriBuilder.Uri.AbsoluteUri;
See Also

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