PDF to HTML Converter

HiQPdf Client for .NET Core

With HiQPdf library you can convert PDF pages to HTML documents using the HiQPdfClientPdfToHtml class. You can convert to HTML documents encapsulated in HiQPdfClientPdfPageHtmlCode objects in memory using the PdfToHtmlConvertToHtml(String, Int32, Int32) method or to HTML files using the PdfToHtmlConvertToHtmlFiles(String, Int32, Int32, String, String) method. There is also a special method PdfToHtmlRaisePageConvertedToHtmlEvent(String, Int32, Int32) which can be used to convert the PDF document pages to HTML one by one in memory to avoid high memory usage for large PDF documents. The HiQPdfClientPdfPageHtmlCode objects can be disposed when they are no longer necessary.

PDF to HTML Converter Demo

In this demo you can learn how to convert the pages of a PDF document to HTML documents. You can choose the resolution of the resulted HTML document, the zoom level and the range of PDF pages to convert to HTML.

Demo Source Code

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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 System.Text;

using HiQPdfClient;

namespace HiQPdf_Demo.Controllers
{
    public class PdfToHtmlConverterController : Controller
    {
        IWebHostEnvironment m_hostingEnvironment;
        public PdfToHtmlConverterController(IWebHostEnvironment hostingEnvironment)
        {
            m_hostingEnvironment = hostingEnvironment;
        }

        // GET: PdfToHtmlConverter
        public ActionResult Index()
        {
            SetCrtPageUri();

            return View();
        }

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

            // get the PDF file
            string pdfFile = m_hostingEnvironment.WebRootPath + "/DemoFiles/Pdf/Presentation.pdf";

            // create the PDF to HTML converter
            PdfToHtml pdfToHtmlConverter = new PdfToHtml(serverIP, serverPort);

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

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

            // set the conversion resolution in DPI
            pdfToHtmlConverter.DPI = int.Parse(collection["textBoxDPI"]);

            // set the zoom level
            pdfToHtmlConverter.Zoom = int.Parse(collection["textBoxZoom"]);

            int fromPdfPageNumber = int.Parse(collection["textBoxFromPage"]);
            int toPdfPageNumber = collection["textBoxToPage"][0].Length > 0 ? int.Parse(collection["textBoxToPage"]) : 0;

            // convert a range of pages of the PDF document to HTML documents in memory
            // the HTML can also be produced to a folder using the ConvertToHtmlFiles method
            // or they can be produced one by one using the RaisePageConvertedToHtmlEvent method
            PdfPageHtmlCode[] htmlDocuments = pdfToHtmlConverter.ConvertToHtml(pdfFile, fromPdfPageNumber, toPdfPageNumber);

            // return if no page was converted
            if (htmlDocuments.Length == 0)
                return Redirect("/PdfToHtmlConverter");

            // get the first page HTML bytes in a buffer
            byte[] htmlDocumentBuffer = null;
            try
            {
                // get the HTML document UTF-8 bytes
                htmlDocumentBuffer = Encoding.UTF8.GetBytes(htmlDocuments[0].HtmlCode);
            }
            finally
            {
                // dispose the HTML documents
                for (int i = 0; i < htmlDocuments.Length; i++)
                    htmlDocuments[i].Dispose();
            }

            FileResult fileResult = new FileContentResult(htmlDocumentBuffer, "text/html; charset=UTF-8");
            fileResult.FileDownloadName = "Page.html";

            return fileResult;
        }

        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;
        }
    }
}