HiQPdf Next HTML to PDF Converter for .NET

using System.ComponentModel.DataAnnotations;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Hosting;
using HiQPdf_Next_AspNetDemo.Models;

using HiQPdf.Next;

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

        // GET: ConvertHtmlToPdf
        public ActionResult Index()
        {
            var model = SetViewModel();
            return View(model);
        }

        [HttpPost]
        public ActionResult ConvertToPdf(ConvertHtmlToPdfViewModel model)
        {
            if (!ModelState.IsValid)
            {
                var errorMessage = ModelStateHelper.GetModelErrors(ModelState);
                throw new ValidationException(errorMessage);
            }

            // Replace the demo serial number with the serial number received upon purchase
            // to run the converter in licensed mode
            Licensing.SerialNumber = "YCgJMTAE-BiwJAhIB-EhlWTlBA-UEBRQFBA-U1FOUVJO-WVlZWQ==";

            // Create an HTML to PDF converter object with default settings
            HtmlToPdf htmlToPdfConverter = new HtmlToPdf();

            // Set browser width
            htmlToPdfConverter.BrowserWidth = model.BrowserWidth;

            // Set browser height if specified, otherwise use the default
            if (model.BrowserHeight.HasValue)
                htmlToPdfConverter.BrowserHeight = model.BrowserHeight.Value;

            // Set browser zoom
            htmlToPdfConverter.BrowserZoom = model.BrowserZoom;

            // Set an additional delay, in seconds, to wait for asynchronous content after the initial load
            // The default value is 0
            htmlToPdfConverter.WaitBeforeConvert = model.WaitTime;

            // Set the maximum time, in seconds, to wait for the HTML page to load
            // The default value is 120 seconds
            htmlToPdfConverter.HtmlLoadedTimeout = model.LoadHtmlTimeout;

            // Optionally load the lazy images
            htmlToPdfConverter.LoadLazyImages = model.LoadLazyImages;

            // Set the lazy images load mode
            htmlToPdfConverter.LazyImagesLoadMode = model.LazyImagesLoadMode == "Browser" ?
                LazyImagesLoadMode.Browser : LazyImagesLoadMode.Custom;

            // Set the media type used in @media rules when rendering HTML to PDF
            htmlToPdfConverter.MediaType = model.MediaType == "Print" ? "print" : "screen";

            // Automatically resize the PDF page width to match the BrowserWidth property
            // The default value is true
            htmlToPdfConverter.Document.AutoResizePdfPageWidth = model.AutoResizePdfPageWidth;

            // Set the PDF page size, which can be a predefined size like A4 or a custom size in points
            // The default is A4
            // Important Note: The PDF page width is automatically determined from the BrowserWidth
            // when the AutoResizePdfPageWidth property is true
            htmlToPdfConverter.Document.PageSize = GetSelectedPageSize(model.PageSize);

            // Set the PDF page orientation to Portrait or Landscape. The default is Portrait
            htmlToPdfConverter.Document.PageOrientation = GetSelectedPageOrientation(model.PageOrientation);

            // Set the PDF page margins in points. The default is 0
            htmlToPdfConverter.Document.Margins = new PdfMargins(
                        model.LeftMargin, model.RightMargin,
                        model.TopMargin, model.BottomMargin);

            // Set the document security
            htmlToPdfConverter.Document.Security.OpenPassword = model.OpenPassword;
            htmlToPdfConverter.Document.Security.AllowPrinting = model.AllowPrinting;

            // Convert HTML to PDF
            byte[] pdfBuffer = null;

            if (model.UrlOrHtmlCode == "ConvertUrl")
            {
                // Convert URL to a PDF memory buffer
                string url = model.Url;

                pdfBuffer = htmlToPdfConverter.ConvertUrlToMemory(url);
            }
            else
            {
                // Convert HTML code
                string htmlCode = model.HtmlCode;
                string baseUrl = model.BaseUrl;

                // convert HTML code to a PDF memory buffer
                pdfBuffer = htmlToPdfConverter.ConvertHtmlToMemory(htmlCode, baseUrl);
            }

            FileResult fileResult = new FileContentResult(pdfBuffer, "application/pdf");
            if (!model.OpenInline)
                fileResult.FileDownloadName = "HtmlToPdf.pdf";

            return fileResult;
        }

        private PdfPageSize GetSelectedPageSize(string pageSize)
        {
            switch (pageSize)
            {
                case "A0":
                    return PdfPageSize.A0;
                case "A1":
                    return PdfPageSize.A1;
                case "A10":
                    return PdfPageSize.A10;
                case "A2":
                    return PdfPageSize.A2;
                case "A3":
                    return PdfPageSize.A3;
                case "A4":
                    return PdfPageSize.A4;
                case "A5":
                    return PdfPageSize.A5;
                case "A6":
                    return PdfPageSize.A6;
                case "A7":
                    return PdfPageSize.A7;
                case "A8":
                    return PdfPageSize.A8;
                case "A9":
                    return PdfPageSize.A9;
                case "ArchA":
                    return PdfPageSize.ArchA;
                case "ArchB":
                    return PdfPageSize.ArchB;
                case "ArchC":
                    return PdfPageSize.ArchC;
                case "ArchD":
                    return PdfPageSize.ArchD;
                case "ArchE":
                    return PdfPageSize.ArchE;
                case "B0":
                    return PdfPageSize.B0;
                case "B1":
                    return PdfPageSize.B1;
                case "B2":
                    return PdfPageSize.B2;
                case "B3":
                    return PdfPageSize.B3;
                case "B4":
                    return PdfPageSize.B4;
                case "B5":
                    return PdfPageSize.B5;
                case "Flsa":
                    return PdfPageSize.Flsa;
                case "HalfLetter":
                    return PdfPageSize.HalfLetter;
                case "Ledger":
                    return PdfPageSize.Ledger;
                case "Legal":
                    return PdfPageSize.Legal;
                case "Letter":
                    return PdfPageSize.Letter;
                case "Letter11x17":
                    return PdfPageSize.Letter11x17;
                case "Note":
                    return PdfPageSize.Note;
                default:
                    return PdfPageSize.A4;
            }
        }

        private PdfPageOrientation GetSelectedPageOrientation(string pageOrientation)
        {
            return pageOrientation == "Portrait" ?
                PdfPageOrientation.Portrait : PdfPageOrientation.Landscape;
        }

        private ConvertHtmlToPdfViewModel SetViewModel()
        {
            var model = new ConvertHtmlToPdfViewModel();
            return model;
        }
    }
}