Add Text Notes to Generated PDF Document

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;

// Use Winnovative Namespace
using WinnovativeClient;

namespace WnvHtmlToPdfDemo.Controllers
{
    public class Create_Text_NotesController : Controller
    {
        private readonly Microsoft.AspNetCore.Hosting.IWebHostEnvironment m_hostingEnvironment;
        public Create_Text_NotesController(IWebHostEnvironment hostingEnvironment)
        {
            m_hostingEnvironment = hostingEnvironment;
        }

        private void SetCurrentViewData()
        {
            ViewData["ContentRootPath"] = m_hostingEnvironment.ContentRootPath + "/wwwroot";

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

            ViewData["CurrentPageUrl"] = uriBuilder.Uri.AbsoluteUri;
        }

        // GET: Create_Text_Notes
        public ActionResult Index()
        {
            SetCurrentViewData();

            return View();
        }

        [HttpPost]
        public ActionResult ConvertHtmlToPdf(IFormCollection collection)
        {
            // Get the server options
            string serverIP = collection["textBoxServerIP"];
            uint serverPort = uint.Parse(collection["textBoxServerPort"]);
            string servicePassword = collection["textBoxServicePassword"];
            bool useServicePassword = servicePassword.Length > 0;
            bool useTcpService = collection["ServerType"] == "radioButtonUseTcpService";
            string webServiceUrl = collection["textBoxWebServiceUrl"];

            // Create the HTML to PDF converter object
            HtmlToPdfConverter htmlToPdfConverter = null;
            if (useTcpService)
                htmlToPdfConverter = new HtmlToPdfConverter(serverIP, serverPort);
            else
                htmlToPdfConverter = new HtmlToPdfConverter(true, webServiceUrl);

            // Set optional service password
            if (useServicePassword)
                htmlToPdfConverter.ServicePassword = servicePassword;

            // Set license key received after purchase to use the converter in licensed mode
            // Leave it not set to use the converter in demo mode
            htmlToPdfConverter.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

            // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
            // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
            htmlToPdfConverter.ConversionDelay = 2;

            string htmlWithLinksAndAttachMarkers = collection["htmlStringTextBox"];
            string baseUrl = collection["baseUrlTextBox"];

            // Convert a HTML string with markers for file links and attachments to a PDF document object
            Document pdfDocument = htmlToPdfConverter.ConvertHtmlToPdfDocumentObject(htmlWithLinksAndAttachMarkers, baseUrl);

            // Make the HTML element with 'text_note' mapping ID a text note
            HtmlElementMapping textNoteMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("text_note");
            if (textNoteMapping != null)
            {
                PdfPage textNotePage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat textNoteRectangle = textNoteMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement textNoteElement = new TextNoteElement(textNoteRectangle, "This is an initially closed text note");
                textNoteElement.NoteIcon = TextNoteIcon.Note;
                textNoteElement.Open = false;
                textNotePage.AddElement(textNoteElement);
            }

            // Make the HTML element with 'text_note_opened' mapping ID an initially opened text note
            HtmlElementMapping textNoteOpenedMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("text_note_opened");
            if (textNoteOpenedMapping != null)
            {
                PdfPage textNoteOpenedPage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat textNoteOpenedRectangle = textNoteOpenedMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement textNoteOpenedElement = new TextNoteElement(textNoteOpenedRectangle, "This is an initially opened text note");
                textNoteOpenedElement.NoteIcon = TextNoteIcon.Note;
                textNoteOpenedElement.Open = true;
                textNoteOpenedPage.AddElement(textNoteOpenedElement);
            }

            // Make the HTML element with 'help_note' mapping ID a help note
            HtmlElementMapping helpNoteMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("help_note");
            if (helpNoteMapping != null)
            {
                PdfPage helpNotePage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat helpNoteRectangle = helpNoteMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement helpNoteElement = new TextNoteElement(helpNoteRectangle, "This is an initially closed help note");
                helpNoteElement.NoteIcon = TextNoteIcon.Help;
                helpNoteElement.Open = false;
                helpNotePage.AddElement(helpNoteElement);
            }

            // Make the HTML element with 'help_note_opened' mapping ID an initially opened help note
            HtmlElementMapping helpNoteOpenedMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("help_note_opened");
            if (helpNoteOpenedMapping != null)
            {
                PdfPage helpNoteOpenedPage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat helpNoteOpenedRectangle = helpNoteOpenedMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement helpNoteOpenedElement = new TextNoteElement(helpNoteOpenedRectangle, "This is an initially opened help note");
                helpNoteOpenedElement.NoteIcon = TextNoteIcon.Help;
                helpNoteOpenedElement.Open = true;
                helpNoteOpenedPage.AddElement(helpNoteOpenedElement);
            }

            // Make the HTML element with 'comment_note' mapping ID a comment note
            HtmlElementMapping commentNoteMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("comment_note");
            if (commentNoteMapping != null)
            {
                PdfPage commentNotePage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat commentNoteRectangle = commentNoteMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement commentNoteElement = new TextNoteElement(commentNoteRectangle, "This is an initially closed comment note");
                commentNoteElement.NoteIcon = TextNoteIcon.Comment;
                commentNoteElement.Open = false;
                commentNotePage.AddElement(commentNoteElement);
            }

            // Make the HTML element with 'comment_note_opened' mapping ID an initially opened comment note
            HtmlElementMapping commentNoteOpenedMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("comment_note_opened");
            if (commentNoteOpenedMapping != null)
            {
                PdfPage commentNoteOpenedPage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat commentNoteOpenedRectangle = commentNoteOpenedMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement commentNoteOpenedElement = new TextNoteElement(commentNoteOpenedRectangle, "This is an initially opened comment note");
                commentNoteOpenedElement.NoteIcon = TextNoteIcon.Comment;
                commentNoteOpenedElement.Open = true;
                commentNoteOpenedPage.AddElement(commentNoteOpenedElement);
            }

            // Make the HTML element with 'paragraph_note' mapping ID a paragraph note
            HtmlElementMapping paragraphNoteMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("paragraph_note");
            if (paragraphNoteMapping != null)
            {
                PdfPage paragraphNotePage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat paragraphNoteRectangle = paragraphNoteMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement paragraphNoteElement = new TextNoteElement(paragraphNoteRectangle, "This is an initially closed paragraph note");
                paragraphNoteElement.NoteIcon = TextNoteIcon.Paragraph;
                paragraphNoteElement.Open = false;
                paragraphNotePage.AddElement(paragraphNoteElement);
            }

            // Make the HTML element with 'new_paragraph_note' mapping ID a new paragraph note
            HtmlElementMapping newParagraphNoteMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("new_paragraph_note");
            if (newParagraphNoteMapping != null)
            {
                PdfPage newParagraphNotePage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat newParagraphNoteRectangle = newParagraphNoteMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement newParagraphNoteElement = new TextNoteElement(newParagraphNoteRectangle, "This is an initially closed new paragraph note");
                newParagraphNoteElement.NoteIcon = TextNoteIcon.NewParagraph;
                newParagraphNoteElement.Open = false;
                newParagraphNotePage.AddElement(newParagraphNoteElement);
            }

            // Make the HTML element with 'key_note' mapping ID a key note
            HtmlElementMapping keyNoteMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("key_note");
            if (keyNoteMapping != null)
            {
                PdfPage keyNotePage = pdfDocument.GetPage(textNoteMapping.PdfRectangles[0].PageIndex);
                RectangleFloat keyNoteRectangle = keyNoteMapping.PdfRectangles[0].Rectangle;

                // Create the text note
                TextNoteElement keyNoteElement = new TextNoteElement(keyNoteRectangle, "This is an initially closed key note");
                keyNoteElement.NoteIcon = TextNoteIcon.Key;
                keyNoteElement.Open = false;
                keyNotePage.AddElement(keyNoteElement);
            }

            // Save the PDF document in a memory buffer
            byte[] outPdfBuffer = pdfDocument.Save();

            // Send the PDF file to browser
            FileResult fileResult = new FileContentResult(outPdfBuffer, "application/pdf");
            fileResult.FileDownloadName = "Text_Notes.pdf";

            return fileResult;
        }
    }
}

<!DOCTYPE html>
<html>
<head>
    <title>Add Text Notes to PDF</title>
</head>
<body style="font-family: 'Times New Roman'; font-size: 14px">
    <span style="font-size: 24px; font-weight: bold">Text Notes</span><br />
    <br />
    <span style="">Click the next icon to open the the text note:</span>
    <span data-mapping-enabled="true" data-mapping-id="text_note">&nbsp;&nbsp;</span><br />
    <br />
    <span style="">This is an already opened text note:</span>
    <span data-mapping-enabled="true" data-mapping-id="text_note_opened">&nbsp;&nbsp;</span><br />
    <br />
    <span style="">Click the next icon to open the the help note:</span>
    <span data-mapping-enabled="true" data-mapping-id="help_note">&nbsp;&nbsp;</span><br />
    <br />
    <span style="">This is an already opened help note:</span>
    <span data-mapping-enabled="true" data-mapping-id="help_note_opened">&nbsp;&nbsp;</span><br />
    <br />
    <span style="">Click the next icon to open the comment:</span>
    <span data-mapping-enabled="true" data-mapping-id="comment_note">&nbsp;&nbsp;</span><br />
    <br />
    <span style="">This is an already opened comment:</span>
    <span data-mapping-enabled="true" data-mapping-id="comment_note_opened">&nbsp;&nbsp;</span><br />
    <br />
    <span style="">Click the next icon to open the paragraph note:</span>
    <span data-mapping-enabled="true" data-mapping-id="paragraph_note">&nbsp;&nbsp;</span><br />
    <br />
    <span style="">Click the next icon to open the new paragraph note:</span>
    <span data-mapping-enabled="true" data-mapping-id="new_paragraph_note">&nbsp;&nbsp;</span><br />
    <br />
    <span style="">Click the next icon to open the key note:</span>
    <span data-mapping-enabled="true" data-mapping-id="key_note">&nbsp;&nbsp;</span><br />
</body>
</html>