Execute Acrobat JavaScript Code when a Button is Clicked

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

// Use EVO PDF Namespace
using EvoPdfClient;

namespace EvoHtmlToPdfDemo.Controllers.HTML_to_PDF.PDF_Actions
{
    public class Execute_JavaScript_Button_ClickedController : Controller
    {
        [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 htmlWithButton = collection["htmlStringTextBox"];
            string baseUrl = collection["baseUrlTextBox"];

            // Convert a HTML string with a button to a PDF document object
            Document pdfDocument = htmlToPdfConverter.ConvertHtmlToPdfDocumentObject(htmlWithButton, baseUrl);

            // Get the button location in PDF
            HtmlElementMapping buttonMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("javascript_button");
            if (buttonMapping != null)
            {
                PdfPage buttonPdfPage = pdfDocument.GetPage(buttonMapping.PdfRectangles[0].PageIndex);
                RectangleFloat buttonRectangle = buttonMapping.PdfRectangles[0].Rectangle;

                // The font used for buttons text in PDF document
                PdfFont buttonTextFont = new PdfFont("Times New Roman", 8, true);

                // Create a PDF form button
                PdfFormButton pdfButton = new PdfFormButton(buttonRectangle, "Execute Acrobat JavaScript", buttonTextFont);
                pdfButton.Style.BackColor = RgbColor.Beige;
                pdfDocument.Form.AddButton(buttonPdfPage, pdfButton);

                // Set JavaScript action to be executed when the button is clicked
                string javaScript = null;
                if (collection["JavaScriptAction"] == "alertMessageRadioButton")
                {
                    // JavaScript to display an alert mesage 
                    javaScript = String.Format("app.alert(\"{0}\")", collection["alertMessageTextBox"]);
                }
                else if (collection["JavaScriptAction"] == "printDialogRadioButton")
                {
                    // JavaScript to open the print dialog
                    javaScript = "print()";
                }
                else if (collection["JavaScriptAction"] == "zoomLevelRadioButton")
                {
                    // JavaScript to set an initial zoom level 
                    javaScript = String.Format("zoom={0}", int.Parse(collection["zoomLevelTextBox"]));
                }

                // Set the JavaScript action
                pdfButton.Action = new PdfActionJavaScript(javaScript);
            }

            // 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 = "Button_JavaScript_Actions.pdf";

            return fileResult;
        }
    }
}