EVO HTML to PDF Converter allows you to add an Acrobat JavaScript code in generated PDF to be executed when the PDF document is opened in a PDF viewer. You can set open actions in the generated PDF document to display an alert message, automatically open the print dialog or set the zoom level of the generated PDF document.
An Acrobat JavaScript action is represented by a PdfActionJavaScript object which can be assigned to DocumentOpenAction property.
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
// Use EVO PDF Namespace
using EvoPdfClient;
namespace EvoHtmlToPdfDemo.HTML_to_PDF.PDF_Actions
{
public partial class Execute_JavaScript_Open_Action : System.Web.UI.Page
{
protected void convertToPdfButton_Click(object sender, EventArgs e)
{
// Get the server IP and port
String serverIP = textBoxServerIP.Text;
uint serverPort = uint.Parse(textBoxServerPort.Text);
// Create a HTML to PDF converter object
HtmlToPdfConverter htmlToPdfConverter = null;
if (radioButtonUseTcpService.Checked)
htmlToPdfConverter = new HtmlToPdfConverter(serverIP, serverPort);
else
htmlToPdfConverter = new HtmlToPdfConverter(true, textBoxWebServiceUrl.Text);
// Set optional service password
if (textBoxServicePassword.Text.Length > 0)
htmlToPdfConverter.ServicePassword = textBoxServicePassword.Text;
// 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;
// Convert a HTML page to a PDF document object
Document pdfDocument = htmlToPdfConverter.ConvertUrlToPdfDocumentObject(urlTextBox.Text);
string javaScript = null;
if (alertMessageRadioButton.Checked)
{
// JavaScript to display an alert mesage
javaScript = String.Format("app.alert(\"{0}\")", alertMessageTextBox.Text);
}
else if (printDialogRadioButton.Checked)
{
// JavaScript to open the print dialog
javaScript = "print()";
}
else if (zoomLevelRadioButton.Checked)
{
// JavaScript to set an initial zoom level
javaScript = String.Format("zoom={0}", int.Parse(zoomLevelTextBox.Text));
}
// Set the JavaScript action
pdfDocument.OpenAction = new PdfActionJavaScript(javaScript);
// Save the PDF document in a memory buffer
byte[] outPdfBuffer = pdfDocument.Save();
// Send the PDF as response to browser
// Set response content type
Response.AddHeader("Content-Type", "application/pdf");
// Instruct the browser to open the PDF file as an attachment or inline
Response.AddHeader("Content-Disposition", String.Format("attachment; filename=Execute_Acrobat_JavaScript.pdf; size={0}", outPdfBuffer.Length.ToString()));
// Write the PDF document buffer to HTTP response
Response.BinaryWrite(outPdfBuffer);
// End the HTTP response and stop the current page processing
Response.End();
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
sampleCodeLiteral.Text = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/Code_Samples/CSharp/AspNet/HTML_to_PDF/PDF_Actions/Execute_JavaScript_Open.html"));
descriptionLiteral.Text = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/Descriptions/AspNet/HTML_to_PDF/PDF_Actions/Execute_JavaScript_Open.html"));
Master.CollapseAll();
Master.ExpandNode("HTML_to_PDF");
Master.ExpandNode("PDF_Actions");
Master.SelectNode("Execute_JavaScript_Open_Action");
}
}
protected void alertMessageRadioButton_CheckedChanged(object sender, EventArgs e)
{
zoomLevelPanel.Visible = zoomLevelRadioButton.Checked;
alertMessagePanel.Visible = alertMessageRadioButton.Checked;
}
protected void printDialogRadioButton_CheckedChanged(object sender, EventArgs e)
{
zoomLevelPanel.Visible = zoomLevelRadioButton.Checked;
alertMessagePanel.Visible = alertMessageRadioButton.Checked;
}
protected void zoomLevelRadioButton_CheckedChanged(object sender, EventArgs e)
{
zoomLevelPanel.Visible = zoomLevelRadioButton.Checked;
alertMessagePanel.Visible = alertMessageRadioButton.Checked;
}
protected void demoMenu_MenuItemClick(object sender, MenuEventArgs e)
{
switch (e.Item.Value)
{
case "Live_Demo":
demoMultiView.SetActiveView(liveDemoView);
break;
case "Description":
demoMultiView.SetActiveView(descriptionView);
break;
case "Sample_Code":
demoMultiView.SetActiveView(sampleCodeView);
break;
default:
break;
}
}
}
}