    using System;
    using System.Collections.Generic;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;

    using System.Drawing;

    // Use EVO PDF Namespace
    using EvoPdfClient;

    namespace EvoHtmlToPdfDemo.PDF_Editor
    {
        public partial class Stamp_PDF : System.Web.UI.Page
        {
            protected void stampPdfButton_Click(object sender, EventArgs e)
            {
                // Get the server IP and port
                String serverIP = textBoxServerIP.Text;
                uint serverPort = uint.Parse(textBoxServerPort.Text);

                // Load the PDF document to stamp
                string pdfFileToStampPath = Server.MapPath("~/DemoAppFiles/Input/PDF_Files/PDF_Document.pdf");
                Document pdfDocument = null;
                if (radioButtonUseTcpService.Checked)
                    pdfDocument = new Document(serverIP, serverPort, textBoxServicePassword.Text, pdfFileToStampPath, null);
                else
                    pdfDocument = new Document(true, textBoxWebServiceUrl.Text, textBoxServicePassword.Text, pdfFileToStampPath, null);

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

                // Get the stamp width and height
                float stampWidth = float.Parse(stampWidthTextBox.Text);
                float stampHeight = float.Parse(stampHeightTextBox.Text);

                // Center the stamp at the top of PDF page
                float stampXLocation = (pdfDocument.GetPage(0).PageSize.Width - stampWidth) / 2;
                float stampYLocation = 0;

                // Create the stamp template to be repeated in each PDF page
                Template stampTemplate = pdfDocument.AddTemplate(stampXLocation, stampYLocation, stampWidth, stampHeight);

                // Create the HTML element to add in stamp template
                HtmlToPdfElement stampHtmlElement = new HtmlToPdfElement(htmlStringTextBox.Text, baseUrlTextBox.Text);

                // Set the HTML viewer width for the HTML added in stamp
                stampHtmlElement.HtmlViewerWidth = 600;
                // Fit the HTML content in stamp template
                stampHtmlElement.FitWidth = true;
                stampHtmlElement.FitHeight = true;

                // Add HTML to stamp template
                stampTemplate.AddElement(stampHtmlElement);

                // 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=Stamp_PDF.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)
                {
                    string currentPageUrl = HttpContext.Current.Request.Url.AbsoluteUri;
                    string rootUrl = "http://www.evopdf.com/demo/";

                    htmlStringTextBox.Text = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/HTML_Files/Watermark_Stamp.html"));
                    baseUrlTextBox.Text = rootUrl + "DemoAppFiles/Input/HTML_Files/";

                    pdfFileToStampHyperLink.NavigateUrl = rootUrl + "DemoAppFiles/Input/PDF_Files/PDF_Document.pdf";

                    sampleCodeLiteral.Text = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/Code_Samples/CSharp/AspNet/PDF_Editor/Stamp_PDF.html"));
                    descriptionLiteral.Text = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/Descriptions/AspNet/PDF_Editor/Stamp_PDF.html"));

                    Master.CollapseAll();
                    Master.ExpandNode("PDF_Editor");
                    Master.SelectNode("Stamp_PDF_Documents");
                }
            }

            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;
                }
            }
        }
    }