    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.HTML_to_PDF.Headers_and_Footers
    {
        public partial class Header_Footer_In_External_PDF : 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;

                // Set the PDF file to be inserted before conversion result
                string pdfFileBefore = Server.MapPath("~/DemoAppFiles/Input/PDF_Files/Merge_Before_Conversion.pdf");
                htmlToPdfConverter.PdfDocumentOptions.AddStartDocument(pdfFileBefore, addHeaderFooterInInsertedPdfCheckBox.Checked,
                                    showHeaderInFirstPageCheckBox.Checked, showFooterInFirstPageCheckBox.Checked);

                // Set the PDF file to be added after conversion result
                string pdfFileAfter = Server.MapPath("~/DemoAppFiles/Input/PDF_Files/Merge_After_Conversion.pdf");
                htmlToPdfConverter.PdfDocumentOptions.AddEndDocument(pdfFileAfter, addHeaderFooterInAppendedPdfCheckBox.Checked, true, true);

                // Enable header in the generated PDF document
                htmlToPdfConverter.PdfDocumentOptions.ShowHeader = true;

                // Draw header elements
                if (htmlToPdfConverter.PdfDocumentOptions.ShowHeader)
                    DrawHeader(htmlToPdfConverter, true);

                // Enable footer in the generated PDF document
                htmlToPdfConverter.PdfDocumentOptions.ShowFooter = true;

                // Draw footer elements
                if (htmlToPdfConverter.PdfDocumentOptions.ShowFooter)
                    DrawFooter(htmlToPdfConverter, true, true);

                string url = urlTextBox.Text;

                // Convert the HTML page to a PDF document and add the external PDF documents
                byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(url);

                // 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=Header_Footer_in_External_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();
            }

            /// <summary>
            /// Draw the header elements
            /// </summary>
            /// <param name="htmlToPdfConverter">The HTML to PDF Converter object</param>
            /// <param name="drawHeaderLine">A flag indicating if a line should be drawn at the bottom of the header</param>
            private void DrawHeader(HtmlToPdfConverter htmlToPdfConverter, bool drawHeaderLine)
            {
                string headerHtmlString = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/HTML_Files/Header_HTML.html"));
                string headerBaseUrl = "http://www.evopdf.com/demo/DemoAppFiles/Input/HTML_Files/";

                // Set the header height in points
                htmlToPdfConverter.PdfHeaderOptions.HeaderHeight = 60;

                // Set header background color
                htmlToPdfConverter.PdfHeaderOptions.HeaderBackColor = RgbColor.White;

                // Create a HTML element to be added in header
                HtmlToPdfElement headerHtml = new HtmlToPdfElement(headerHtmlString, headerBaseUrl);

                // Set the HTML element to fit the container height
                headerHtml.FitHeight = true;

                // Add HTML element to header
                htmlToPdfConverter.PdfHeaderOptions.AddElement(headerHtml);

                if (drawHeaderLine)
                {
                    // Calculate the header width based on PDF page size and margins
                    float headerWidth = htmlToPdfConverter.PdfDocumentOptions.PdfPageSize.Width -
                                htmlToPdfConverter.PdfDocumentOptions.LeftMargin - htmlToPdfConverter.PdfDocumentOptions.RightMargin;

                    // Calculate header height
                    float headerHeight = htmlToPdfConverter.PdfHeaderOptions.HeaderHeight;

                    // Create a line element for the bottom of the header
                    LineElement headerLine = new LineElement(0, headerHeight - 1, headerWidth, headerHeight - 1);

                    // Set line color
                    headerLine.ForeColor = RgbColor.Gray;

                    // Add line element to the bottom of the header
                    htmlToPdfConverter.PdfHeaderOptions.AddElement(headerLine);
                }
            }

            /// <summary>
            /// Draw the footer elements
            /// </summary>
            /// <param name="htmlToPdfConverter">The HTML to PDF Converter object</param>
            /// <param name="addPageNumbers">A flag indicating if the page numbering is present in footer</param>
            /// <param name="drawFooterLine">A flag indicating if a line should be drawn at the top of the footer</param>
            private void DrawFooter(HtmlToPdfConverter htmlToPdfConverter, bool addPageNumbers, bool drawFooterLine)
            {
                string footerHtmlString = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/HTML_Files/Footer_HTML.html"));
                string baseUrl = "http://www.evopdf.com/demo/DemoAppFiles/Input/HTML_Files/";

                // Set the footer height in points
                htmlToPdfConverter.PdfFooterOptions.FooterHeight = 60;

                // Set footer background color
                htmlToPdfConverter.PdfFooterOptions.FooterBackColor = RgbColor.WhiteSmoke;

                // Create a HTML element to be added in footer
                HtmlToPdfElement footerHtml = new HtmlToPdfElement(footerHtmlString, baseUrl);

                // Set the HTML element to fit the container height
                footerHtml.FitHeight = true;

                // Add HTML element to footer
                htmlToPdfConverter.PdfFooterOptions.AddElement(footerHtml);

                // Add page numbering
                if (addPageNumbers)
                {
                    // Create a text element with page numbering place holders &p; and & P;
                    TextElement footerText = new TextElement(0, 30, "Page &p; of &P;  ",
                        new PdfFont("Times New Roman", 10, true));

                    // Align the text at the right of the footer
                    footerText.TextAlign = HorizontalTextAlign.Right;

                    // Set page numbering text color
                    footerText.ForeColor = RgbColor.Navy;

                    // Embed the text element font in PDF
                    footerText.EmbedSysFont = true;

                    // Add the text element to footer
                    htmlToPdfConverter.PdfFooterOptions.AddElement(footerText);
                }

                if (drawFooterLine)
                {
                    // Calculate the footer width based on PDF page size and margins
                    float footerWidth = htmlToPdfConverter.PdfDocumentOptions.PdfPageSize.Width -
                                htmlToPdfConverter.PdfDocumentOptions.LeftMargin - htmlToPdfConverter.PdfDocumentOptions.RightMargin;

                    // Create a line element for the top of the footer
                    LineElement footerLine = new LineElement(0, 0, footerWidth, 0);

                    // Set line color
                    footerLine.ForeColor = RgbColor.Gray;

                    // Add line element to the bottom of the footer
                    htmlToPdfConverter.PdfFooterOptions.AddElement(footerLine);
                }
            }

            protected void Page_Load(object sender, EventArgs e)
            {
                if (!IsPostBack)
                {
                    string currentPageUrl = HttpContext.Current.Request.Url.AbsoluteUri;
                    string rootUrl = "http://www.evopdf.com/demo/";

                    pdfBeforeHyperLink.NavigateUrl = rootUrl + "DemoAppFiles/Input/PDF_Files/Merge_Before_Conversion.pdf";
                    pdfAfterHyperLink.NavigateUrl = rootUrl + "DemoAppFiles/Input/PDF_Files/Merge_After_Conversion.pdf";

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

                    Master.CollapseAll();
                    Master.ExpandNode("HTML_to_PDF");
                    Master.ExpandNode("Headers_and_Footers");
                    Master.SelectNode("Header_Footer_in_External_PDF");
                }
            }

            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;
                }
            }
        }
    }