Add Header and Footer In External PDF Documents

protected void convertToPdf()
{
    // 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);
}

/// <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);
    }
}