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

    using System.Drawing;
    using System.Text;

    // Use EVO PDF Namespace
    using EvoPdfClient;

    namespace EvoHtmlToPdfDemo.HTML_to_PDF.HTML_Elements_Location
    {
        public partial class Select_in_HTML_Elements_to_Retrieve : 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;

                Document pdfDocument = null;

                // Convert HTML page or string with mapping attributes to a PDF document object
                // The document can be further modified to highlight the selected elements
                if (convertHtmlRadioButton.Checked)
                {
                    string htmlWithMappingAttributes = htmlStringTextBox.Text;
                    string baseUrl = baseUrlTextBox.Text;

                    // Convert a HTML string with mapping attributes to a PDF document object
                    pdfDocument = htmlToPdfConverter.ConvertHtmlToPdfDocumentObject(htmlWithMappingAttributes, baseUrl);
                }
                else
                {
                    string url = urlTextBox.Text;

                    // Convert a HTML page with mapping attributes to a PDF document object
                    pdfDocument = htmlToPdfConverter.ConvertUrlToPdfDocumentObject(url);
                }

                // Display detailed information about the selected elements
                StringBuilder htmlElementInfoBuilder = new StringBuilder();
                for (int mappingIndex = 0; mappingIndex < htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.Count; mappingIndex++)
                {
                    HtmlElementMapping htmlElementInfo = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetByIndex(mappingIndex);

                    // Get other information about HTML element
                    string htmlElementTagName = htmlElementInfo.HtmlElementTagName;
                    string htmlElementID = htmlElementInfo.HtmlElementId;
                    string htmlElementMappingID = htmlElementInfo.MappingId;
                    string htmlElementCssClasssName = htmlElementInfo.HtmlElementCssClassName;
                    string htmlElementHtmlCode = htmlElementInfo.HtmlElementOuterHtml;
                    string htmlElementInnerHtml = htmlElementInfo.HtmlElementInnerHtml;
                    string htmlElementText = htmlElementInfo.HtmlElementText;
                    NameValuePairsCollection htmlElementAttributes = htmlElementInfo.HtmlElementAttributes;
                    PdfRectangle[] htmlElementRectanglesInPdf = htmlElementInfo.PdfRectangles;

                    htmlElementInfoBuilder.AppendFormat("<br/>---------------------------------------- HTML Element Info ----------------------------------------<br/><br/>");
                    htmlElementInfoBuilder.AppendFormat("<b>Tag Name:</b> {0}<br/>", htmlElementTagName);
                    htmlElementInfoBuilder.AppendFormat("<b>Element ID:</b> {0}<br/>", htmlElementID);
                    htmlElementInfoBuilder.AppendFormat("<b>Mapping ID:</b> {0}<br/>", htmlElementMappingID);
                    htmlElementInfoBuilder.AppendFormat("<b>Text:</b> {0}<br/>", htmlElementText);

                    htmlElementInfoBuilder.AppendFormat("<b>Attributes:</b><br/>");
                    for (int i = 0; i < htmlElementAttributes.Count; i++)
                    {
                        NameValuePair nameValuePair = htmlElementAttributes.GetByIndex(i);
                        htmlElementInfoBuilder.AppendFormat("&nbsp;&nbsp;&nbsp;{0} = \"{1}\"<br/>", nameValuePair.Name, nameValuePair.Value);
                    }

                    htmlElementInfoBuilder.AppendFormat("<b>Location in PDF:</b><br/>");
                    for (int i = 0; i < htmlElementRectanglesInPdf.Length; i++)
                    {
                        PdfPage pdfPage = pdfDocument.GetPage(htmlElementRectanglesInPdf[i].PageIndex);
                        int pdfPageIndex = htmlElementRectanglesInPdf[i].PageIndex;
                        RectangleFloat rectangleInPdfPage = htmlElementRectanglesInPdf[i].Rectangle;

                        htmlElementInfoBuilder.AppendFormat("&nbsp;&nbsp;&nbsp;PDF Page Index: {0}<br>", pdfPageIndex);
                        htmlElementInfoBuilder.AppendFormat("&nbsp;&nbsp;&nbsp;Rectangle: X = {0:N2} pt , Y = {1:N2} pt , W = {2:N2} pt , H = {3:N2} pt<br/>",
                                rectangleInPdfPage.X, rectangleInPdfPage.Y, rectangleInPdfPage.Width, rectangleInPdfPage.Height);
                    }

                    htmlElementInfoBuilder.AppendFormat("<br/>");
                }

                PdfPage lastPdfPage = pdfDocument.GetPage(htmlToPdfConverter.ConversionSummary.LastPageIndex);
                RectangleFloat lastPageRectangle = htmlToPdfConverter.ConversionSummary.LastPageRectangle;

                HtmlToPdfElement htmlElementInfoHtml = new HtmlToPdfElement(0, lastPageRectangle.Y + lastPageRectangle.Height + 1, htmlElementInfoBuilder.ToString(), null);
                lastPdfPage.AddElement(htmlElementInfoHtml);

                // 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=Select_in_HTML_Elements_to_Retrieve.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/HTML_Elements_Info.html"));
                    baseUrlTextBox.Text = rootUrl + "DemoAppFiles/Input/HTML_Files/";

                    urlTextBox.Text = rootUrl + "DemoAppFiles/Input/HTML_Files/HTML_Elements_Info.html";

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

                    Master.CollapseAll();
                    Master.ExpandNode("HTML_to_PDF");
                    Master.ExpandNode("HTML_Elements_Location_in_PDF");
                    Master.SelectNode("Select_in_HTML_Elements_to_Retrieve");
                }
            }

            protected void convertHtmlRadioButton_CheckedChanged(object sender, EventArgs e)
            {
                urlPanel.Visible = convertUrlRadioButton.Checked;
                htmlStringPanel.Visible = !convertUrlRadioButton.Checked;
            }

            protected void convertUrlRadioButton_CheckedChanged(object sender, EventArgs e)
            {
                urlPanel.Visible = convertUrlRadioButton.Checked;
                htmlStringPanel.Visible = !convertUrlRadioButton.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;
                }
            }

            protected void viewHtmlLinkButton_Click(object sender, EventArgs e)
            {
                Response.Redirect(urlTextBox.Text);
            }
        }
    }