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 Page_Numbers_in_HTML : 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;

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

            // Optionally add a space between footer and the page body
            // Leave this option not set for no spacing
            htmlToPdfConverter.PdfDocumentOptions.BottomSpacing = float.Parse(footerSpacingTextBox.Text);

            // Set the footer height in points
            htmlToPdfConverter.PdfFooterOptions.FooterHeight = 50;

            // ----- Add HTML with Page Numbering to Footer -----

            // Create a variable HTML element with page numbering
            string htmlStringWithPageNumbers = htmlWithPageNumbersTextBox.Text;
            string baseUrl = baseUrlTextBox.Text;
            HtmlToPdfVariableElement footerHtmlWithPageNumbers = new HtmlToPdfVariableElement(htmlStringWithPageNumbers, baseUrl);

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

            // Add variable HTML element with page numbering to footer
            htmlToPdfConverter.PdfFooterOptions.AddElement(footerHtmlWithPageNumbers);

            // Optionally draw a line at the top of the footer
            if (drawFooterLineCheckBox.Checked)
            {
                // 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);
            }

            // Convert the HTML page to a PDF document in a memory buffer
            byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(urlTextBox.Text);

            // 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=Page_Numbers_in_HTML.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/";

                string htmlWithPageNumbers = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/HTML_Files/Page_Numbers_in_HTML.html"));

                htmlWithPageNumbersTextBox.Text = htmlWithPageNumbers;
                baseUrlTextBox.Text = rootUrl + "DemoAppFiles/Input/HTML_Files/";

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

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

        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;
            }
        }
    }
}