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

using HiQPdfClient;

namespace HiQPdf_Demo
{
    public partial class PdfToHtmlConverter : System.Web.UI.Page
    {
        protected void buttonConvertPdfToHtml_Click(object sender, EventArgs e)
        {
            string serverIP = textBoxServerIP.Text;
            uint serverPort = uint.Parse(textBoxServerPort.Text);
            string serverPassword = textBoxServerPassword.Text;

            // get the PDF file
            string pdfFile = Server.MapPath("~") + @"\DemoFiles\Pdf\Presentation.pdf";

            // create the PDF to HTML converter
            PdfToHtml pdfToHtmlConverter = new PdfToHtml(serverIP, serverPort);

            // use server password if necessary
            if (serverPassword.Length > 0)
                pdfToHtmlConverter.ServerPassword = serverPassword;

            // set a demo serial number
            pdfToHtmlConverter.SerialNumber = "YCgJMTAE-BiwJAhIB-EhlWTlBA-UEBRQFBA-U1FOUVJO-WVlZWQ==";

            // set the conversion resolution in DPI
            pdfToHtmlConverter.DPI = int.Parse(textBoxDPI.Text);

            // set the zoom level
            pdfToHtmlConverter.Zoom = int.Parse(textBoxZoom.Text);

            int fromPdfPageNumber = int.Parse(textBoxFromPage.Text);
            int toPdfPageNumber = textBoxToPage.Text.Length > 0 ? int.Parse(textBoxToPage.Text) : 0;

            // convert a range of pages of the PDF document to HTML documents in memory
            // the HTML can also be produced to a folder using the ConvertToHtmlFiles method
            // or they can be produced one by one using the RaisePageConvertedToHtmlEvent method
            PdfPageHtmlCode[] htmlDocuments = pdfToHtmlConverter.ConvertToHtml(pdfFile, fromPdfPageNumber, toPdfPageNumber);

            // return if no page was converted
            if (htmlDocuments.Length == 0)
                return;

            // get the first page HTML bytes in a buffer
            byte[] htmlDocumentBuffer = null;
            try
            {
                // get the HTML document UTF-8 bytes
                htmlDocumentBuffer = Encoding.UTF8.GetBytes(htmlDocuments[0].HtmlCode);
            }
            finally
            {
                // dispose the HTML documents
                for (int i = 0; i < htmlDocuments.Length; i++)
                    htmlDocuments[i].Dispose();
            }

            // inform the browser about the binary data format
            HttpContext.Current.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");

            // let the browser know how to open the HTML document and the HTML document name
            HttpContext.Current.Response.AddHeader("Content-Disposition",
                String.Format("attachment; filename=Page.html; size={0}", htmlDocumentBuffer.Length.ToString()));

            // write the HTML document buffer to HTTP response
            HttpContext.Current.Response.BinaryWrite(htmlDocumentBuffer);

            // call End() method of HTTP response to stop ASP.NET page processing
            HttpContext.Current.Response.End();
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                string pageUri = HttpContext.Current.Request.Url.AbsoluteUri;
                hyperLinkOpenPdf.NavigateUrl = pageUri.Substring(0, pageUri.LastIndexOf('/')) + @"/DemoFiles/Pdf/Presentation.pdf";

                Master.SelectNode("pdfToHtml");

                Master.LoadCodeSample("PdfToHtml");
            }
        }
    }
}