using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Xml;
using System.Xml.Xsl;


namespace RSSClient
{
	public partial class XMLDisplay : System.Web.UI.Page
	{
		/// <summary>
		/// The transformed HTML content
		/// </summary>
		protected string text = "";

		protected void Page_Load(object sender, System.EventArgs e)
		{
			//retrieve sourceURL from session
			string sourceURL = Session["sourceURL"] as string;
			if (sourceURL != null)
			{
				string path = Request.Url.AbsoluteUri;
				int lastSlash = path.LastIndexOf("/");
				string xsltURL = path.Substring(0, lastSlash) + "/rss.xsl";
				//transform RSS to HTML
				text = RSSToHTML(sourceURL, xsltURL);
			}
			else
				text = "Please choose an RSS Feed";
		}

		#region VS.NET generated code
		override protected void OnInit(EventArgs e)
		{
			InitializeComponent();
			base.OnInit(e);
		}
		
		private void InitializeComponent()
		{    
		}
		#endregion

		public static string RSSToHTML(string sourceURL, string xsltURL)
		{
			//source
			XmlTextReader reader = new XmlTextReader(sourceURL);
			XmlDataDocument document = new XmlDataDocument();
			document.Load(reader);

			//target
			StringWriter stw = new StringWriter();
			XmlTextWriter xmlTextWriter = new XmlTextWriter(stw);
			xmlTextWriter.Formatting = Formatting.Indented;

			//transformation
			XslTransform xslt = new XslTransform();
			xslt.Load(xsltURL);
			xslt.Transform(document, null, xmlTextWriter, null);
			
			//return transformed result
			return stw.GetStringBuilder().ToString();
		}

	}
}