URL sharing across a network with ASP.NET

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.Text;
using System.Runtime.InteropServices;

namespace jm.Bookmarks
{
	/// <summary>
	/// Zusammendfassende Beschreibung f�r BookmarksTop.
	/// </summary>
	public class BookmarksTop : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Literal Literal1;
		protected System.Web.UI.WebControls.TextBox tbxPath;
		
		//Xml document variable
		private	XmlDocument _doc;
		//
		public string cFavoritesPath = @"E:\Documents and Settings\JMC\Favorites";
		protected System.Web.UI.WebControls.Button btnUpdate;
		public string cRootFolderName = "root";
	
		//This "old" Windows function allows us to read the content of the .url files
		[DllImport("KERNEL32.DLL",EntryPoint="GetPrivateProfileString")]
		protected internal static extern int GetPrivateProfileString(string lpAppName, 
			string lpKeyName, string lpDefault, 
			StringBuilder lpReturnedString, int nSize, 
			string lpFileName);

		private void Page_Load(object sender, System.EventArgs e)
		{
			if (!IsPostBack) 
			{
				tbxPath.Text = cFavoritesPath;			
				tbxPath.Font.Name = "verdana";
				//Ensure that the path is ended with a backslash "\"
				if (!cFavoritesPath.EndsWith(@"\"))
					cFavoritesPath += @"\";				
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: Dieser Aufruf ist f�r den ASP.NET Web Form-Designer erforderlich.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Erforderliche Methode f�r die Designerunterst�tzung. 
		/// Der Inhalt der Methode darf nicht mit dem Code-Editor ge�ndert werden.
		/// </summary>
		private void InitializeComponent()
		{    
			this.tbxPath.TextChanged += new System.EventHandler(this.tbxPath_TextChanged);
			this.btnUpdate.Click += new System.EventHandler(this.btnUpdate_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void tbxPath_TextChanged(object sender, System.EventArgs e)
		{
			cFavoritesPath = tbxPath.Text;
			//Ensure that the path is ended with a backslash "\"
			if (!cFavoritesPath.EndsWith(@"\"))
				cFavoritesPath += @"\";
		}

		private void btnUpdate_Click(object sender, System.EventArgs e)
		{
			//Get the path from the textbox
			cFavoritesPath = tbxPath.Text;

			//Ensure that the path is ended with a backslash "\"
			if (!cFavoritesPath.EndsWith(@"\"))
				cFavoritesPath += @"\";		

			//Get the root folder's name
			string cTemp = cFavoritesPath.Substring(0,cFavoritesPath.Length-1);
			int nLastIndex = cTemp.LastIndexOf(@"\");
			cRootFolderName = cTemp.Substring(nLastIndex+1);
			
			//Read all files from a given folder			
			if (Directory.Exists(cFavoritesPath))
			{
				Literal1.Text = "";
				//Create an XML document
				_doc = new XmlDocument();
				_doc.LoadXml("<folder></folder>");
				XmlNode root = _doc.DocumentElement;
				newElement(root,cRootFolderName, cFavoritesPath);
				GetFiles(root, cFavoritesPath);

				//Generate the XML declaration
				XmlDeclaration xmldecl = _doc.CreateXmlDeclaration("1.0","iso-8859-1",null);				
				_doc.InsertBefore(xmldecl, root);

				//Fill the XmlDocument with elements "folder" & "file"
				GetFolders(root,cFavoritesPath);
				
				//Save the xml document
				try
				{					
					_doc.Save(Server.MapPath("Bookmarks.xml"));			
				}
				catch (Exception ex)
				{
					Literal1.Text = ex.Message;
				}
			} 
			else
			{
				Literal1.Text = "The given path is not available.";
			}
		}

		private void GetFolders(XmlNode parentNode, string parentPath)
		{
			string [] subdirectoryEntries = Directory.GetDirectories(parentPath);
			foreach(string subdirectory in subdirectoryEntries)
			{
				int index = subdirectory.LastIndexOf(@"\");
				string cRootFolderName = subdirectory.Substring(index+1,subdirectory.Length-index-1);
				string cRelativePath = subdirectory.Substring(cFavoritesPath.Length);
				XmlElement elem = _doc.CreateElement("folder");
				XmlNode newChild = parentNode.AppendChild(elem);
				newElement(newChild, cRootFolderName, cRelativePath);
				GetFiles(newChild, subdirectory);
				GetFolders(newChild, subdirectory);
			}
		}

		private void GetFiles(XmlNode parentNode, string parentPath)
		{
			string [] fileEntries = Directory.GetFiles(parentPath);
			foreach(string fileName in fileEntries)
			{
				//If the file is a web shortcut, get the URL				
				
				//Check the extension of the file
				string cURL = "";
				int DotIndex = fileName.LastIndexOf(@".");
				string cExtension = fileName.Substring(DotIndex+1,fileName.Length-DotIndex-1);
				if (cExtension.CompareTo("url") == 0)
				{	
					StringBuilder buffer = new StringBuilder(256);
					if (buffer != null) 
					{
						int bufLen = GetPrivateProfileString("InternetShortcut", "URL", "", buffer, buffer.Capacity, fileName);
						cURL = buffer.ToString();

						//Get the name to be displayed: remove the full path & the '.url' extension
						int SlashIndex = fileName.LastIndexOf(@"\");
						string cDisplayName = fileName.Substring(SlashIndex+1,fileName.Length-SlashIndex-5);
						XmlElement elem = _doc.CreateElement("file");
						XmlNode newChild = parentNode.AppendChild(elem);
						newElement(newChild, cDisplayName, cURL);				
					}
				}
			}
		}

		//Create a new element in the XML file
		private void newElement(XmlNode parentNode, string Attributename, string Attributepath)
		{		
			XmlNode attrName = _doc.CreateNode(XmlNodeType.Attribute, "name", "");
			attrName.Value = Attributename;
			parentNode.Attributes.SetNamedItem(attrName);

			XmlNode attrPath = _doc.CreateNode(XmlNodeType.Attribute, "path", "");
			attrPath.Value = Attributepath;
			parentNode.Attributes.SetNamedItem(attrPath);
		}		
	}
}