Retrieve information about your IP

/// ****************************************
/// * 		    Created by bEGI	           *
/// *  http://www.youtube.com/user/MCneun  *
/// *	       VB & C# Programmer	       *
/// ****************************************



using System;
using System.IO;
using System.Net;
using System.Data;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using System.ComponentModel;
using System.Collections.Generic;


namespace IP_Informations
{
    public partial class IPInfo : Form
    {
        string lookupData;

        public IPInfo()
        {
            InitializeComponent();
        }

        private void btLookup_Click(object sender, EventArgs e)
        {
            getIPInfos();
        }

        private void getIPInfos()
        {
            btLookup.Enabled = false;
            try
            {
                Uri ur = new Uri("http://www.find-ip-address.org/");
                System.Net.HttpWebRequest req = (System.Net.HttpWebRequest) System.Net.WebRequest.Create(ur);
                System.Net.HttpWebResponse res = (System.Net.HttpWebResponse) req.GetResponse();
                if (res.StatusCode == HttpStatusCode.OK)
                {
                    Stream receiveStream = res.GetResponseStream();
                    StreamReader readStream = null;
                    if (res.CharacterSet == null)
                    {
                        readStream = new StreamReader(receiveStream);
                    }
                    else
                    {
                        readStream = new StreamReader(receiveStream, Encoding.GetEncoding(res.CharacterSet));
                        string data = readStream.ReadToEnd();
                        res.Close();
                        readStream.Close();
                        string left = "My IP Country Name:";
                        string right = "IP Address Lookup Location";
                        int indexLeft = data.IndexOf(left);
                        int indexRight = data.IndexOf(right);
                        lookupData = data.Substring(indexLeft + left.Length, indexRight - indexLeft - left.Length);
                    }
                }

                labelCountry.Text = extractSubject(":&nbsp;&nbsp;<font color='#980000'> ", "</font>&nbsp;&nbsp;<img src='"); //COUNTRY NAME
                string myStr = extractSubject("</font>&nbsp;&nbsp;<img src='", "'><br><strong>My IP Country Continent<");
                string[] countryCode = myStr.Split(new string[] { "/" }, StringSplitOptions.RemoveEmptyEntries);
                labelCountry.Text += "(" + countryCode[2].Remove(2).ToUpper() + ")";
                textBoxExternal.Text = extractSubject(">My IP Address lookup</strong> for <b>", "</b> show IP which"); // MY IP ADDRESS
                textBoxInternal.Text = getInternalIP();
                textBoxCity.Text = extractSubject("City</b>:&nbsp;&nbsp; <font color='#980000'>", "</font><br><b>My IP Address Latitude</b>"); // IP ADDRESS CITY
                string tbRegion = extractSubject(")<br><br><strong>My IP Address Region</strong>: <font color='#980000'>", "</font><br><b>"); // MY ADDRESS REGION
                string[] str = tbRegion.Split('<');
                textBoxRegion.Text = str[0];
                textBoxISP.Text = extractSubject("Provider)</strong>:&nbsp;<font color='#980000'> ", "</font><br /"); // MY ISP PROVIDER
                textBoxTimeZone.Text = extractSubject("My Time zone</b>: ", "<br><b>My Local time"); // MY TIME ZONE
                textBoxLat.Text = extractSubject("My IP Address Latitude</b>: ", "<br><b>My IP Address Longtitude"); // MY IP ADDRESS LATITUDE
                textBoxLng.Text = extractSubject("My IP Address Longtitude</b>: ", "<br><br><strong>My ISP"); // MY IP ADDRESS LONGTITUDE

                pictureBoxFlag.Load("http://www.find-ip-address.org/" + extractSubject("</font>&nbsp;&nbsp;<img src='", "'><br><strong>My IP Country Continent<")); // COUNTRY FLAG
            }
            catch
            {
            }
            btLookup.Enabled = true;
        }

        private string extractSubject(string left, string right)
        {
            try
            {
                int indexLeft = lookupData.IndexOf(left);
                int indexRight = lookupData.IndexOf(right);
                return lookupData.Substring(indexLeft + left.Length, indexRight - indexLeft - left.Length);
            }
            catch
            {
                return "Unable to retrieve!";
            }
        }

        private string getInternalIP()
        {
            try
            {
                IPHostEntry iphostentry = System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName());
                return ((System.Net.IPAddress)iphostentry.AddressList.GetValue(0)).ToString();
            }
            catch
            {
                return "Unable to retrieve!";
            }
        }
    }
}