Extracting country and city name from IP address

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Introduction

Sometimes we want to get visitor details to know visits our website. This sample describes how to translate IP addresses to find the country and city where it comes from.

Background

I spent a whole day to translate the IP database to English, but some fields did not come out very well. I hope somebody can help me improve the IP database.

Using the code

Here are three parts of the code which includes the logic layer, data layer, and the control layer. If you want to run the sample in your local host, you must copy IP.mdb to drive c:\.

// Part 1.
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace Treaple.com
{
    public partial class Form1 : Form
    {
        private CompareIP compareIP = null;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            compareIP = new CompareIP();

            string Ip = txtIP.Text.Trim();
            string[] Ip_List = Ip.Split(".".ToCharArray());
            string X_Ip = "";

            foreach (string ip in Ip_List)
            {
                if (Convert.ToInt16(ip) < 16)
                    X_Ip += "0" + Convert.ToInt16(ip).ToString("x");
                else
                    X_Ip += Convert.ToInt16(ip).ToString("x");
            }

            long N_Ip = long.Parse(X_Ip, 
                System.Globalization.NumberStyles.HexNumber);
            compareIP.IPAddress = N_Ip;
            DataSet newdata = compareIP.GetIP();
            try
            {
                txtCountry.Text = newdata.Tables[0].Rows[0][2].ToString();
                txtCity.Text = newdata.Tables[0].Rows[0][3].ToString();
            }
            catch
            {
                MessageBox.Show("Invalid Ip address!");
            }
        }
    }
}
 
// Part2.
 
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;

namespace Treaple.com
{
    //////////////////////Base Class///////////////////////
    public abstract class DataExchange
    {
        public IPAccessDataBase accessDataBase;
        public abstract int AddData();
        public abstract int ChangeData();
        public abstract DataSet GetData();
    }

    //////////////////////Sub Class////////////////////////

    public class CompareIP
    {
        public IPAccessDataBase iPAccessDataBase;
        public long IPAddress;

        public CompareIP()
        {
            iPAccessDataBase = new IPAccessDataBase();
        }

        public DataSet GetIP()
        {
            return iPAccessDataBase.SelectData(
                "select * from address where " + this.IPAddress + 
                " >=ip1 and " + this.IPAddress + 
                " <= ip2", "address");
        }
    }
}
 
// Part 3 
 
using System;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;

namespace Treaple.com
{
    /// </summary>
    public class IPAccessDataBase
    {
        private string strSQL;

        private string connectionString = 
          "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" +"c:\\"+("IP.MDB");

        private OleDbConnection myConnection;
        private OleDbCommandBuilder sqlCmdBld;
        private OleDbDataAdapter da;

        private DataSet ds = new DataSet();

        public IPAccessDataBase()
        {
        }

        public IPAccessDataBase(string conStr)
        {
            connectionString = conStr;
        }

        public DataSet SelectData(string tempStrSQL, string tempTableName)
        {
            this.strSQL = tempStrSQL;
            this.myConnection = new OleDbConnection(connectionString);
            this.da = new OleDbDataAdapter(this.strSQL, this.myConnection);
            this.ds.Clear();
            this.da.Fill(ds, tempTableName);
            return ds;
        }

        public DataSet UpdateData(DataSet changedDataSet, string tableName)
        {
            this.myConnection = new OleDbConnection(connectionString);
            this.da = new OleDbDataAdapter(this.strSQL, this.myConnection);
            this.sqlCmdBld = new OleDbCommandBuilder(da);
            this.da.Update(changedDataSet, tableName);
            return changedDataSet;
        } 

        public DataTable SelectData(string tempStrSQL)
        {
            this.myConnection = new OleDbConnection(connectionString);
            DataSet tempDataSet = new DataSet();
            this.da = new OleDbDataAdapter(tempStrSQL, this.myConnection);
            this.da.Fill(tempDataSet);
            return tempDataSet.Tables[0];
        }

        public int UpdateData(string tempStrSQL)
        {
            OleDbConnection myConnection = new OleDbConnection(
                connectionString);
            OleDbCommand myCommand = new OleDbCommand(tempStrSQL);
            myCommand.Connection = myConnection;
            myConnection.Open();
            int intNumber = myCommand.ExecuteNonQuery();
            myCommand.Connection.Close();
            myConnection.Close();
            return intNumber;
        }
    }
}