IPFindAddr.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections.Generic;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
///

/// IPFindAddr 的摘要说明
///

public class IPFindAddr
{
///

/// 数据库联接
///

public static OleDbConnection OleConn
{
get {
return new OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;Jet OLEDB:Database Password=;Data Source=" + AppDomain.CurrentDomain.BaseDirectory + "\\App_Data\\IP.mdb"); //Access数据库连接字符串
}
}
///

/// 获取真实地址
///

public static string GetAddr
{
get {
string DiZhi = "未知网络";
OleDbConnection Conn = OleConn;
try
{
string IP = IPToInt(HttpContext.Current.Request.UserHostAddress).ToString();

Conn.Open();
object Obj = new OleDbCommand("select top 1 region from ip where IPN1<=" + IP + " and IPN2>=" + IP, Conn).ExecuteScalar();
if (Obj != null)
{
DiZhi = Obj.ToString();
}
}
catch { }
finally { Conn.Close(); }
return DiZhi;
}
}
public IPFindAddr()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
///

/// IP地址和数字之间转化的算法

///

/// 传入IP地址
///

public static uint IPToInt(string ipAddress)
{
string disjunctiveStr = ".,: ";
char[] delimiter = disjunctiveStr.ToCharArray();
string[] startIP = null;
for (int i = 1; i <= 5; i++)
{
startIP = ipAddress.Split(delimiter, i);
}
string a1 = startIP[0].ToString();
string a2 = startIP[1].ToString();
string a3 = startIP[2].ToString();
string a4 = startIP[3].ToString();
uint U1 = uint.Parse(a1);
uint U2 = uint.Parse(a2);
uint U3 = uint.Parse(a3);
uint U4 = uint.Parse(a4);
uint U = U1 << 24;
U += U2 << 16;
U += U3 << 8;
U += U4;
return U;
}
///

/// 数字和IP地址之间转化的算法
///

/// 传入IP地址
///
public static string IntToIP(uint ipAddress)
{
long ui1 = ipAddress & 0xFF000000;
ui1 = ui1 >> 24;
long ui2 = ipAddress & 0x00FF0000;
ui2 = ui2 >> 16;
long ui3 = ipAddress & 0x0000FF00;
ui3 = ui3 >> 8;
long ui4 = ipAddress & 0x000000FF;
string IPstr = "";
IPstr = System.Convert.ToString(ui1) + "." + System.Convert.ToString(ui2) + "." + System.Convert.ToString(ui3) + "." + System.Convert.ToString(ui4);
return IPstr;
}
}