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用户信息表，是大多数系统都有的。我们也知道，通常都会有类似 注册IP 和 最后登录IP 这两个的字段，来存储用户注册时候的IP地址和最后登录的IP的地址。 获取这样的地址，在后台显示 xxx.xxx.xxx.xxx 的地址段，让人看到很不自然，根本就不知道具体地理位置。 现在我们就简单的实现一下这个功能。  用到了#d7975ee489e20eaf3553027e770353fc# 这个组件，作者阿不。（谢谢他的共享）  还要去下载最新的纯真IP地址库，下载获得QQWry.dat  最后请出Js中的小靓妞，jquery-1.3.1.js  新建Web项目AjaxIP，将QQWry.dat添加到App_Data下。  然后添加QQWry.NET的组件类，如下：  。

复制代码代码如下

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;  using System.Collections.Generic;  using System.Text;  using System.IO;  using System.Text.RegularExpressions;  using System.Net;  using System.Net.Sockets;  namespace AjaxIP  {  public class IPLocation  {  public string IP { get; set; }  public string Country { get; set; }  public string Local { get; set; }  }  public class QQWryLocator  {  static Encoding encoding = Encoding.GetEncoding("GB2312");  private byte[] data;  int firstStartIpOffset;  int lastStartIpOffset;  int ipCount;  public int Count { get { return ipCount; } }  public QQWryLocator(string dataPath)  {  using (FileStream fs = new FileStream(dataPath, FileMode.Open, FileAccess.Read, FileShare.Read))  {  data = new byte[fs.Length];  fs.Read(data, 0, data.Length);  }  firstStartIpOffset = (int)data[0] + (((int)data[1]) << 8) + (((int)data[2]) << 16) + (((int)data[3]) << 24);  lastStartIpOffset = (int)data[4] + (((int)data[5]) << 8) + (((int)data[6]) << 16) + (((int)data[7]) << 24);  ipCount = (lastStartIpOffset - firstStartIpOffset) / 7 + 1;  if (ipCount <= 1)  {  throw new ArgumentException("ip FileDataError");  }  }  public static uint IpToInt(string ip)  {  //string[] strArray = ip.Split('.');  //return (uint.Parse(strArray[0]) << 24) + (uint.Parse(strArray[1]) << 16) + (uint.Parse(strArray[2]) << 8) + uint.Parse(strArray[0]);  //return (uint)IPAddress.HostToNetworkOrder((int)(IPAddress.Parse(ip).Address));  byte[] bytes = IPAddress.Parse(ip).GetAddressBytes();  return (uint)bytes[3] + (((uint)bytes[2]) << 8) + (((uint)bytes[1]) << 16) + (((uint)bytes[0]) << 24);  }  public static string IntToIP(uint ip_Int)  {  return new IPAddress(ip_Int).ToString();  }  public IPLocation Query(string ip)  {  IPAddress address = IPAddress.Parse(ip);  if (address.AddressFamily != AddressFamily.InterNetwork)  {  throw new ArgumentException("不支持非IPV4的地址");  }  if (IPAddress.IsLoopback(address))  {  return new IPLocation() { IP = ip, Country = "本机内部环回地址", Local = string.Empty };  }  uint intIP = (uint)IPAddress.HostToNetworkOrder((int)address.Address);  //if ((((intIP >= IpToInt("0.0.0.0")) && (intIP <= IpToInt("2.255.255.255"))) || ((intIP >= IpToInt("64.0.0.0")) && (intIP <= IpToInt("126.255.255.255")))) ||  //((intIP >= IpToInt("58.0.0.0")) && (intIP <= IpToInt("60.255.255.255"))))  //if (intIP <= 50331647 || (intIP >= 1073741824 && intIP <= 2130706431) || (intIP >= 973078528 && intIP <= 1023410175))  //{  // return new IPLocation() { IP = ip, Country = "网络保留地址", Local = string.Empty };  //}  IPLocation ipLocation = new IPLocation() { IP = ip };  uint right = (uint)ipCount;  uint left = 0;  uint middle = 0;  uint startIp = 0;  uint endIpOff = 0;  uint endIp = 0;  int countryFlag = 0;  while (left < (right - 1))  {  middle = (right + left) / 2;  startIp = GetStartIp(middle, out endIpOff);  if (intIP == startIp)  {  left = middle;  break;  }  if (intIP > startIp)  {  left = middle;  }  else  {  right = middle;  }  }  startIp = GetStartIp(left, out endIpOff);  endIp = GetEndIp(endIpOff, out countryFlag);  if ((startIp <= intIP) && (endIp >= intIP))  {  string local;  ipLocation.Country = GetCountry(endIpOff, countryFlag, out local);  ipLocation.Local = local;  }  else  {  ipLocation.Country = "未知";  ipLocation.Local = string.Empty;  }  return ipLocation;  }  private uint GetStartIp(uint left, out uint endIpOff)  {  int leftOffset = (int)(firstStartIpOffset + (left * 7));  endIpOff = (uint)data[4 + leftOffset] + (((uint)data[5 + leftOffset]) << 8) + (((uint)data[6 + leftOffset]) << 16);  return (uint)data[leftOffset] + (((uint)data[1 + leftOffset]) << 8) + (((uint)data[2 + leftOffset]) << 16) + (((uint)data[3 + leftOffset]) << 24);  }  private uint GetEndIp(uint endIpOff, out int countryFlag)  {  countryFlag = data[4 + endIpOff];  return (uint)data[endIpOff] + (((uint)data[1 + endIpOff]) << 8) + (((uint)data[2 + endIpOff]) << 16) + (((uint)data[3 + endIpOff]) << 24);  }  /// <summary>  /// Gets the country.  /// </summary>  /// <param name="endIpOff">The end ip off.</param>  /// <param name="countryFlag">The country flag.</param>  /// <param name="local">The local.</param>  /// <returns>country</returns>  private string GetCountry(uint endIpOff, int countryFlag, out string local)  {  string country = string.Empty;  uint offset = endIpOff + 4;  switch (countryFlag)  {  case 1:  case 2:  country = GetFlagStr(ref offset, ref countryFlag, ref endIpOff);  offset = endIpOff + 8;  local = (1 == countryFlag) ? string.Empty : GetFlagStr(ref offset, ref countryFlag, ref endIpOff);  break;  default:  country = GetFlagStr(ref offset, ref countryFlag, ref endIpOff);  local = GetFlagStr(ref offset, ref countryFlag, ref endIpOff);  break;  }  return country;  }  private string GetFlagStr(ref uint offset, ref int countryFlag, ref uint endIpOff)  {  int flag = 0;  while (true)  {  flag = data[offset];  //没有重定向  if (flag != 1 && flag != 2)  {  break;  }  if (flag == 2)  {  countryFlag = 2;  endIpOff = offset - 4;  }  offset = (uint)data[1 + offset] + (((uint)data[2 + offset]) << 8) + (((uint)data[3 + offset]) << 16);  }  if (offset < 12)  {  return string.Empty;  }  return GetStr(ref offset);  }  /// <summary>  /// 读取字符串...  /// </summary>  /// <param name="offset"></param>  /// <returns></returns>  private string GetStr(ref uint offset)  {  byte lowByte = 0;  byte highByte = 0;  StringBuilder stringBuilder = new StringBuilder(16);  while (true)  {  lowByte = data[offset++];  if (lowByte == 0)  {  return stringBuilder.ToString();  }  if (lowByte > 0x7f)  {  highByte = data[offset++];  if (highByte == 0)  {  return stringBuilder.ToString();  }  stringBuilder.Append(encoding.GetString(new byte[] { lowByte, highByte }));  }  else  {  stringBuilder.Append((char)lowByte);  }  }  }  }  }  。

再来新建 IPSearch.ashx 文件，如下：  。

复制代码代码如下

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;  using System.Collections;  using System.Data;  using System.Linq;  using System.Web;  using System.Web.Services;  using System.Web.Services.Protocols;  using System.Xml.Linq;  namespace AjaxIP  {  /// <summary>  /// IP查询 的摘要说明  /// </summary>  public class IPSearch : IHttpHandler  {  public void ProcessRequest(HttpContext context)  {  context.Response.ContentType = "text/plain";  string ip = context.Request["ip"];  string ipFilePath = @"\App_Data\QQWry.dat";  QQWryLocator QQWry = new QQWryLocator(ipFilePath);  IPLocation loc = QQWry.Query(ip);  context.Response.Write(string.Format("{0} {1}",loc.Country,loc.Local));  }  public bool IsReusable  {  get  {  return false;  }  }  }  }  。

最后在Default.aspx页面写下，js和有IP的用户信息，如下：  。

复制代码代码如下

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  <html xmlns="http://www.w3.org/1999/xhtml" >  <head runat="server">  <title></title>  <script language="javascript" src="Js/jquery-1.3.1.js"></script>  <script language="javascript">  $(document).ready(function() {  $("#tb tr").each(function() {  var obj = $(this).children("td:eq(2)");  SearchIP(obj);  });  })  function SearchIP(obj) {  $.ajax({  type: "GET",  url: "IPSearch.ashx?ip=" + obj.text(),  success: function(data) {  obj.text(data);  }  });  }  </script>  </head>  <body>  <form id="form1" runat="server">  <div>  <table id="tb" style="width:100%;">  <thead>  <th>321321</th>  <th>321321</th>  <th>321321</th>  </thead>  <tr>  <td>  OMEGA</td>  <td>  0</td>  <td>  122.229.191.8</td>  </tr>  <tr>  <td>  荒年</td>  <td>  900,000</td>  <td>  110.87.98.30</td>  </tr>  <tr>  <td>  寒妃</td>  <td>  1,854,257,979</td>  <td>  220.188.193.72</td>  </tr>  <tr>  <td>  哈小土</td>  <td>  600,100</td>  <td>  220.188.193.72</td>  </tr>  <tr>  <td>  化妆造型</td>  <td>  400,100</td>  <td>  220.188.193.72</td>  </tr>  </table>  </div>  </form>  </body>  </html>  。

这样我们的后台用户信息不再是不友好的IP地址段了。 运行一下，看看效果吧. 。

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