c#实现根据网络IP显示地理位置功能示例

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.