C# 根据ip获取城市等相关信息

/// <summary>

/// 得到真实IP以及所在地详细信息（Porschev）

/// </summary>

/// <returns></returns>

public string GetIpDetails()

{

//设置获取IP地址和国家源码的网址

string url = "http://www.ip138.com/ips8.asp";

string regStr = "(?<=<td\\s*align=\\\"center\\\">)[^<]*?(?=<br/><br/></td>)";

//IP正则

string ipRegStr = "((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)";

//IP地址

string ip = string.Empty;

//国家

string country = string.Empty;

//省市

string adr = string.Empty;

//得到网页源码

string html = GetHtml(url);

Regex reg = new Regex(regStr, RegexOptions.None);

Match ma = reg.Match(html); html = ma.Value;

Regex ipReg = new Regex(ipRegStr, RegexOptions.None);

ma = ipReg.Match(html);

//得到IP

ip = ma.Value;

int index = html.LastIndexOf("：") + 1;

//得到国家

country = html.Substring(index);

adr = GetAdrByIp(ip);

return "IP：" + ip + " 国家：" + country + " 省市：" + adr;

}

/// <summary>

/// 通过IP得到IP所在地省市（Porschev）

/// </summary>

/// <param name="ip"></param>

/// <returns></returns>

public string GetAdrByIp(string ip)

{

string url = "http://www.cz88.net/ip/?ip=" + ip;

string regStr = "(?<=<span\\s*id=\\\"cz_addr\\\">).*?(?=</span>)";

//得到网页源码

string html = GetHtml(url);

Regex reg = new Regex(regStr, RegexOptions.None);

Match ma = reg.Match(html);

html = ma.Value;

string[] arr = html.Split(' ');

return arr[0];

}

/// <summary>

/// 获取HTML源码信息(Porschev)

/// </summary>

/// <param name="url">获取地址</param>

/// <returns>HTML源码</returns>

public string GetHtml(string url)

{

string str = "";

try

{

Uri uri = new Uri(url);

WebRequest wr = WebRequest.Create(uri);

Stream s = wr.GetResponse().GetResponseStream();

StreamReader sr = new StreamReader(s, Encoding.Default);

str = sr.ReadToEnd();

}

catch (Exception e)

{

}

return str;

}