根据IP获取省市

/// <summary>
/// 根据IP获取省市
/// </summary>
public void GetAddressByIp()
{
string ip = "115.193.217.249";
string PostUrl = "http://int.dpool.sina.com.cn/iplookup/iplookup.php?ip=" + ip;
string res = GetDataByPost(PostUrl);//该条请求返回的数据为：res=1\t115.193.210.0\t115.194.201.255\t中国\t浙江\t杭州\t电信

string[] arr = getAreaInfoList(res);
}

/// <summary>
/// Post请求数据
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
public string GetDataByPost(string url)
{
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);

HttpWebResponse res = (HttpWebResponse)req.GetResponse();
Stream stream = res.GetResponseStream();
StreamReader sr = new StreamReader(res.GetResponseStream(), System.Text.Encoding.Default);
string backstr = sr.ReadToEnd();
sr.Close();
res.Close();
return backstr;
}

/// <summary>
/// 处理所要的数据
/// </summary>
/// <param name="ip"></param>
/// <returns></returns>
public static string[] getAreaInfoList(string ipData)
{
//1\t115.193.210.0\t115.194.201.255\t中国\t浙江\t杭州\t电信
string[] areaArr = new string[10];
string[] newAreaArr = new string[2];
try
{
//取所要的数据，这里只取省市
areaArr = ipData.Split('\t');
newAreaArr[0] = areaArr[4];//省
newAreaArr[1] = areaArr[5];//市
}
catch (Exception e)
{
// TODO: handle exception
}
return newAreaArr;
}