C# 获取外网IP和运营商和城市

/// <summary>

/// 获取客户端外网IP，省份，城市，运营商

/// 2012年12月18日 15:07

/// </summary>

public class GetOutMessage

{

/// <summary>

/// 获取全部信息

/// </summary>

/// <returns>一段网页代码</returns>

private static string getOutMessage()

{

WebClient client = new WebClient();

client.Credentials = CredentialCache.DefaultCredentials;

client.Headers.Set("User-Agent", "Microsoft Internet Explorer");

client.Encoding = System.Text.Encoding.Default;

string response = client.UploadString("http://iframe.ip138.com/ipcity.asp", "");

Match mc = Regex.Match(response, @"location.href=""(.*)""");

response = client.UploadString(mc.Groups[1].Value, "");

return response;

}

/// <summary>

/// 外网IP

/// </summary>

/// <returns>外网IP地址</returns>

public static string getOutIp()

{

string response = getOutMessage();

int i = response.IndexOf("[") + 1;

string ip = response.Substring(i, 14);

string ips = ip.Replace("]", "").Replace(" ", "");

return ips;

}

/// <summary>

/// 省份

/// </summary>

/// <returns>省份</returns>

public static string getOutProvince()

{

string response = getOutMessage();

int i = response.IndexOf("自") + 2;

string province = response.Substring(i, response.IndexOf("省") - i + 1);

return province;

}

/// <summary>

/// 城市

/// </summary>

/// <returns>城市</returns>

public static string getOutCity()

{

string response = getOutMessage();

int i = response.IndexOf("省") + 1;

string city = response.Substring(i, response.IndexOf("市") - i + 1);

return city;

}

/// <summary>

/// 运营商

/// </summary>

/// <returns>运营商</returns>

public static string getOutProvider()

{

string response = getOutMessage();

int i = response.IndexOf("市") + 2;

string provider = response.Substring(i, 2);

return provider;

}

}