C#获取本机局域网ip和公网ip

1。获取局域网ip

IPAddress ipAddr = Dns.Resolve(Dns.GetHostName()).AddressList[0];//获得当前IP地址

string ip=ipAddr.ToString() ;

2。获取公网ip

private static string GetIP()

{

    string tempip = "";

    try

    {

        WebRequest wr = WebRequest.Create("http://www.ip138.com/ips138.asp");

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

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

        string all = sr.ReadToEnd(); //读取网站的数据

        int start = all.IndexOf("您的IP地址是：[") + 9;

        int end = all.IndexOf("]", start);

        tempip = all.Substring(start, end - start);

        sr.Close();

        s.Close();

    }

    catch

    {

    }

    return tempip;

}

3.如果是ADSL上网，获取公网ip

string tempIP =string.Empty;
if (System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList.Length >1)
     tempIP = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList[1].ToString();

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C#获取本机局域网ip和公网ip

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