C#擷取本機內網外網IP

標籤：c#   擷取本機   內網   外網   ip   

using System.Net;        //擷取本地ip地址        public String GetLocalIpAddress()        {            IPAddress[] names = Dns.GetHostAddresses(Dns.GetHostName());            if (Dns.GetHostAddresses(Dns.GetHostName()).Length > 1)                return Dns.GetHostAddresses(Dns.GetHostName())[1].ToString();            else                return Dns.GetHostAddresses(Dns.GetHostName())[0].ToString();        }

<span style="white-space:pre"></span>//擷取外網ip地址        public string GetExtenalIpAddress()        {            try            {                //從網址中擷取本機ip資料                System.Net.WebClient client = new System.Net.WebClient();                client.Encoding = System.Text.Encoding.Default;                string reply = client.DownloadString("http://1111.ip138.com/ic.asp");   //"http://www.ip138.com"                //提取外網ip資料 [218.104.71.178]                int i1 = reply.IndexOf("["), i2 = reply.IndexOf("]");                string IP = reply.Substring(i1 + 1, i2 - 1 - i1);                if (!IP.Equals("")) return IP;            }            catch (Exception) { }            return "未擷取到外網ip";        }

C#擷取本機內網外網IP