How to get internet IP address from C# Windows App [duplicate]

This question already has answers here: Closed 12 years ago.

Possible Duplicates:

how to get my own IP address in C#?

how to get ip address of machine in c#

Hi all, I am currently developing 开发者_如何学Ca c# application for windows using WPF. I would like to get the computers external IP address i.e. the internet address not the local computer ip address or the local router address.

Thanks for your help.

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Like stated earlier, you need an external web server. An easy call to HTTP GET with the URL "http://checkip.dyndns.org/" will get you a simple text string with your IP.

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You need to have a web server sitting somewhere in the cloud so that you can call and that will be able to give you your external IP address.

Looks like this one is free.

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[EDIT] A simple request to here will get you your ip.

This is a way to get any network address (not necessarily the internet ip) as pointed out in the comments:

IPAddress host = IPAddress.None;
foreach (IPAddress ip in Dns.GetHostAddresses(Dns.GetHostName()))
    {
        host = ip;
        if (ip.AddressFamily == AddressFamily.InterNetwork)
             break;
    }

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The only way I have found is to do a httpWebRequest to http://www.whatismyip.com/automation/n09230945.asp and parse the results for the ip

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You can try connecting to whatismyip.com, as shown in the code below:

using System;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;

namespace DreamInCode.Snippets
{
    public class IpFinder
    {
        public static IPAddress GetExternalIp()
        {
            string whatIsMyIp = "http://whatismyip.com";
            string getIpRegex = @"(?<=<TITLE>.*)\d*\.\d*\.\d*\.\d*(?=</TITLE>)";
            WebClient wc = new WebClient();
            UTF8Encoding utf8 = new UTF8Encoding();
            string requestHtml = "";
            try
            {
                requestHtml = utf8.GetString(wc.DownloadData(whatIsMyIp));
            }
            catch (WebException we)
            {
                // do something with exception
                Console.Write(we.ToString());
            }
            Regex r = new Regex(getIpRegex);
            Match m = r.Match(requestHtml);
            IPAddress externalIp = null;
            if (m.Success)
            {
                externalIp = IPAddress.Parse(m.Value);
            }
            return externalIp;
        }
    }
}

NOTE: The code comes from this post http://www.dreamincode.net/forums/topic/24692-showing-the-external-ip-address-in-c%23/ .