Can't get correct internet ip by using c#

Question

I did try to get internet IP by using GetIp method (below) but it only get one IP that's 123.22.114.5 , I restarted my modem many times but it still 123.22.114.5, please help me. (I'm using visual studio 2010 in windows 7 64bit)

(sorry about my bad english)

private string GetIp()
    {
        string extenalIp = "";
        string whatIsMyIp = "http://automation.whatismyip.com/n09230945.asp";
        string getIpRegex = @"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b";
        WebClient wc = new WebClient();
        UTF8Encoding utf8 = new UTF8Encoding();
        string requestHtml = "";
        try
        {
            requestHtml = utf8.GetString(wc.DownloadData(whatIsMyIp));
        }
        catch (Exception e)
        {
            // do some thing with exception
            Console.WriteLine(e.Message);
        }
        Regex r = new Regex(getIpRegex);
        Match m = r.Match(requestHtml);
        if (m.Success)
        {
            extenalIp = m.Value.ToString();
        }
        wc.Dispose();
        return extenalIp;
    }

You need to get the external ip, this question has a couple of solutions: http://stackoverflow.com/questions/3253701/c-sharp-get-public-external-ip-address — Sam Peacey, Jul 29 '12 at 08:06
David Schwartz: because that's not same with the ip when i visit whatismyip — tainguyen, Jul 29 '12 at 08:25

Anirudh Ramanathan · Answer 1 · 2012-07-29T08:14:09.470

1

You would get just one IP which is your ISP's external IP address, when you request some external website like whatismyip.

All ISPs have limited static IP addresses and hosts facing the internet. That WAN IP address is shared among many users usually.

The IP you see there is completely different from your local IP address, and hence, restarting your modem won't change it.

edited Jul 29 '12 at 08:14

answered Jul 29 '12 at 08:05

Anirudh Ramanathan

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Which IP are you trying to retrieve? – Anirudh Ramanathan Jul 29 '12 at 16:13
i want to retrieve the ip like what i see in whatismyip – tainguyen Jul 30 '12 at 03:06
i want to retrieve the ip like what i see in whatismyip (**184.95.55.21** is what i see in whatismyip but when i use this code, it just retrive **123.22.114.5**) what's wrong in my code? – tainguyen Jul 30 '12 at 03:12
Are you using some proxy in your browser? Your code appears all right and works fine for me. – Anirudh Ramanathan Jul 30 '12 at 03:54
i don't any proxy in my browser – tainguyen Jul 30 '12 at 06:38
Well, then there is no reason why a different IP is returned. Try fetching the same `whatismyip` home-page using your application code. – Anirudh Ramanathan Jul 30 '12 at 07:28

Can't get correct internet ip by using c#

1 Answers1