Getting valid IP from IPHostEntry

Question

I tried to get the IPAddress of my computer using this

        var ipadd = Dns.GetHostEntry(Dns.GetHostName());
        foreach (var ipAddress in ipadd.AddressList)
            Console.WriteLine("IP Address: {0}", ipAddress);

I have only one network card in my computer which is connected to the router. It is ipv4 but this line of code gives me 4 IPAddress 3 of them are ipv6 and one is ipv4 which is the valid one. I like to ask why is that so ?

Thanks

@kane, I dont know.. may be they are but I am on a ipv4 network. see this screenshot http://i51.tinypic.com/1zw0tv5.png — Ahmed, Feb 20 '11 at 11:58
@geek, Yes.. I need that only.. also when I am connected to only one network then why it is showing up 4 ipaddresses. — Ahmed, Feb 20 '11 at 16:45

score 4 · Accepted Answer · answered Feb 20 '11 at 21:43

4

foreach (var addr in Dns.GetHostEntry(string.Empty).AddressList)
{
    if (addr.AddressFamily == AddressFamily.InterNetwork)
        Console.WriteLine("IPv4 Address: {0}", addr)
}

answered Feb 20 '11 at 21:43

Richard Schneider

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Thanks it works.. you are using "Dns.GetHostEntry(string.Empty)" and I have seen on other places that they use "Dns.GetHostEntry(Dns.GetHostName());"... It doesn't matter if pass Dns.GetHostName() or not ? – Ahmed Feb 21 '11 at 14:11

Getting valid IP from IPHostEntry

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