C# to get your local IP address when online.

This quick function returns your local IP address or an empty string if not connected or no ip address is found. Requires a "using System.Net;" statement.

        /// <summary>

        /// returns the first local IP address that's connected to the network

        /// only if it's connected to the network.

        /// </summary>

        /// <returns></returns>

        private string getLocalIPAddress()

        {

            string ret = "";

            // Are we connected to the network?

            if (System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable())

            {

                // get a list of local addresses

                var addrs = Dns.GetHostAddresses(Dns.GetHostName());

                foreach (IPAddress ip in addrs)

                {

                    // is this an IPv4 address?

                    if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)

                    {

                        // that's the one

                        ret = ip.ToString();

                        break;

                    }

                }

            }

            return ret;

        }