How to detect external IP with simple c# code (kind of like www.whatismyip.com)

Question

What ever needs to be done I gave up on my static IP because it was too expansive but I can still do webhost if my computer checks my ip every 2 minutes and if different update some file and automate changes to php html files etc. I just need to detect my External IP with c# not local ip like 192.168.1.1. Thanks!!!!

Roy S · Answer

This link will probably give you the answer: http://stackoverflow.com/questions/1069103/how-to-get-my-own-ip-address-in-c See the second or third answer. Basically they're downloading the content of a site which shows their ip. string IP; using (WebClient webClient = new WebClient()) { IP = webClient.DownloadString(http://checkip.dyndns.org/); IP = IP.Remove(IP.IndexOf( )).Substring(IP.IndexOf(Address: ) + 9); }

jofi jof · Answer

I don't know about find External IP with c#. But easy way to find external IP address from IP-Details.com

thiago costa · Answer

Here is a sample of what I was trying to achieve !!!!!!!! Code written with Visual Studio 2010 Functions: 1)Detect current external IP at startup 2)Display in textbox log if ip changed or not every 5 seconds 3)if ip changes execute something (what ever you program it to) ENJOY !!!! <3

thiago costa · Answer

I love you !!!!!!!!! This works !!!!!!!!! I just had to modify it a little bit because I am working in windoes forms private void button2_Click(object sender EventArgs e) { //string GetPublicIP; String direction = ; WebRequest request = WebRequest.Create(http://checkip.dyndns.org/); using (WebResponse response = request.GetResponse()) using (StreamReader stream = new StreamReader(response.GetResponseStream())) { direction = stream.ReadToEnd(); } //Search for the ip in the html int first = direction.IndexOf(Address: ) + 9; int last = direction.LastIndexOf( ); direction = direction.Substring(first last - first); textBox1.Text= direction; } Thank you so much !!!!!!!! ... Now I can still HOST a website with apatche/iis etc with out a static ip... I will have the program check every 20 seconds if the IP changes I will automate the process to change the IP in all files and run the needed .bat to restart softwares as needed (example change IP in apache file and restart apatche... HAHAHAHAH NO MORE NEED OF STATIC IP TO DO REMOTE WORK ETc THANKS TO YOU !!!! HAHAHAHAH DHCP2 FTW !

thiago costa · Answer

Wow I will try that thanks !!!

How to detect external IP, with simple c# code (kind of like www.whatismyip.com)