How to get IP of computer on lan if you have the computers name, using c#

Question

I'm currently writing a C# program to connect one computer to another on lan. I have the computer name of the receiving computer but the ip is dynamic so it will change from time to time.

How would I get the lan IP adress of the receiving computer? (the one that goes like 192.168.1.# )

duplicate.http://stackoverflow.com/questions/11931582/get-ip-address-from-hostname-in-lan — Bojan Komazec, Jul 05 '13 at 10:55
I apologize, I tried searching but didn't know it was called hostname — Logan, Jul 05 '13 at 11:07

score 2 · Accepted Answer · answered Jul 05 '13 at 10:44

2

Assuming based on your assumption you are looking for the first IPv4 ip address you can use the following:

String name = "Name";
IPHostEntry ipHostInfo = Dns.GetHostEntry(name);            
// OR you can get the name of the current computer using 
// IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());                

// Get the first IPv4 address
IPAddress ip = ipHostInfo.AddressList.Where(n => n.AddressFamily == AddressFamily.InterNetwork).First();

answered Jul 05 '13 at 10:44

Jake1164

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I can't seem to get the ".Where" part working it isn't recognized. – Logan Jul 05 '13 at 11:05
4.5 is it part of as specific namespace? – Logan Jul 05 '13 at 11:08
This was 4.0 but should work in 3.5 as well. The Where is linq so you need a reference to using System.Linq; – Jake1164 Jul 05 '13 at 11:08

score 1 · Answer 2 · answered Jul 05 '13 at 10:44

1

Dns.GetHostAddresses Method

you can resolve Host name to IP as follows

string hostName = "www.Google.com";
IPAddress[] addresslist = Dns.GetHostAddresses(hostName);

foreach (IPAddress address in addresslist)
{
   string ip = address.ToString();
}

answered Jul 05 '13 at 10:44

Kurubaran

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5
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How to get IP of computer on lan if you have the computers name, using c#

2 Answers2