How do I get only Internet Protocol version 4 addresses from Dns.GetHostAddresses()? I have the code below, and it gives me IPv4 and IPv6 addresses.
I have to make it work with boxes that have multiple IPv4 addresses.
IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
private void get_IPs()
{
foreach (IPAddress a in localIPs)
{
server_ip = server_ip + a.ToString() + "/";
}
}
Very Clean and sweet when using Linq
IPAddress[] addresses = Dns.GetHostAddresses(Dns.GetHostName()).Where(a => a.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork).ToArray();
This is my code. And can find it on many LAN cards.
private string GetLocalIpAddress()
{
string localIpAddress = string.Empty;
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface nic in nics)
{
if (nic.OperationalStatus != OperationalStatus.Up)
{
continue;
}
IPv4InterfaceStatistics adapterStat = (nic).GetIPv4Statistics();
UnicastIPAddressInformationCollection uniCast = (nic).GetIPProperties().UnicastAddresses;
if (uniCast != null)
{
foreach (UnicastIPAddressInformation uni in uniCast)
{
if (adapterStat.UnicastPacketsReceived > 0
&& adapterStat.UnicastPacketsSent > 0
&& nic.NetworkInterfaceType != NetworkInterfaceType.Loopback)
{
if (uni.Address.AddressFamily == AddressFamily.InterNetwork)
{
localIpAddress = nic.GetIPProperties().UnicastAddresses[0].Address.ToString();
break;
}
}
}
}
}
return localIpAddress;
}
Here is a code to find the first connected IPv4 by using for loop :
IPAddress ipAddress = null;
IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
for (int i=0 ; i<localIPs.Length ; i++)
{
if (localIPs[i].AddressFamily == AddressFamily.InterNetwork)
{
ipAddress = localIPs[i];
break;
}
}