public static string GetSubnet(ListBox AdapterList)
{
if (AdapterList.SelectedItem == null)
{
if (AdapterList.Items.Count == 0)
{
if (!AdapterHandler.GetAdapters(AdapterList))
{
MessageBox.Show("Can't automatically derive subnet as no adapters could be found");
return(null);
}
}
AdapterList.SelectedItem = AdapterList.Items[0];
}
foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
{
foreach (UnicastIPAddressInformation ip in nic.GetIPProperties().UnicastAddresses)
{
if (nic.Name == AdapterList.SelectedItem.ToString())
{
if (ip.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
return(FilterToSubnet(ip.Address.ToString()));
}
}
}
}
return("not found");
}
private void RefreshAdapters_Click(object sender, EventArgs e)
{
AdapterHandler.GetAdapters(AdapterList);
}
private void Form1_Load(object sender, EventArgs e)
{
AdapterHandler.GetAdapters(AdapterList);
}