Question

I would like to detect when a device is connected to an ethernet port of the machine that my application is running on. I know how to do this with a USB port but the problem is, the Port isn’t USB!

If it was a USB device I would simply override WndProc and catch the message, if it is WM_DEVICECHANGE, then i’m on to a winner, I was wondering if it was as simple as this with any device that may be plugged into the port?

I don’t want to know if there is anything happening, or if the device is working, just simply to find if there has been an insertion or removal.

Answer 1

I never used it myself, but I think that the NetworkChange.NetworkAvailabilityChanged event might fit your needs.

Update

A brief investigation indicates that NetworkChange.NetworkAddressChanged might work better:

public static void Main()
{

    NetworkChange.NetworkAddressChanged += (s, e) =>
    {
        NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
        foreach (var item in nics)
        {
            Console.WriteLine("Network Interface: {0}, Status: {1}", item.Name, item.OperationalStatus.ToString());
        }
    };

    string input = string.Empty;
    while (input != "quit")
    {
        input = Console.ReadLine();
    }
}