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NetworkChange.NetworkAddressChanged Event

Occurs when the IP address of a network interface changes.

Namespace: System.Net.NetworkInformation
Assembly: System (in system.dll)

public static event NetworkAddressChangedEventHandler NetworkAddressChanged
/** @event */
public static void add_NetworkAddressChanged (NetworkAddressChangedEventHandler value)

/** @event */
public static void remove_NetworkAddressChanged (NetworkAddressChangedEventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
Not applicable.

The NetworkChange class raises NetworkAddressChanged events when the address of a network interface, also called a network card or adapter, changes.

To have a NetworkChange object call an event-handling method when a NetworkAddressChanged event occurs, you must associate the method with a NetworkAddressChangedEventHandler delegate, and add this delegate to this event.

The NetworkAddressChanged event is supported on Windows 2000 and later.

The following code example listens for address changes and displays the status of network interfaces when a NetworkAddressChanged event occurs.

using System;
using System.Net;
using System.Net.NetworkInformation;

namespace Examples.Net.AddressChanges
{
    public class NetworkingExample
    {
        public static void Main()
        {
            NetworkChange.NetworkAddressChanged += new 
            NetworkAddressChangedEventHandler(AddressChangedCallback);
            Console.WriteLine("Listening for address changes. Press any key to exit.");
            Console.ReadLine();
        }
        static void AddressChangedCallback(object sender, EventArgs e)
        {
            
            NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
            foreach(NetworkInterface n in adapters)
            {
                Console.WriteLine("   {0} is {1}", n.Name, n.OperationalStatus);
            }
        }
    }
}

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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