Occurs when the IP address of a network interface changes.
(in System.dll)
Visual Basic (Declaration)
Public Shared Event NetworkAddressChanged As NetworkAddressChangedEventHandler
Dim handler As NetworkAddressChangedEventHandler
AddHandler NetworkChange.NetworkAddressChanged, handler
public static event NetworkAddressChangedEventHandler NetworkAddressChanged
public:
static event NetworkAddressChangedEventHandler^ NetworkAddressChanged {
void add (NetworkAddressChangedEventHandler^ value);
void remove (NetworkAddressChangedEventHandler^ value);
}
JScript does not support events.
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.
Imports System
Imports System.Net
Imports System.Net.NetworkInformation
Public Class NetworkingExample
Public Shared Sub Main()
AddHandler NetworkChange.NetworkAddressChanged, AddressOf AddressChangedCallback
Console.WriteLine("Listening for address changes. Press any key to exit.")
Console.ReadLine()
End Sub 'Main
Private Shared Sub AddressChangedCallback(ByVal sender As Object, ByVal e As EventArgs)
Dim adapters As NetworkInterface() = NetworkInterface.GetAllNetworkInterfaces()
Dim n As NetworkInterface
For Each n In adapters
Console.WriteLine(" {0} is {1}", n.Name, n.OperationalStatus)
Next n
End Sub
End Class
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);
}
}
}
}
#using <System.dll>
using namespace System;
using namespace System::Net;
using namespace System::Net::NetworkInformation;
void AddressChangedCallback( Object^ /*sender*/, EventArgs^ /*e*/ )
{
array<NetworkInterface^>^adapters = NetworkInterface::GetAllNetworkInterfaces();
System::Collections::IEnumerator^ myEnum = adapters->GetEnumerator();
while ( myEnum->MoveNext() )
{
NetworkInterface^ n = safe_cast<NetworkInterface^>(myEnum->Current);
Console::WriteLine( " {0} is {1}", n->Name, n->OperationalStatus );
}
}
int main()
{
NetworkChange::NetworkAddressChanged += gcnew NetworkAddressChangedEventHandler( AddressChangedCallback );
Console::WriteLine( "Listening for address changes. Press any key to exit." );
Console::ReadLine();
}
#using <mscorlib.dll>
#using <System.dll>
using namespace System;
using namespace System::Net;
using namespace System::Net::NetworkInformation;
void AddressChangedCallback(Object* /*sender*/, EventArgs* /*e*/)
{
NetworkInterface* adapters[] = NetworkInterface::GetAllNetworkInterfaces();
System::Collections::IEnumerator* myEnum = adapters->GetEnumerator();
while (myEnum->MoveNext())
{
NetworkInterface* n = __try_cast<NetworkInterface*>(myEnum->Current);
Console::WriteLine(S" {0} is {1}", n->Name, __box(n->OperationalStatus));
}
}
int main()
{
NetworkChange::NetworkAddressChanged += new
NetworkAddressChangedEventHandler(AddressChangedCallback);
Console::WriteLine(S"Listening for address changes. Press any key to exit.");
Console::ReadLine();
}
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0
Reference