NetworkChange.NetworkAddressChanged 事件
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
當網路介面的 IP 位址變更時發生。
public:
static event System::Net::NetworkInformation::NetworkAddressChangedEventHandler ^ NetworkAddressChanged;public static event System.Net.NetworkInformation.NetworkAddressChangedEventHandler NetworkAddressChanged;public static event System.Net.NetworkInformation.NetworkAddressChangedEventHandler? NetworkAddressChanged;[System.Runtime.Versioning.UnsupportedOSPlatform("illumos")]
[System.Runtime.Versioning.UnsupportedOSPlatform("solaris")]
public static event System.Net.NetworkInformation.NetworkAddressChangedEventHandler? NetworkAddressChanged;member this.NetworkAddressChanged : System.Net.NetworkInformation.NetworkAddressChangedEventHandler [<System.Runtime.Versioning.UnsupportedOSPlatform("illumos")>]
[<System.Runtime.Versioning.UnsupportedOSPlatform("solaris")>]
member this.NetworkAddressChanged : System.Net.NetworkInformation.NetworkAddressChangedEventHandler Public Shared Custom Event NetworkAddressChanged As NetworkAddressChangedEventHandler - 屬性
下列程式代碼範例會接聽位址變更，並在事件發生時 NetworkAddressChanged 顯示網路介面的狀態。
#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 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);
}
}
}
}
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
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
類別 NetworkChange 會在 NetworkAddressChanged 網路介面的位址變更時引發事件，也稱為網路適配器或適配卡。
若要讓 NetworkChange 物件在事件發生時 NetworkAddressChanged 呼叫事件處理方法，您必須將 方法與 NetworkAddressChangedEventHandler 委派產生關聯，並將這個委派新增至這個事件。
| 產品 | 版本 |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
| UWP | 10.0 |
