IPv4InterfaceProperties.IsAutomaticPrivateAddressingActive Properti

Definisi

Ruang nama:

System.Net.NetworkInformation

Rakitan:

System.Net.NetworkInformation.dll

Boolean Mendapatkan nilai yang menunjukkan apakah antarmuka ini memiliki alamat ALAMAT IP privat otomatis (APIPA).

public:
 abstract property bool IsAutomaticPrivateAddressingActive { bool get(); };

[System.Runtime.Versioning.SupportedOSPlatform("windows")]
public abstract bool IsAutomaticPrivateAddressingActive { get; }

[<System.Runtime.Versioning.SupportedOSPlatform("windows")>]
member this.IsAutomaticPrivateAddressingActive : bool

Public MustOverride ReadOnly Property IsAutomaticPrivateAddressingActive As Boolean

Nilai Properti

Boolean

true jika antarmuka menggunakan alamat APIPA; jika tidak, false.

Atribut

SupportedOSPlatformAttribute

Contoh

Contoh kode berikut mendapatkan IPv4InterfaceProperties objek dan menampilkan datanya.

void DisplayIPv4NetworkInterfaces()
{
   array<NetworkInterface^>^nics = NetworkInterface::GetAllNetworkInterfaces();
   IPGlobalProperties ^ properties = IPGlobalProperties::GetIPGlobalProperties();
   Console::WriteLine( "IPv4 interface information for {0}.{1}", properties->HostName, properties->DomainName );
   System::Collections::IEnumerator^ myEnum23 = nics->GetEnumerator();
   while ( myEnum23->MoveNext() )
   {
      NetworkInterface ^ adapter = safe_cast<NetworkInterface ^>(myEnum23->Current);

      // Only display informatin for interfaces that support IPv4.
      if ( adapter->Supports( NetworkInterfaceComponent::IPv4 ) == false )
      {
         continue;
      }
      Console::WriteLine();
      Console::WriteLine( adapter->Description );

      // Underline the description.
      Console::WriteLine( String::Empty->PadLeft( adapter->Description->Length, '=' ) );
      IPInterfaceProperties ^ adapterProperties = adapter->GetIPProperties();

      // Try to get the IPv4 interface properties.
      IPv4InterfaceProperties ^ p = adapterProperties->GetIPv4Properties();
      if ( !p )
      {
         Console::WriteLine( "No IPv4 information is available for this interface." );
         continue;
      }

      // Display the IPv4 specific data.
      Console::WriteLine( "  Index ............................. : {0}", 
         p->Index );
      Console::WriteLine( "  MTU ............................... : {0}", 
         p->Mtu );
      Console::WriteLine( "  APIPA active....................... : {0}", 
         p->IsAutomaticPrivateAddressingActive );
      Console::WriteLine( "  APIPA enabled...................... : {0}", 
         p->IsAutomaticPrivateAddressingEnabled );
      Console::WriteLine( "  Forwarding enabled................. : {0}", 
         p->IsForwardingEnabled );
      Console::WriteLine( "  Uses WINS ......................... : {0}", 
         p->UsesWins );
   }
}

public static void DisplayIPv4NetworkInterfaces()
{
    NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
    IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
    Console.WriteLine("IPv4 interface information for {0}.{1}",
       properties.HostName, properties.DomainName);
    Console.WriteLine();

    foreach (NetworkInterface adapter in nics)
    {
        // Only display informatin for interfaces that support IPv4.
        if (adapter.Supports(NetworkInterfaceComponent.IPv4) == false)
        {
            continue;
        }
        Console.WriteLine(adapter.Description);
        // Underline the description.
        Console.WriteLine(String.Empty.PadLeft(adapter.Description.Length,'='));
        IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
        // Try to get the IPv4 interface properties.
        IPv4InterfaceProperties p = adapterProperties.GetIPv4Properties();

        if (p == null)
        {
            Console.WriteLine("No IPv4 information is available for this interface.");
            Console.WriteLine();
            continue;
        }
        // Display the IPv4 specific data.
        Console.WriteLine("  Index ............................. : {0}", p.Index);
        Console.WriteLine("  MTU ............................... : {0}", p.Mtu);
        Console.WriteLine("  APIPA active....................... : {0}",
            p.IsAutomaticPrivateAddressingActive);
        Console.WriteLine("  APIPA enabled...................... : {0}",
            p.IsAutomaticPrivateAddressingEnabled);
        Console.WriteLine("  Forwarding enabled................. : {0}",
            p.IsForwardingEnabled);
        Console.WriteLine("  Uses WINS ......................... : {0}",
            p.UsesWins);
        Console.WriteLine();
    }
}

Public Shared Sub DisplayIPv4NetworkInterfaces() 
    Dim nics As NetworkInterface() = NetworkInterface.GetAllNetworkInterfaces()
    Dim properties As IPGlobalProperties = IPGlobalProperties.GetIPGlobalProperties()
    Console.WriteLine("IPv4 interface information for {0}.{1}", properties.HostName, properties.DomainName)
    
    Dim adapter As NetworkInterface
    For Each adapter In  nics
        ' Only display informatin for interfaces that support IPv4.
        If adapter.Supports(NetworkInterfaceComponent.IPv4) = False Then
            GoTo ContinueForEach1
        End If
        Console.WriteLine()
        Console.WriteLine(adapter.Description)
        ' Underline the description.
        Console.WriteLine(String.Empty.PadLeft(adapter.Description.Length, "="c))
        Dim adapterProperties As IPInterfaceProperties = adapter.GetIPProperties()
        ' Try to get the IPv4 interface properties.
        Dim p As IPv4InterfaceProperties = adapterProperties.GetIPv4Properties()
        
        If p Is Nothing Then
            Console.WriteLine("No IPv4 information is available for this interface.")
            GoTo ContinueForEach1
        End If
        ' Display the IPv4 specific data.
        Console.WriteLine("  Index ............................. : {0}", p.Index)
        Console.WriteLine("  MTU ............................... : {0}", p.Mtu)
        Console.WriteLine("  APIPA active....................... : {0}", p.IsAutomaticPrivateAddressingActive)
        Console.WriteLine("  APIPA enabled...................... : {0}", p.IsAutomaticPrivateAddressingEnabled)
        Console.WriteLine("  Forwarding enabled................. : {0}", p.IsForwardingEnabled)
        Console.WriteLine("  Uses WINS ......................... : {0}", p.UsesWins)
    ContinueForEach1:
    Next adapter

End Sub

Keterangan

Alamat IP privat otomatis memungkinkan komputer yang tidak memiliki akses ke server Dynamic Host Configuration Protocol (DHCP) secara otomatis diberi alamat IP yang tidak bertentangan dengan alamat publik. Alamat ini berada dalam rentang 169.254.0.0 hingga 169.254.255.255.