IPAddressInformation.IsDnsEligible Properti

Definisi

Ruang nama:

System.Net.NetworkInformation

Rakitan:

System.Net.NetworkInformation.dll

Boolean Mendapatkan nilai yang menunjukkan apakah alamat Protokol Internet (IP) valid untuk muncul dalam database server Sistem Nama Domain (DNS).

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

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

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

Public MustOverride ReadOnly Property IsDnsEligible As Boolean

Nilai Properti

Boolean

true jika alamat bisa muncul di database DNS; jika tidak, false.

Atribut

SupportedOSPlatformAttribute

Contoh

Contoh kode berikut menampilkan alamat anycast untuk antarmuka jaringan di komputer lokal.

void DisplayAnycastAddresses()
{
    int count = 0;
            
    Console::WriteLine( "Anycast Addresses" );
    array<NetworkInterface^>^adapters = NetworkInterface::GetAllNetworkInterfaces();
    System::Collections::IEnumerator^ myEnum13 = adapters->GetEnumerator();
    while ( myEnum13->MoveNext() )
    {
        NetworkInterface ^ adapter = safe_cast<NetworkInterface ^>(myEnum13->Current);
        IPInterfaceProperties ^ adapterProperties = adapter->GetIPProperties();
        IPAddressInformationCollection ^ anyCast = adapterProperties->AnycastAddresses;
        if ( anyCast->Count > 0 )
        {
            Console::WriteLine( adapter->Description );
            System::Collections::IEnumerator^ myEnum14 = anyCast->GetEnumerator();
            while ( myEnum14->MoveNext() )
            {
                IPAddressInformation ^ any = safe_cast<IPAddressInformation ^>(myEnum14->Current);
                Console::WriteLine( "  Anycast Address .......................... : {0} {1} {2}", 
                    any->Address, any->IsTransient ? "Transient" : "", 
                    any->IsDnsEligible ? "DNS Eligible" : "" );
                count++;
            } 
            Console::WriteLine();
        }
    }
    if (count == 0)
    {
        Console::WriteLine("  No anycast addresses were found.");
        Console::WriteLine();
    }
}

public static void DisplayAnycastAddresses()
{
    int count = 0;

    Console.WriteLine("Anycast Addresses");
    NetworkInterface[] adapters  = NetworkInterface.GetAllNetworkInterfaces();
    foreach (NetworkInterface adapter in adapters)
    {
        IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
        IPAddressInformationCollection anyCast = adapterProperties.AnycastAddresses;
        if (anyCast.Count >0)
        {

            Console.WriteLine(adapter.Description);
            foreach (IPAddressInformation any in anyCast)
            {
                Console.WriteLine("  Anycast Address .......................... : {0} {1} {2}",
                    any.Address,
                    any.IsTransient ? "Transient" : "",
                    any.IsDnsEligible ? "DNS Eligible" : ""
                );
                count++;
            }
            Console.WriteLine();
        }
    }
    if (count == 0)
    {
        Console.WriteLine("  No anycast addressses were found.");
        Console.WriteLine();
    }
}

Public Shared Sub DisplayAnycastAddresses() 
    Dim count as Integer = 0
    
    Console.WriteLine("Anycast Addresses")
    Dim adapters As NetworkInterface() = NetworkInterface.GetAllNetworkInterfaces()
    Dim adapter As NetworkInterface
    For Each adapter In  adapters
        Dim adapterProperties As IPInterfaceProperties = adapter.GetIPProperties()
        Dim anyCast As IPAddressInformationCollection = adapterProperties.AnycastAddresses
        If anyCast.Count > 0 Then
            Console.WriteLine(adapter.Description)
            Dim any As IPAddressInformation
            For Each any In  anyCast
                Console.WriteLine("  Anycast Address .......................... : {0} {1} {2}", any.Address, IIf(any.IsTransient, "Transient", ""), IIf(any.IsDnsEligible, "DNS Eligible", ""))
            'TODO: For performance reasons this should be changed to nested IF statements
            'TODO: For performance reasons this should be changed to nested IF statements
                count += 1
            Next any
            Console.WriteLine()
        End If
    Next adapter

    if count = 0 then
        Console.WriteLine("  No anycast addresses were found.")
        Console.WriteLine()
    End if
End Sub

Keterangan

Alamat dalam rentang 169.254.0.0 hingga 169.254.255.255 tidak memenuhi syarat DNS. Alamat ini dicadangkan untuk Alamat IP Privat Otomatis (APIPA).