IPAddressInformation.IsDnsEligible Egenskap

Definition

Namnområde:
System.Net.NetworkInformation
Sammansättning:
System.dll
Sammansättning:
netstandard.dll

Hämtar ett Boolean värde som anger om IP-adressen (Internet Protocol) är giltig för att visas i en DNS-serverdatabas (Domain Name System).

public:
 abstract property bool IsDnsEligible { bool get(); };
public abstract bool IsDnsEligible { get; }
member this.IsDnsEligible : bool
Public MustOverride ReadOnly Property IsDnsEligible As Boolean

Egenskapsvärde

Boolean

trueom adressen kan visas i en DNS-databas; annars . false

Exempel

I följande kodexempel visas anycast-adresserna för nätverksgränssnitten på den lokala datorn.

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

Kommentarer

Adresser i intervallet 169.254.0.0 till 169.254.255.255 är inte DNS-berättigade. Dessa adresser är reserverade för automatisk privat IP-adressering (APIPA).

Gäller för