IPInterfaceProperties.MulticastAddresses Proprietà

Definizione

Spazio dei nomi:

System.Net.NetworkInformation

Assembly:

System.Net.NetworkInformation.dll

Ottiene gli indirizzi multicast assegnati a questa interfaccia.

public:
 abstract property System::Net::NetworkInformation::MulticastIPAddressInformationCollection ^ MulticastAddresses { System::Net::NetworkInformation::MulticastIPAddressInformationCollection ^ get(); };

public abstract System.Net.NetworkInformation.MulticastIPAddressInformationCollection MulticastAddresses { get; }

member this.MulticastAddresses : System.Net.NetworkInformation.MulticastIPAddressInformationCollection

Public MustOverride ReadOnly Property MulticastAddresses As MulticastIPAddressInformationCollection

Valore della proprietà

MulticastIPAddressInformationCollection

MulticastIPAddressInformationCollection che contiene gli indirizzi multicast per questa interfaccia.

Esempio

Nell'esempio di codice seguente vengono visualizzati gli indirizzi multicast per le interfacce di rete nel computer locale.

void DisplayMulticastAddresses()
{
   int count = 0;
   
   Console::WriteLine( "Multicast Addresses" );
   array<NetworkInterface^>^adapters = NetworkInterface::GetAllNetworkInterfaces();
   System::Collections::IEnumerator^ myEnum15 = adapters->GetEnumerator();
   while ( myEnum15->MoveNext() )
   {
      NetworkInterface ^ adapter = safe_cast<NetworkInterface ^>(myEnum15->Current);
      IPInterfaceProperties ^ adapterProperties = adapter->GetIPProperties();
      MulticastIPAddressInformationCollection ^ multiCast = adapterProperties->MulticastAddresses;
      if ( multiCast->Count > 0 )
      {
         Console::WriteLine( adapter->Description );
         System::Collections::IEnumerator^ myEnum16 = multiCast->GetEnumerator();
         while ( myEnum16->MoveNext() )
         {
            MulticastIPAddressInformation ^ multi = safe_cast<MulticastIPAddressInformation ^>(myEnum16->Current);
            Console::WriteLine( "  Multicast Address ....................... : {0} {1} {2}", 
               multi->Address, multi->IsTransient ? "Transient" : "", 
               multi->IsDnsEligible ? "DNS Eligible" : "" );
            count++;   
         }
         Console::WriteLine();
      }
   }
    if (count == 0)
    {
        Console::WriteLine("  No multicast addresses were found.");
        Console::WriteLine();
    }
}

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

    Console.WriteLine("Multicast Addresses");
    NetworkInterface[] adapters  = NetworkInterface.GetAllNetworkInterfaces();
    foreach (NetworkInterface adapter in adapters)
    {
        IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
        MulticastIPAddressInformationCollection multiCast = adapterProperties.MulticastAddresses;
        if (multiCast.Count > 0)
        {
            Console.WriteLine(adapter.Description);
            foreach (IPAddressInformation multi in multiCast)
            {
                Console.WriteLine("  Multicast Address ....................... : {0} {1} {2}",
                    multi.Address,
                    multi.IsTransient ? "Transient" : "",
                    multi.IsDnsEligible ? "DNS Eligible" : ""
                );
                count++;
            }
            Console.WriteLine();
        }
    }
    if (count == 0)
    {
        Console.WriteLine("  No multicast addressses were found.");
        Console.WriteLine();
    }
}

Public Shared Sub DisplayMulticastAddresses() 
    Dim count as Integer = 0
    
    Console.WriteLine("Multicast Addresses")
    Dim adapters As NetworkInterface() = NetworkInterface.GetAllNetworkInterfaces()
    Dim adapter As NetworkInterface
    For Each adapter In  adapters
        Dim adapterProperties As IPInterfaceProperties = adapter.GetIPProperties()
        Dim multiCast As MulticastIPAddressInformationCollection = adapterProperties.MulticastAddresses
        If multiCast.Count > 0 Then
            Console.WriteLine(adapter.Description)
            Dim multi As IPAddressInformation
            For Each multi In  multiCast
                Console.WriteLine("  Multicast Address ....................... : {0} {1} {2}", multi.Address, IIf(multi.IsTransient, "Transient", ""), IIf(multi.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 multi
            Console.WriteLine()
        End If
    Next adapter

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

End Sub

Commenti

Un indirizzo multicast identifica più computer. I pacchetti inviati a un indirizzo multicast vengono inviati a tutti i computer identificati dall'indirizzo.