UdpClient.Receive(IPEndPoint) Méthode

public:
 cli::array <System::Byte> ^ Receive(System::Net::IPEndPoint ^ % remoteEP);

public byte[] Receive (ref System.Net.IPEndPoint? remoteEP);

public byte[] Receive (ref System.Net.IPEndPoint remoteEP);

member this.Receive : IPEndPoint -> byte[]

Public Function Receive (ByRef remoteEP As IPEndPoint) As Byte()

Paramètres

Retours

Tableau de type Byte qui contient les données du datagramme.

Exceptions

Exemples

L’exemple suivant illustre la Receive méthode. La Receive méthode bloque l’exécution jusqu’à ce qu’elle reçoive un message. À l’aide du IPEndPoint passé à Receive, l’identité de l’hôte qui répond est révélée.

//Creates a UdpClient for reading incoming data.
UdpClient^ receivingUdpClient = gcnew UdpClient( 11000 );

//Creates an IPEndPoint to record the IP Address and port number of the sender. 
// The IPEndPoint will allow you to read datagrams sent from any source.
IPEndPoint^ RemoteIpEndPoint = gcnew IPEndPoint( IPAddress::Any,0 );
try
{
   // Blocks until a message returns on this socket from a remote host.
   array<Byte>^receiveBytes = receivingUdpClient->Receive(  RemoteIpEndPoint );

   String^ returnData = Encoding::ASCII->GetString( receiveBytes );

   Console::WriteLine( "This is the message you received {0}", returnData );
   Console::WriteLine( "This message was sent from {0} on their port number {1}",
      RemoteIpEndPoint->Address, RemoteIpEndPoint->Port );
}
catch ( Exception^ e ) 
{
   Console::WriteLine( e->ToString() );
}

 //Creates a UdpClient for reading incoming data.
 UdpClient receivingUdpClient = new UdpClient(11000);

 //Creates an IPEndPoint to record the IP Address and port number of the sender.
// The IPEndPoint will allow you to read datagrams sent from any source.
 IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
 try{

     // Blocks until a message returns on this socket from a remote host.
     Byte[] receiveBytes = receivingUdpClient.Receive(ref RemoteIpEndPoint);

     string returnData = Encoding.ASCII.GetString(receiveBytes);

     Console.WriteLine("This is the message you received " +
                               returnData.ToString());
     Console.WriteLine("This message was sent from " +
                                 RemoteIpEndPoint.Address.ToString() +
                                 " on their port number " +
                                 RemoteIpEndPoint.Port.ToString());
 }
 catch ( Exception e ){
     Console.WriteLine(e.ToString());
 }

   'Creates a UdpClient for reading incoming data.
   Dim receivingUdpClient As New UdpClient(11000)
   
   'Creates an IPEndPoint to record the IP address and port number of the sender. 
   ' The IPEndPoint will allow you to read datagrams sent from any source.
   Dim RemoteIpEndPoint As New IPEndPoint(IPAddress.Any, 0)
   Try
      
      ' Blocks until a message returns on this socket from a remote host.
      Dim receiveBytes As [Byte]() = receivingUdpClient.Receive(RemoteIpEndPoint)
      
      Dim returnData As String = Encoding.ASCII.GetString(receiveBytes)
      
      Console.WriteLine(("This is the message you received " + returnData.ToString()))
      Console.WriteLine(("This message was sent from " + RemoteIpEndPoint.Address.ToString() + " on their port number " + RemoteIpEndPoint.Port.ToString()))
   Catch e As Exception
      Console.WriteLine(e.ToString())
   End Try
End Sub

Remarques

La Receive méthode est bloquée jusqu’à ce qu’un datagramme arrive d’un hôte distant. Lorsque des données sont disponibles, la Receive méthode lit le premier datagramme en file d’attente et retourne la partie de données sous forme de tableau d’octets. Cette méthode remplit le paramètre avec le remoteEPIPAddress numéro de port et de l’expéditeur.

Si vous spécifiez un hôte distant par défaut dans la Connect méthode, la Receive méthode accepte uniquement les datagrammes de cet hôte. Tous les autres datagrammes seront ignorés.

Si vous recevez un SocketException, utilisez SocketException.ErrorCode pour obtenir le code d’erreur spécifique. Une fois ce code obtenu, vous pouvez vous référer à la documentation du code d’erreur de l’API Windows Sockets version 2 pour obtenir une description détaillée de l’erreur.

S’applique à

Voir aussi

• Send(Byte[], Int32, IPEndPoint)
• IPEndPoint
• Connect(String, Int32)
• IPAddress