HttpClientChannel Classe

Definizione

public ref class HttpClientChannel : System::Runtime::Remoting::Channels::BaseChannelWithProperties, System::Runtime::Remoting::Channels::IChannelSender

public ref class HttpClientChannel : System::Runtime::Remoting::Channels::BaseChannelWithProperties, System::Runtime::Remoting::Channels::IChannelSender, System::Runtime::Remoting::Channels::ISecurableChannel

public class HttpClientChannel : System.Runtime.Remoting.Channels.BaseChannelWithProperties, System.Runtime.Remoting.Channels.IChannelSender

public class HttpClientChannel : System.Runtime.Remoting.Channels.BaseChannelWithProperties, System.Runtime.Remoting.Channels.IChannelSender, System.Runtime.Remoting.Channels.ISecurableChannel

type HttpClientChannel = class
    inherit BaseChannelWithProperties
    interface IChannelSender
    interface IChannel

type HttpClientChannel = class
    inherit BaseChannelWithProperties
    interface IChannelSender
    interface IChannel
    interface ISecurableChannel

Public Class HttpClientChannel
Inherits BaseChannelWithProperties
Implements IChannelSender

Public Class HttpClientChannel
Inherits BaseChannelWithProperties
Implements IChannelSender, ISecurableChannel

Ereditarietà

Object

BaseChannelObjectWithProperties

BaseChannelWithProperties

HttpClientChannel

Implementazioni

IChannel IChannelSender ISecurableChannel

Esempio

Nell'esempio di codice seguente viene illustrato come usare un HttpClientChannel oggetto per configurare un server di comunicazione remota e il relativo client. L'esempio contiene tre parti:

• Un server

• Un client

• Oggetto remoto utilizzato dal server e dal client

Nell'esempio di codice seguente viene illustrato un server.

#using <System.dll>
#using <System.Runtime.Remoting.dll>
#using "common.dll"
using namespace System;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Channels;
using namespace System::Runtime::Remoting::Channels::Http;

void main()
{
   // Create the server channel.
   HttpServerChannel^ serverChannel = gcnew HttpServerChannel( 9090 );
   
   // Register the server channel.
   ChannelServices::RegisterChannel( serverChannel );
   
   // Expose an object for remote calls.
   RemotingConfiguration::RegisterWellKnownServiceType( RemoteObject::typeid, L"RemoteObject.rem", WellKnownObjectMode::Singleton );
   
   // Wait for the user prompt.
   Console::WriteLine( L"Press ENTER to exit the server." );
   Console::ReadLine();
   Console::WriteLine( L"The server is exiting." );
}

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Http;

public class Server
{
    public static void Main(string[] args)
    {
        // Create the server channel.
        HttpServerChannel serverChannel = new HttpServerChannel(9090);

        // Register the server channel.
        ChannelServices.RegisterChannel(serverChannel);

        // Expose an object for remote calls.
        RemotingConfiguration.RegisterWellKnownServiceType(
            typeof(RemoteObject), "RemoteObject.rem",
            WellKnownObjectMode.Singleton);

        // Wait for the user prompt.
        Console.WriteLine("Press ENTER to exit the server.");
        Console.ReadLine();
        Console.WriteLine("The server is exiting.");
    }
}

Nell'esempio di codice seguente viene illustrato un client per questo server.

#using <System.dll>
#using <System.Runtime.Remoting.dll>
#using "common.dll"

using namespace System;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Channels;
using namespace System::Runtime::Remoting::Channels::Http;
void main()
{
   // Create the channel.
   HttpClientChannel^ clientChannel = gcnew HttpClientChannel;

   // Register the channel.
   ChannelServices::RegisterChannel( clientChannel );

   // Register as client for remote object.
   WellKnownClientTypeEntry^ remoteType = gcnew WellKnownClientTypeEntry( RemoteObject::typeid,L"http://localhost:9090/RemoteObject.rem" );
   RemotingConfiguration::RegisterWellKnownClientType( remoteType );

   // Create a message sink.
   String^ objectUri;
   System::Runtime::Remoting::Messaging::IMessageSink^ messageSink = clientChannel->CreateMessageSink( L"http://localhost:9090/RemoteObject.rem", nullptr,  objectUri );
   Console::WriteLine( L"The URI of the message sink is {0}.", objectUri );
   if ( messageSink != nullptr )
   {
      Console::WriteLine( L"The type of the message sink is {0}.", messageSink->GetType() );
   }

   // Display the channel's properties using Keys and Item.
   for each(String^ key in clientChannel->Keys)
   {
       Console::WriteLine("clientChannel[{0}] = <{1}>", key, clientChannel[key]);
   }

   // Parse the channel's URI.
   String^ objectUrl = L"http://localhost:9090/RemoteObject.rem";
   String^ channelUri = clientChannel->Parse( objectUrl,  objectUri );
   Console::WriteLine( L"The object URL is {0}.", objectUrl );
   Console::WriteLine( L"The object URI is {0}.", objectUri );
   Console::WriteLine( L"The channel URI is {0}.", channelUri );

   // Create an instance of the remote object.
   RemoteObject^ service = gcnew RemoteObject;
   
   // Invoke a method on the remote object.
   Console::WriteLine( L"The client is invoking the remote object." );
   Console::WriteLine( L"The remote object has been called {0} times.", service->GetCount() );
}

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Http;

public class Client
{
    public static void Main(string[] args)
    {
        // Create the channel.
        HttpClientChannel clientChannel = new HttpClientChannel();

        // Register the channel.
        ChannelServices.RegisterChannel(clientChannel);

        // Register as client for remote object.
        WellKnownClientTypeEntry remoteType =
            new WellKnownClientTypeEntry(typeof(RemoteObject),
            "http://localhost:9090/RemoteObject.rem");
        RemotingConfiguration.RegisterWellKnownClientType(remoteType);

        // Create a message sink.
        string objectUri;
        System.Runtime.Remoting.Messaging.IMessageSink messageSink =
            clientChannel.CreateMessageSink(
            "http://localhost:9090/RemoteObject.rem",
            null, out objectUri);
        Console.WriteLine(
            "The URI of the message sink is {0}.",
            objectUri);
        if (messageSink != null)
        {
            Console.WriteLine("The type of the message sink is {0}.",
                messageSink.GetType().ToString());
        }

        // Display the channel's properties using Keys and Item.
        foreach(string key in clientChannel.Keys)
        {
            Console.WriteLine(
                "clientChannel[{0}] = <{1}>",
                key, clientChannel[key]);
        }

        // Parse the channel's URI.
        string objectUrl = "http://localhost:9090/RemoteObject.rem";
        string channelUri = clientChannel.Parse(objectUrl, out objectUri);
        Console.WriteLine("The object URL is {0}.", objectUrl);
        Console.WriteLine("The object URI is {0}.", objectUri);
        Console.WriteLine("The channel URI is {0}.", channelUri);

        // Create an instance of the remote object.
        RemoteObject service = new RemoteObject();

        // Invoke a method on the remote object.
        Console.WriteLine("The client is invoking the remote object.");
        Console.WriteLine("The remote object has been called {0} times.",
            service.GetCount());
    }
}

Nell'esempio di codice seguente viene illustrato l'oggetto remoto usato dal server e dal client.

#using <System.dll>
using namespace System;
using namespace System::Runtime::Remoting;

// Remote object.
public ref class RemoteObject: public MarshalByRefObject
{
private:
   static int callCount = 0;

public:
   int GetCount()
   {
      Console::WriteLine( L"GetCount was called." );
      callCount++;
      return (callCount);
   }

};

using System;
using System.Runtime.Remoting;

// Remote object.
public class RemoteObject : MarshalByRefObject
{
    private int callCount = 0;

    public int GetCount()
    {
        Console.WriteLine("GetCount was called.");
        callCount++;
        return(callCount);
    }
}

Commenti

I canali trasportano i messaggi attraverso i limiti remoti (ad esempio, tra computer o domini applicazione). La HttpClientChannel classe trasporta i messaggi usando il protocollo HTTP.

I canali vengono usati dall'infrastruttura remota di .NET Framework per il trasporto di chiamate remote. Quando un client effettua una chiamata a un oggetto remoto, la chiamata viene serializzata in un messaggio inviato da un canale client e ricevuto da un canale server. Viene quindi deserializzato ed elaborato. Tutti i valori restituiti vengono trasmessi dal canale del server e ricevuti dal canale client.

Per eseguire un'ulteriore elaborazione dei messaggi sul lato client, è possibile specificare un'implementazione di IClientChannelSinkProvider tramite la quale vengono passati tutti i messaggi elaborati da HttpClientChannel .

Per impostazione predefinita, HttpServerChannel usa un formattatore SOAP per serializzare tutti i messaggi.

Un HttpClientChannel oggetto ha associato proprietà di configurazione che possono essere impostate in fase di esecuzione in un file di configurazione (richiamando il metodo statico RemotingConfiguration.Configure ) o a livello di codice (passando una IDictionary raccolta al HttpClientChannel costruttore). Per un elenco di queste proprietà di configurazione, vedere Proprietà di configurazione canale e formattatore.

Costruttori

Campi

Proprietà

Metodi

Implementazioni dell'interfaccia esplicita

Metodi di estensione

Si applica a