IpcChannel Class

Definition

public ref class IpcChannel : System::Runtime::Remoting::Channels::IChannelReceiver, System::Runtime::Remoting::Channels::IChannelSender, System::Runtime::Remoting::Channels::ISecurableChannel

public class IpcChannel : System.Runtime.Remoting.Channels.IChannelReceiver, System.Runtime.Remoting.Channels.IChannelSender, System.Runtime.Remoting.Channels.ISecurableChannel

type IpcChannel = class
    interface IChannelReceiver
    interface IChannelSender
    interface IChannel
    interface ISecurableChannel

type IpcChannel = class
    interface IChannelReceiver
    interface IChannel
    interface IChannelSender
    interface ISecurableChannel

Public Class IpcChannel
Implements IChannelReceiver, IChannelSender, ISecurableChannel

Inheritance

Object

IpcChannel

Implements

IChannel IChannelReceiver IChannelSender ISecurableChannel

Examples

The following code example shows how to use a IpcChannel to set up a remoting server and its client. The example contains three parts:

• A server

• A client

• A remote object used by the server and the client.

The following code example shows a server.

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

void main()
{
   // Create the server channel.
   IpcChannel^ serverChannel = gcnew IpcChannel( L"localhost:9090" );

   // Register the server channel.
   System::Runtime::Remoting::Channels::ChannelServices::RegisterChannel( serverChannel );

   // Show the name of the channel.
   Console::WriteLine( L"The name of the channel is {0}.", serverChannel->ChannelName );

   // Show the priority of the channel.
   Console::WriteLine( L"The priority of the channel is {0}.", serverChannel->ChannelPriority );

   // Show the URIs associated with the channel.
   System::Runtime::Remoting::Channels::ChannelDataStore^ channelData = (System::Runtime::Remoting::Channels::ChannelDataStore^)serverChannel->ChannelData;
   for each (String^ uri in channelData->ChannelUris)
   {
      Console::WriteLine("The channel URI is {0}.", uri);
   }
   
   // Expose an object for remote calls.
   System::Runtime::Remoting::RemotingConfiguration::RegisterWellKnownServiceType(
         RemoteObject::typeid,L"RemoteObject.rem",
         System::Runtime::Remoting::WellKnownObjectMode::Singleton);
   
   // Parse the channel's URI.
   array<String^>^ urls = serverChannel->GetUrlsForUri( L"RemoteObject.rem" );
   if ( urls->Length > 0 )
   {
      String^ objectUrl = urls[ 0 ];
      String^ objectUri;
      String^ channelUri = serverChannel->Parse( objectUrl,  objectUri );
      Console::WriteLine( L"The object URI is {0}.", objectUri );
      Console::WriteLine( L"The channel URI is {0}.", channelUri );
      Console::WriteLine( L"The object URL is {0}.", objectUrl );
   }

   // 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.Channels.Ipc;

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

        // Register the server channel.
        System.Runtime.Remoting.Channels.ChannelServices.RegisterChannel(
            serverChannel);

        // Show the name of the channel.
        Console.WriteLine("The name of the channel is {0}.",
            serverChannel.ChannelName);

        // Show the priority of the channel.
        Console.WriteLine("The priority of the channel is {0}.",
            serverChannel.ChannelPriority);

        // Show the URIs associated with the channel.
        System.Runtime.Remoting.Channels.ChannelDataStore channelData =
            (System.Runtime.Remoting.Channels.ChannelDataStore)
            serverChannel.ChannelData;
        foreach (string uri in channelData.ChannelUris)
        {
            Console.WriteLine("The channel URI is {0}.", uri);
        }

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

        // Parse the channel's URI.
        string[] urls = serverChannel.GetUrlsForUri("RemoteObject.rem");
        if (urls.Length > 0)
        {
            string objectUrl = urls[0];
            string objectUri;
            string channelUri = serverChannel.Parse(objectUrl, out objectUri);
            Console.WriteLine("The object URI is {0}.", objectUri);
            Console.WriteLine("The channel URI is {0}.", channelUri);
            Console.WriteLine("The object URL is {0}.", objectUrl);
        }

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

The following code example shows a client for this server.

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

void main()
{
   
   // Create the channel.
   IpcChannel^ channel = gcnew IpcChannel;
   
   // Register the channel.
   System::Runtime::Remoting::Channels::ChannelServices::RegisterChannel(channel);
   
   // Register as client for remote object.
   System::Runtime::Remoting::WellKnownClientTypeEntry^ remoteType = gcnew
       System::Runtime::Remoting::WellKnownClientTypeEntry( 
         RemoteObject::typeid,L"ipc://localhost:9090/RemoteObject.rem" );
   System::Runtime::Remoting::RemotingConfiguration::RegisterWellKnownClientType(remoteType);
   
   // Create a message sink.
   String^ objectUri;
   System::Runtime::Remoting::Messaging::IMessageSink^ messageSink = channel->CreateMessageSink(
      L"ipc://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() );
   }

   
   // 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.Channels.Ipc;

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

        // Register the channel.
        System.Runtime.Remoting.Channels.ChannelServices.
            RegisterChannel(channel);

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

        // Create a message sink.
        string objectUri;
        System.Runtime.Remoting.Messaging.IMessageSink messageSink =
            channel.CreateMessageSink(
                "ipc://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());
        }

        // 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());
    }
}

The following code example shows the remote object used by the server and the client.

using namespace System;

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

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

};

using System;

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

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

Remarks

Channels are used by the.NET Framework remoting infrastructure to transport remote calls. When a client calls a remote object, the call is serialized into a message that is sent by a client channel and received by a server channel. After the message is received, it is deserialized and processed. Any returned values are transmitted by the server channel and received by the client channel.

The IpcChannel class is a convenience class combining the functionality of the IpcClientChannel class and the IpcServerChannel class.

Constructors

Properties

Methods

Applies to