IpcChannel Class

 

Provides a channel implementation that uses the IPC protocol to transmit messages.

Namespace:   System.Runtime.Remoting.Channels.Ipc
Assembly:  System.Runtime.Remoting (in System.Runtime.Remoting.dll)

System.Object
  System.Runtime.Remoting.Channels.Ipc.IpcChannel

public class IpcChannel : IChannelReceiver, IChannel, IChannelSender, 
	ISecurableChannel

NameDescription
System_CAPS_pubmethodIpcChannel()

Initializes a new instance of the IpcChannel class, activating only a client channel, and not a server channel.

System_CAPS_pubmethodIpcChannel(IDictionary, IClientChannelSinkProvider, IServerChannelSinkProvider)

Initializes a new instance of the IpcChannel class with the specified configuration properties and sinks.

System_CAPS_pubmethodIpcChannel(IDictionary, IClientChannelSinkProvider, IServerChannelSinkProvider, CommonSecurityDescriptor)

Initializes a new instance of the IpcChannel class with the specified configuration properties and sinks.

System_CAPS_pubmethodIpcChannel(String)

Initializes a new instance of the IpcChannel class with a server channel that listens on the specified IPC port.

NameDescription
System_CAPS_pubpropertyChannelData

Gets the channel-specific data.

System_CAPS_pubpropertyChannelName

Gets the name of the current channel.

System_CAPS_pubpropertyChannelPriority

Gets the priority of the current channel.

System_CAPS_pubpropertyIsSecured

Gets or sets a Boolean value that indicates whether the current channel is secure.

NameDescription
System_CAPS_pubmethodCreateMessageSink(String, Object, String)

Returns a channel message sink that delivers messages to the specified URL or channel data object.

System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodGetUrlsForUri(String)

Returns an array of all the URLs for an object with the specified URI, hosted on the current IpcChannel.

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodParse(String, String)

Extracts the channel URI and the remote well-known object URI from the specified URL.

System_CAPS_pubmethodStartListening(Object)

Instructs the current channel to start listening for requests.

System_CAPS_pubmethodStopListening(Object)

Instructs the current channel to stop listening for requests.

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

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.

System_CAPS_cautionCaution

When setting the exclusiveAddressUse property to false in the properties argument, several IpcServerChannel objects can be registered for the same named pipe. In such a case requests can go to any of the channels registered. This setting is considered secure only if ALCs are also used.

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;
using System.Runtime.Remoting.Channels.Ipc;
using System.Security.Permissions;

public class Server
{
[SecurityPermission(SecurityAction.Demand)]
    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;
using System.Runtime.Remoting.Channels.Ipc;
using System.Security.Permissions;

public class Client
{
[SecurityPermission(SecurityAction.Demand)]
    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 System;

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

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

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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