How Do I...Create a Client of a Remote Server?

If you haven't already read the section How Do I Create a Remote Server?, please read this first. The client references the server assembly for metadata, so you have to compile the server before the client. The code for the client is listed below.

using System; using System.Runtime.Remoting; using System.Runtime.Remoting.Channels; using System.Runtime.Remoting.Channels.Tcp; namespace Microsoft.Samples.Remoting.RemotingSamples { public class Client { public static int Main(string [] args) { HelloServer obj = (HelloServer)Activator.GetObject( typeof(RemotingSamples.HelloServer), "tcp://localhost:8085/SayHello"); if (obj == null) System.Console.WriteLine("Could not locate server"); else Console.WriteLine(obj.HelloMethod("Caveman")); return 0; } } } Imports System Imports System.Runtime.Remoting Imports System.Runtime.Remoting.Channels Imports System.Runtime.Remoting.Channels.TCP Namespace Microsoft.Samples.Remoting.RemotingSamples Public Class Client Shared Sub Main Dim obj As HelloServer Obj = CType(Activator.GetObject( _ Type.GetType("RemotingSamples.HelloServer, object"), _ "tcp://localhost:8085/SayHello"), _ HelloServer) If obj Is Nothing Then System.Console.WriteLine("Could not locate server") Else Console.WriteLine(obj.HelloMethod("Caveman")) End If End Sub End Class End Namespace using namespace System; using namespace System::Runtime::Remoting; using namespace System::Runtime::Remoting::Channels; using namespace System::Runtime::Remoting::Channels::Tcp; using namespace RemotingSamples; void main() { HelloServer* obj = __try_cast(Activator::GetObject(__typeof(RemotingSamples::HelloServer), S"tcp://localhost:8085/SayHello")); if (obj) Console::WriteLine(obj->HelloMethod(S"Caveman")); else Console::WriteLine(S"Could not locate server"); }

When the client starts up, it registers a TCP channel and proceeds to activate the object by calling the GetObject method on the Activator class. One point to be noted is that, for the client to activate the object the dll should be copied from the Server machine to the client machine. The parameters for this call are as follows:

1. The type of the name of the class you need to activate, RemotingSamples.HelloServer.

2. Specify the URI of the object you need to activate. For this client the URI is tcp://localhost:8085/SayHello. Note that the URI includes the protocol, machine name, port number, and the endpoint. If the server is deployed on a host named Sunshine, clients can connect to the server by specifying tcp://sunshine:8085/SayHello.

NOTE: All TCP channels use binary serialization when transporting local objects to and from a remote object.