Found a solution from a similar posting in google usergroup. An extra QI for ISession solves the problem. But not sure why.
Thanks, Sundar Krishnamoorthy KLA-Tencor Corp (408) 875 7278 -----Original Message----- From: Krishnamoorthy, Meenakshisundaram [mailto:[EMAIL PROTECTED] Sent: Thursday, March 06, 2003 10:40 AM To: [EMAIL PROTECTED] Subject: [ADVANCED-DOTNET] creating an instance of the remote manged class from an unmanage d client Hi all, I guess one of you could help me out here with .NET Remoting. The situation is below. I have the following classes defined. Public interface ISession { void Run(); void Stop(); //.. other methods }; Public abstract class SessionBase : MarshalByRefObject, ISession { public SessionBase(parameters) {} // no default constructors for this class }; in an assembly Session.dll public class MySession : SessionBase { public MySession() {} // default constructor available for this class. Hence it is comvisible } Now i've a session host console application to host remote instances of MySession as follows Class SessionHost { main() { HttpChannel chnl = new HttpChannel(1234); ChannelServices.RegisterChannel(chnl); RemotingConfiguration.RegisterWellKnownServiceType(typeof(MySession), "MySession.soap", WellKnownObjectMode.Singleton); } } UnManaged Client Side Code Remember an unmanaged client can't create instance of this class going through Activator.GetObject, as the Activator is not COM creatable. Hence I created a managed class named SessionADapter as follows. Public interface ISessionAdapter { void Init(); ISession GetMySession(); } [ComVisible(true)] Public class SessionAdapter : ISessionAdpater { public void Init() { HttpChannel chnl = new HttpChannel(); ChannelServices.RegisterChannel(chnl); } public ISession GetSession(ISessionListener sessionListener) { ISession iSession = (ISession)Activator.GetObject(typeof(ISession), "http://localhost:1234/MySession.soap";); Return iSession; } } Hence my unmanaged client creates an local instance of the adapter (i.e CCW) and gets the ISessionAdapter pointer. It is also successful in calling GetSession() and getting a non null interface pointer to ISession. The traces on the sessionhost console app verifies that a remote instance is being created for a request from this unmanaged client app. The problem is when I try to call methods on the ISession interface from the unmanaged client. I get the following error that reads "Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.". Am I doing something wrong here? Please help. Thanks, Sundar Krishnamoorthy KLA-Tencor Corp (408) 875 7278 =================================== This list is hosted by DevelopMentor(r) http://www.develop.com You may be interested in Guerrilla .NET, 24 March 2003, in London http://www.develop.com/courses/gdotnet View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor� http://www.develop.com You may be interested in Guerrilla .NET, 24 March 2003, in London http://www.develop.com/courses/gdotnet View archives and manage your subscription(s) at http://discuss.develop.com
