Rob,
I tried following 2 ways based on your instruction, still doesn't work:
(Note: both client and server read from config file for intial Factory
object)
(Way 1) CLIENT side:
......
IRemoteFactory fact =
(IRemoteFactory)RemotingHelper.CreateProxy(typeof
(IRemoteFactory));
IRemoteObject iro = (IRemoteObject)Factory.CreateInstance();
IRemoteObject.GetValue;

SERVER side:
class RemoteObject : MarshalByReference, IRemoteObject
{
.....
}

classs RemoteFactory
{
.......
IRemoteObject CreateInstance()
{
AppDomain ad = AppDomain.CreateDomain("My second domain");
string portName = Guid.NewGuid().ToString();
ChannelServices.RegisterChannel(new IpcChannel(portName));
return ( (RemoteObject)ad.CreateInstanceAndUnWrap(....));
}
.......
}

Server side I got error says: The channel 'ipc' is already registered.
This is because in the server side configuration file, the initial
RemoteFactory object is registed by 'ipc'

(Way 2)CLIENT side:
no code change
SERVER side
add following line under "ChannelServices.RegisterChannel(new
IpcChannel(...))":
RemotingConfiguration.RegisterWellKnowServiceType(
typeof(RemoteObject), "RemoteObject.rem",
WellKnowObjectMode.Singleton);

the rest of the server code are same.

Server side I got the same error as in (1)

QUESTIONS:
(1)do I miss anything here, looks like I can't create second IPC channel in
server since the first one is already created in the server config file. the
server side config file looks like following
....
<application>
...
<service>
<wellknown type="General.RemoteFactory, MyFactoryAssemble"
objectUri="RemoteFactory.rem"
mode="Singleton" />
</service>
<channels>
<channel ref="ipc" portName="MyFirstPort" />
</channels>
...
</application>
....
client side has a corresponding config file.

(2)at client side, I don't know anything about RemoteObject with newly
created "protName" by server?
this might be a stupid question:
at client side do I need to register the RemoteObject with portName? if
yes how the server pass the created "portName" to client?

(3) since the RemoteObject instance(reference?) is created by second
appdomain, however the channel registration is still in the first domain,
could that be the problem?

Thanks!
Hang


[quoted text, click to view]

Hank,

[quoted text, click to view]

The are probably a lot of solutions. One of them is:
"execute" the assembly in the new domain:

In your server

public class Server : MarshalByRefObject, IServerApi
{
public IFooObject CreateFooObject ()
{
AppDomain d = AppDomain.CreateDomain ("Foo");
d.ExecuteAssembly ("server.exe", null, new string[]
{"/domain"});
FooObject f = (FooObject) d.CreateInstanceAndUnwrap
("server", "ACME.FooObject");
return f;
}
}


in your Main-method:


public static void Main(string[] args) {
if (args.Length > 0 && args[0] == "/domain") {
// new domain
// register the channel
ChannelServices.RegisterChannel ( ....);
}
else {
// first domain
// do the usual configuration
RemotingConfiguration.Configure(.....);
}
}


[quoted text, click to view]

Yoo don't need.

Rob,
Thanks for advising, now the idea is clear, i need call RegisterChannel in
the new appdomain, but the questions are:
(1)How to call "ChannelServices.RegisterChannel(new IpcChannel(portName))"
through the "ad" reference or some other mechanism such as event, could you
give me a very brief code snippet?
(2)How to let client know there is a new channel registered OR do I need to
let client know?
Thanks
Hank
[quoted text, click to view]

Hi Hank,

[quoted text, click to view]

You must call RegisterChannel in the new appdomain.

Rob,
It all worked out nicely. Thanks for all the help!
Hank

[quoted text, click to view]

Hi Hank,

[quoted text, click to view]

You're welcome!