dotnet remoting: The _r.Execute Method always works, no problem (see below).
But when I call _r.GetStatistics() the client fails with the exception shown
below.

It all works if I run the client and the server on the same network, but the
GetStatistics fails when client and server is on different networks. I am
calling the server this way from the client

ro.ri _r =
(ro.ri)Activator.GetObject(typeof(ro.ri),"http://www.webserver.com:1236/s");

And
string str = _r.Execute("test command"); // <-- Works
ro.Statistics stats = _r.GetStatistics(); // <-- Fails

It seems like it fails when my custom object is returned, but not when int
or string
is returned from the server. As if two-way only works for built-in types. I
GetStatistics() call actually makes it to the server and the server does not
receive any errors.

Any help much appreciated.

Thanks & have a great day,
Jakob


===


My interface for the remoting object

using System;
using System.Collections.Generic;
using System.Text;

namespace ro
{

public interface Statistics
{
int CallsServedCtr {get;}
string TheStory {get;}
}

public interface ri
{
string Execute(string Command);
Statistics GetStatistics();
}
}

It is implemented this way on the server side

using System;
using System.Collections.Generic;
using System.Text;

namespace s
{
[Serializable]
class rii : MarshalByRefObject, ro.ri
{
protected Server _server = null;

public override object InitializeLifetimeService()
{
return null;
}

public rii()
{
_server = s.Server.TheForm;
}

public string Execute(string Command)
{
_server.CallsServed++;
return Command + " was executed, all went just fine";
}

public ro.Statistics GetStatistics()
{
_server.CallsServed++;
StatisticsImplmentation stats = new
StatisticsImplmentation(_server);
return stats;
}

}

[Serializable]
class StatisticsImplmentation : MarshalByRefObject, ro.Statistics
{

public StatisticsImplmentation(Server server)
{
_callsServedCtr = server.CallsServed;
_theStory = "Ok, here's story as of " +
DateTime.Now.ToLongTimeString();

}

private int _callsServedCtr;
public int CallsServedCtr
{
get { return _callsServedCtr; }
set { _callsServedCtr = value; }
}

private string _theStory;
public string TheStory
{
get { return _theStory; }
set { _theStory = value; }
}

}
}


Exception on client.


See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.Net.WebException: Unable to connect to the remote server --->
System.Net.Sockets.SocketException: A connection attempt failed because the
connected party did not properly respond after a period of time, or
established connection failed because connected host has failed to respond
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot,
SocketAddress socketAddress)
at System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure,
Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState
state, IAsyncResult asyncResult, Int32 timeout, Exception& exception)
--- End of inner exception stack trace ---

Server stack trace:
at System.Net.HttpWebRequest.GetRequestStream()
at
System.Runtime.Remoting.Channels.Http.HttpClientTransportSink.ProcessAndSend(IMessage msg, ITransportHeaders headers, Stream inputStream)
at
System.Runtime.Remoting.Channels.Http.HttpClientTransportSink.ProcessMessage(IMessage
msg, ITransportHeaders requestHeaders, Stream requestStream,
ITransportHeaders& responseHeaders, Stream& responseStream)
at
System.Runtime.Remoting.Channels.SoapClientFormatterSink.SyncProcessMessage(IMessage msg)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage
reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData&
msgData, Int32 type)
at ro.Statistics.get_TheStory()
at c.Client.GetStatistics_Click(Object sender, EventArgs e) in
C:\Remoting1\c\Client.cs:line 87
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons
button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.832 (QFE.050727-8300)
CodeBase:
file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
c
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Data/Remoting1/c/bin/Debug/c.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.832 (QFE.050727-8300)
CodeBase:
file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.832 (QFE.050727-8300)
CodeBase:
file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.832 (QFE.050727-8300)
CodeBase:
file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Configuration
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.832 (QFE.050727-8300)
CodeBase:
file:///C:/WINDOWS/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.832 (QFE.050727-8300)
CodeBase:

I'm not sure if this is related to the exception you are receiving, but it
seems kind of odd that your StatisticsImplmentation (which is spelled
incorrectly by the way :) ) is marked serializable AND inherits from
MarshalByRefObject. Do you want GetStatistics to return an instance of a
StatisticsImplmentation back to the caller or just a reference to a
StatisticsImplmentation that still lives on the server? If an object you
are returning inherits from MarshalByRefObject, then only a reference will
be returned to the caller (thus the name: "Marshal By Reference Object").

I'm guessing you want to return a serialized copy of the new
StatisticsImplmentation back to the caller. I would remove the
MarshalByRefObject base class from StatisticsImplmentation and try that.

Hope that helps
Joel

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