I am developing a tiered app with UI layer (let's call it UI.exe) , object
state layer (call it state object (SO.dll)) and a business object layer
(BO.dll) UI.EXE and SO.dll is on the client’s pc while BO.dll is deployed
on a COM+ machine somewhere. The aim is to develop it in such a way that
I can use 1) HTTP to host the BO.dll or 2) use a Windows service and TCP
(least likely secenario) or 3) use good old DCOM and host the DLL in COM+.
All of the above is working, and I can actually switch between DCOM and
IIS hosting by changing an entry in my config file etc. The problem that
I have is that I need to use only one BO.dll, as this will be shared
between DCOM users and IIS. The following prevents me from doing that
however:
* Using DCOM and COM+ to host my DLL
The BO dll has to be compiled as (ActivationOption.Server) and all is OK
* Using IIS to host my DLL
When using (ActivationOption.Library) all is OK. When changing to
(ActivationOption.Server) however I get the following funny:
The BO function is activated and runs through all the code without
errors. I do a .Setcomplete on the transaction, and that works fine as
well. When the proxies start to serialize my variables (at least that is
when I think this happens) I get the following error
Err No: 13 : Method is not supported. –
Server stack trace:
at System.Runtime.Remoting.Messaging.MethodResponse.GetArgName(Int32
index)
at System.Runtime.Remoting.Messaging.ArgMapper.GetArgName(Int32 argNum)
at System.Runtime.Remoting.Messaging.SoapMessageSurrogate.GetObjectData
(Object obj, SerializationInfo info, StreamingContext context)
at
System.Runtime.Serialization.Formatters.Soap.WriteObjectInfo.InitSerialize
(Object obj, ISurrogateSelector surrogateSelector, StreamingContext
context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter
converter, SoapAttributeInfo attributeInfo)
at
System.Runtime.Serialization.Formatters.Soap.WriteObjectInfo.Serialize
(Object obj, ISurrogateSelector surrogateSelector, StreamingContext
context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter
converter, SoapAttributeInfo attributeInfo)
at System.Runtime.Serialization.Formatters.Soap.ObjectWriter.Serialize
(Object graph, Header[] inHeaders, SoapWriter serWriter)
at System.Runtime.Serialization.Formatters.Soap.SoapFormatter.Serialize
(Stream serializationStream, Object graph, Header[] headers)
at System.Runtime.Remoting.Channels.CoreChannel.SerializeSoapMessage
(IMessage msg, Stream outputStream, Boolean includeVersions)
at
System.Runtime.Remoting.Channels.SoapServerFormatterSink.SerializeResponse
(IServerResponseChannelSinkStack sinkStack, IMessage msg, Boolean
bClientIsClr, ITransportHeaders& headers, Stream& stream)
at
System.Runtime.Remoting.Channels.SoapServerFormatterSink.ProcessMessage
(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders
requestHeaders, Stream requestStream, IMessage& responseMsg,
ITransportHeaders& responseHeaders, Stream& responseStream)
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 PlutoBO.clsPublisherSVR.f_Load(String pstrSysXML, Int64 pintID,
String& pstrXML) in D:\projects\PROGRAMS\VB7
\Pluto\PlutoBO\clsPublisherSVR.vb:line 114
at PlutoSO.clsPublisher.Load(Int32 pintID) in D:\projects\PROGRAMS\VB7
\Pluto\PlutoSO\clsPublisher.vb:line 100
SO code does the following
----------------
RemotingConfiguration.Configure(lstrFile)
lobjBO = New PlutoBO.clsPublisherSVR()
Load = lobjBO.f_Load(lstrSystemXML, pintID, lstrXML)
-----------------
BO code does the following
--------------------
<Transaction(TransactionOption.Required), EventTrackingEnabled(True)> _
Public Class clsPublisherSVR
Inherits ServicedComponent
Public Function f_Load(ByVal pstrSysXML As String, ByVal pintID As Long,
ByRef pstrXML As String) As Boolean
Try
...
.. Do db access and load
...
If ContextUtil.IsInTransaction Then
ContextUtil.SetComplete()
End If
Catch e As Exception
...
End Try
End Function
End Class
So, I need some help to identify why I cannot use IIS to host components
with ActivationOption.Server. Microsoft’s samples are no help at all,
MSDN articles on this are very scarce and uses ActivationOption.Library,
but does not care to explain why.
Thanks
JC Oberholzer
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