Question about COM-Interop.

Hot Topic

Measure data-traffic per IP-adress
Scan entire hard drive?
Try refreshing the table adapter
specifying credentials for reading file from UNC path
Using XSD
Help with TripleDES and RC2 cryptography.
2.0 DataSet using whitespace instead of empty String
Creating List<> at runtime
getting the windows login name when using application-defined authentication mode
tcplistener and winxp service

.NET Development

What performance counter must i use for memory monitoring?
Create Validation Regular Expression
XPath query problem
Using .NET 2 with Borland Developer Studio 2006
System.BadImageFormatException after SP1
WMI to get file/directory info
Reflection + late bound COM object = not working.
A Cosmetic Question
Connecting to Access Database
Consuming .net serviced component using VB6.0 gives permission denied error

Question about COM-Interop.

Hi,

I have written a COM-Server (InProcServer32, Dll)
that I'd like to use with .NET (The server contains some
API-wrappers, that cannot be easily accessed via P/Invoke).

To test my server, I have created a C#-Project and
included a reference to my server.
VS2005 has correctly created a Wrapper-Dll from
the type-library.

But when I try to create an instance of the CoClass
in question, I receive a COMException with a HRESULT
of 0x80040154 REGDB_E_CLASSNOTREG, means that the class
is not properly registered!

But the class IS registered!
I have checked the registry and have also tested
the server with an "unmanaged" C++-Client before!

Anyone out there who can help me

Thanks in advance

Reiner

Answer this question

Question about COM-Interop.

  • Tdar

    Below is my code and Yes I have checked the Interop-Assembly.

    using System;

    using System.Runtime.InteropServices;

    using CeFileExchLib;

    static void Main(string[] args)

    {

    CeFileExchangerClass fileExch;

    fileExch = new CeFileExchangerClass();

    fileExch.RapiConnectDevice();

    }

    regards

    Reiner

  • soconne

    Are you sure you are creating an instance of the right class
     
    Willy.
     
     

    Hi,

    I have written a COM-Server (InProcServer32, Dll)
    that I'd like to use with .NET (The server contains some
    API-wrappers, that cannot be easily accessed via P/Invoke).

    To test my server, I have created a C#-Project and
    included a reference to my server.
    VS2005 has correctly created a Wrapper-Dll from
    the type-library.

    But when I try to create an instance of the CoClass
    in question, I receive a COMException with a HRESULT
    of 0x80040154 REGDB_E_CLASSNOTREG, means that the class
    is not properly registered!

    But the class IS registered!
    I have checked the registry and have also tested
    the server with an "unmanaged" C++-Client before!

    Anyone out there who can help me

    Thanks in advance

    Reiner

  • mivecxtr

    Try

    [STAThread]

    static void Main()

    Maybe you're not able to marshal the call to the STA.

  • Marek Istvanek

    Willy,

    yes, I'm absolutely sure...

    best regards

    Reiner

  • titote

    Sorry, that's not the reason! Below is a copy of the Exception-Details from VS2005 and the code from my "unmanaged" client. Maybe this can help.

    System.Runtime.InteropServices.COMException was unhandled
    Message="Retrieving the COM class factory for component with CLSID {C84B4E51-96EB-4071-AC21-C3EAD122358C} failed due to the following error: 80040154."
    Source="sharpcom"
    ErrorCode=-2147221164
    StackTrace:
    at sharpcom.Program.Main(String[] args) in G:\Develop\VS2005\sharpcom\sharpcom\Program.cs:line 16
    at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
    at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
    at System.Threading.ThreadHelper.ThreadStart()

    This is the code that works fine in the "native" C++-Client:

    // class DECLSPEC_UUID("C84B4E51-96EB-4071-AC21-C3EAD122358C") CeFileExchanger;

    hResult = ::CoInitialize(NULL);

    hResult = ::CoGetClassObject(CLSID_CeFileExchanger, CLSCTX_INPROC_SERVER, NULL, IID_IClassFactory, void**)&pFactory);

    hResult = pFactory->CreateInstance(NULL, IID_ICeFileExchanger, (void**)&pFileExch);

    regards

    Reiner

  • stombiztalker

    Mind to post the offending C# code
    Did you inspect the interop assembly for the correct class object
     
    Willy.
     

    Willy,

    yes, I'm absolutely sure...

    best regards

    Reiner
  • Question about COM-Interop.
Answer this question