C++ interface assembly not visible in other .NET projects

C++ interface assembly not visible in other .NET projects

• KUCL

  In C++ this needs to be:

  public: property String^ CorrelationId;

  instead of:
  
  public property String^ CorrelationId;
  

  
  
  

• Peter Gummer

  Doh!

  That was it, I thought that creating an interface only assembly I wouldn't need the corresponding .cpp file (and Jonathan .. that is why it compiled because the header was ignored) .. thanks both!

  
  
  

• VBnEWb

  Interesting. Reflector does not show the Userdefined namespace (ENET) nor its contents. I neglected to mention that, these assemblies only have the interface definition in them, not any interface implementation, so basically they are just a .h file. Also they have not been registered in the GAC.

  -the first .h file built with /clr as assembly

  // EMOM.h

  #pragma once

  #include "..\EMOM2\EMOM2.h"

  using namespace System;

  namespace ENET {

  public interface class IQueue

  {

  public property String^ Action;

  public property String^ Policy;

  public property String^ Originator;

  public IMessage^ GetMessage(long lngTimeOut );

  public void PutMessage(IMessage^ objMessage);

  public IMessage^ GetBadMessage(long lngTimeOut, IMessage^ objMessage, bool isBad);

  };

  public interface class ISession

  {

  public property String^ OriginatorName;

  public IQueue^ GetQueueFromContext(String^ strContext);

  public IQueue^ GetQueue(String^ strAction, String^ strPolicy);

  public IQueueListener^ GetListener(String^ strAction, String^ strPolicy );

  public void FreeQueue(IQueue^ objQueue);

  public void FreeListener(IQueueListener^ objListener);

  public IQueueDef^ GetQueueDefFromContext(String^ strContext );

  };

  }

  - The 2nd .h file built with /clr as an assembly

  // EMOM2.h

  #pragma once

  using namespace System;

  using namespace System::Runtime::InteropServices;

  namespace ENET {

  [ComVisibleAttribute(true)]

  public interface class IMessage

  {

  public void InitFromBuffer(String^ s);

  public String^ AsBuffer();

  public String^ ClassName();

  public long MessageSize();

  };

  [ComVisibleAttribute(true)]

  public interface class ICallBackObject

  {

  public void CallBack(String^ strContext);

  };

  [ComVisibleAttribute(true)]

  public interface class IQueueListener

  {

  public property Boolean Enable;

  public property ICallBackObject^ CallBackObject;

  public property String^ CallBackObjectName;

  public property String^ UserData;

  };

  [ComVisibleAttribute(true)]

  public interface class IQueueDef

  {

  public property String^ QueueName;

  public String^ AsString();

  public IQueueDef^ InitFromString( String^ strInitString);

  public void Initialize( String^ strServiceName, String^ strTargetServiceName, String^ strPolicy);

  public property String^ Key;

  public property String^ ModuleName;

  public property String^ OriginatorName;

  public property String^ ActionName;

  public property String^ PolicyName;

  public property Boolean NoMsgHeader;

  public property String^ DefaultMsgClassName;

  public property String^ MessageComponentName;

  };

  public interface class IMessageDescriptor

  {

  public property String^ CorrelationId;

  public property Object FLAGS;

  };

  }

  
  
  

• PierreDSavard

  Note: you can compile a standalone header file - you just need to tell the compiler to treat the header file as a *.cpp file. For example:

  cl /clr /LD /Tp file.h

  
  
  

• Ananda Ganesh

  This is probably not related but code like:
  
  public property String^ CorrelationId;
  
  should not compile.

  
  
  

• Bill116

  You may want to take a look at the assembly with .Net Reflector. If that doesn't help, can you post the code for us
  
  

• deepak sv

  Shouldn't there be a corresponding cpp file It should have the following contents:

  #include "stdafx.h" // this line may or may not be necessary
  #include "EMOM.h"

  Without a cpp file, the compiler will completely ignore the header.

  
  
  

• LessXa

  Jonathan, The project (which only contains the .h file above) does compile. But the interfaces are not accessible.

  (aside: why should this not compile and what would you do different )

  
  
  
• C++ interface assembly not visible in other .NET projects