Using enum in c++ and c# via c++ header

Question

I've got a server written in C++ that sits at the end of a named pipe, um, serving things. The commands which can be sent to the server are defined in an enum which is located in a header file.

enum {
    e_doThing1,
    e_doThing2
    ...
    e_doLastThing
};

The value of the desired enum is put into the first byte of messages sent to the server so it knows what to do. I am now writing a C# client which needs access to the services.

Is there any way I can include the header into the C# code so I don't have to maintain the same list in two locations?

Thanks, Patrick

possible duplicate of Sharing an enum from C#, C++/CLI, and C++ — Ben Voigt
– Ben Voigt, Commented Aug 11, 2010 at 14:38

Puppy · Accepted Answer · 2010-08-11 14:33:58Z

3

If you were to put the enum in a namespace and give it a name, you could probably just add the header file directly to the C# project.

Edited with final solution:
That way around won't work, but the reverse will - name the header a .cs and include in C# project, then #include from C++.

edited Aug 11, 2010 at 14:33

answered Aug 11, 2010 at 11:23

Puppy

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2 Comments

Patrick Over a year ago

Nice idea, you don't need the namespace but you do need to rename the file as a *.cs otherwise the compiler doesn't see the enum (the enum already had a name). Shame it couldn't be that simple :(

Puppy Over a year ago

@Patrick: Nothing stops the C++ compiler #including a .cs file.

BlueMonkMN · Accepted Answer · 2010-08-11 11:22:32Z

1

Can you generate a copy of the file with an automated process like a pre-build step defined on the C# project? All you need to do is create a copy of the file that adds a name between "enum" and "{", I think.

Edit: Depending on what kind of interface your C++ server exposes, .NET may even be able to automatically generate an interface file. For example, if this enum were defined in a COM interface or a .NET remoting interface, I think there would be automatic means of generating the enum on the client based on the server's compiled code.

answered Aug 11, 2010 at 11:22

BlueMonkMN

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Comments

codymanix · Accepted Answer · 2010-08-11 14:37:29Z

1

You can use managed C++ for that. Include the header in a managed C++ project and you can use it from C#.

answered Aug 11, 2010 at 14:37

codymanix

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Comments

Ram kiran Pachigolla · Accepted Answer · 2012-11-29 03:23:59Z

0

You can use macro definition like this: on C# wrapper:

public enum class eAlgId
 {
   ENUM_PARAMETERS
 };

on cpp:

enum ProcAlgID
{
 ENUM_PARAMETERS 
};

and on .h file that is known to both:

#define ALG_ENUM_PARAMETERS \

et1 = 0, et2, et3, et4

edited Nov 29, 2012 at 3:23

Ram kiran Pachigolla

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answered Feb 21, 2011 at 9:22

Cony

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