How to export an enum from dll

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Hey everyone.

I have an enum which is shown below:

enum Open
{
     OPEN_COULD_NOT_OPEN_PORT = 1, ///&lt; Could not open the port
     OPEN_COULD_NOT_SET_UP_PORT, ///&lt; Could not set up the port
     OPEN_INVALID_BAUD_RATE, ///&lt; Baud rate is not valid
     OPEN_COULD_NOT_SET_BAUD, ///&lt; Baud rate valid, but could not set it
     OPEN_ALREADY_OPEN ///&lt; Connection was already open
};

To use in my C# solution, I export it this way:

C#

__declspec(dllexport) enum __stdcall Open{
    OPEN_COULD_NOT_OPEN_PORT = 1,
    OPEN_COULD_NOT_SET_UP_PORT,
    OPEN_INVALID_BAUD_RATE,
    OPEN_COULD_NOT_SET_BAUD,
    OPEN_ALREADY_OPEN
};

When I call from C#, I can't access that enum?
Is there any other way to do this?

My best regards...

Posted 4-Dec-11 22:34pm

Un_NaMeD

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Albert Holguin 5-Dec-11 9:48am

See my comment to solution 2...

2 solutions

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CPallini · Answer 1 · 2011-12-04T23:04:00

Solution 1

You cannot export an enum (at least AFAIK). You might encapsulate the enum 'functionality' in a class and export such class (this way it would be similar to a C# enum that is, actually a class).

Posted 4-Dec-11 23:04pm

CPallini

Comments

Un_NaMeD 5-Dec-11 5:07am

Oh. I get it.
Then export the class as a function or a propety?

CPallini 5-Dec-11 5:22am

You may export a whole class, see for instance:
http://www.codeproject.com/KB/cs/marshalCPPclass.aspx

Albert Holguin 5-Dec-11 9:49am

That's one way to do it, but it's a lot of trouble if you're just exporting one enum.

Albert Holguin 5-Dec-11 9:50am

Good suggestion, although probably not the easiest way to do this. +5

CPallini 5-Dec-11 13:47pm

Thank you. BTW I agree with you.

elgaabeb · Answer 2 · 2011-12-04T23:12:00

Solution 2

Hi,

Look at this thread, it is talking about your issue.

c-dll-c-types-exporting[^]

It says that you don't need to export your enumerate, just include the header where it is defined.
Note that you need to tune your enum definition in your header file.

Hope that would help.

Best regards.
EL GAABEB.

Posted 4-Dec-11 23:12pm

elgaabeb

Updated 4-Dec-11 23:14pm

v2

Comments

Albert Holguin 5-Dec-11 9:48am

I was going to suggest the same thing... there's really no reason to have to export an enumeration in a compiled manner. +5

elgaabeb 5-Dec-11 9:50am

Thx :) Albert.