Hi ,

I have a problem passing enum as a parameter in my C# code.
I tried declaring the parameter as int as well as long . I even tried using 
MarshalAs attribute.
I am getting exception saying parameters are not matching.
This code is talking to a C++ DLL that takes enum as one of the parameters.

Regards
Kris

>I tried declaring the parameter as int as well as long .


Why not the actual enum type?



>I am getting exception saying parameters are not matching.


Can you please post the exact exception type and error message, as
well as the signatures (both in C++ and C#) of the function you're
caling.


Mattias

-- 
Mattias Sjgren [C# MVP]  mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

Hi mattias,



I have mapped it to enum , but still it does not work.

Can you please help me.





Please check below the exact signatures for the functions.

Also please check the structures declarations in both C# and c++.

/////////////////////////////////////////////////////////////////////////////////////

//this is in C++

DLL_EXPORT long __stdcall Connect(char *pServer, long port, XS_Mode mode); 
/////////////////////////////////////////////////////////////////////////////////////



//this is in C#

[DllImport("compt.dll", CharSet = CharSet.Ansi,CallingConvention = 
CallingConvention.StdCall)]



public static extern long Connect(string pServer, long port, XMode mode); 
/////////////////////////////////////////////////////////////////////////////////////



//this is in C++

typedef enum _X_Mode {



NONE = 1,



SERVER = 2,



LOCAL = 3



} XSMode;



/////////////////////////////////////////////////////////////////////////////////////

//this is in C#

public enum XMode



{



NONE = 1,



SERVER = 2,



LOCAL = 3



};

/////////////////////////////////////////////////////////////////////////////////////

"Mattias Sjgren"  wrote in message 
news:e6LnNe1uHHA.5036@TK2MSFTNGP03.phx.gbl...

>
>>I tried declaring the parameter as int as well as long .
>
> Why not the actual enum type?
>
>
>>I am getting exception saying parameters are not matching.
>
> Can you please post the exact exception type and error message, as
> well as the signatures (both in C++ and C#) of the function you're
> caling.
>
>
> Mattias
>
> -- 
> Mattias Sjgren [C# MVP]  mattias @ mvps.org
> http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
> Please reply only to the newsgroup. 

kris wrote:


> public static extern long Connect(string pServer, long port, XMode mode); 


C# "long" ist 64-bit, so you should use int for port and return value.

Hi Chris,

Thanks a lot, it works.

Regards
Kris


"Christian Frschlin"  wrote in message 
news:f6attu$n0s$1@svr7.m-online.net...

> kris wrote:
>
>> public static extern long Connect(string pServer, long port, XMode mode);
>
> C# "long" ist 64-bit, so you should use int for port and return value.