c#调用c++写成的dll文件

c#调用c++写成的dll文件

首先是c++写的声明文件

// Inclusion guard

#ifndef _DLLTUT_DLL_H_

#define _DLLTUT_DLL_H_

// Make our life easier, if DLL_EXPORT is defined in a file then DECLDIR will do an export

// If it is not defined DECLDIR will do an import

#if defined DLL_EXPORT

#define DECLDIR __declspec(dllexport)

#else

#define DECLDIR __declspec(dllimport)

#endif

// Specify "C" linkage to get rid of C++ name mangeling

extern "C"

{

// Declare 2 functions

DECLDIR int Add( int a, int b );

DECLDIR void Function( void );

}

// End the inclusion guard

#endif

测试程序的目录结构

测试代码c#

using System;

using System.Collections.Generic;

using System.Text;

using System.Runtime.InteropServices;

namespace ConsoleApplication30

{

class Program

{

static void Main(string[] args)

{

test.Function();

Console.WriteLine("result: " + test.Add(2, 3).ToString());

Console.ReadLine();

}

}

class test

{

[DllImport("..\\..\\lib\\DLLTest.dll")]

public static extern void Function();

[DllImport("..\\..\\lib\\DllTest.dll")]

public static extern int Add(int i,int j);

}

}
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