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我有下一個C++的編譯後創建DLL文件如何在C＃中調用函數的DLL/Python的
// MathFuncsDll.h
#ifdef MATHFUNCSDLL_EXPORTS
#define MATHFUNCSDLL_API __declspec(dllexport)
#else
#define MATHFUNCSDLL_API __declspec(dllimport)
#endif
namespace MathFuncs
{
// This class is exported from the MathFuncsDll.dll
class MyMathFuncs
{
public:
// Returns a + b
static MATHFUNCSDLL_API double Add(double a, double b);
// Returns a - b
static MATHFUNCSDLL_API double Subtract(double a, double b);
// Returns a * b
static MATHFUNCSDLL_API double Multiply(double a, double b);
// Returns a/b
// Throws const std::invalid_argument& if b is 0
static MATHFUNCSDLL_API double Divide(double a, double b);
};
}
// MathFuncsDll.cpp : Defines the exported functions for the DLL application.
//
#include "stdafx.h"
#include "MathFuncsDll.h"
#include <stdexcept>
using namespace std;
namespace MathFuncs
{
double MyMathFuncs::Add(double a, double b)
{
return a + b;
}
double MyMathFuncs::Subtract(double a, double b)
{
return a - b;
}
double MyMathFuncs::Multiply(double a, double b)
{
return a * b;
}
double MyMathFuncs::Divide(double a, double b)
{
return a/b;
}
}
我有dll文件 ，我想打電話給例如ADD功能代碼
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace call_func
{
class Program
{
[DllImport("MathFuncsDll.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern double MyMathFuncs::Add(double a, double b);
static void Main(string[] args)
{
Console.Write(Add(1, 2));
}
}
}
但得到這個消息 error img
或Python代碼
Traceback (most recent call last):
File "C:/Users/PycharmProjects/RFC/testDLL.py", line 6, in <module>
result1 = mydll.Add(10, 1)
File "C:\Python27\lib\ctypes\__init__.py", line 378, in __getattr__
func = self.__getitem__(name)
File "C:\Python27\lib\ctypes\__init__.py", line 383, in __getitem__
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: function 'Add' not found
請幫忙 我該如何修復這段代碼，並調用例如ADD函數。
謝謝