简介

C++/CLI简介见上文 C#调用C++ （使用C++/CLI） - 咸鱼翻身？ - 博客园 (cnblogs.com)

新建解决方案->CPlusCSharpSolution

新建C#类库->CSharpNative

新建类NativeCalculate

1     public class NativeCalculate
2     {
3         public int Add(int a, int b)
4         {
5             return a + b;
6         }
7     }

新建CLI类库（DLL）->CSharpWrapper

 添加CSharpNative引用

 添加NativeCSharpWrapper类

//NativeCSharpWrapper.h

#pragma once

using namespace System;

namespace CSharpWrapper {
    public ref class NativeCSharpWrapper
    {
        public:
        static int Add(int a, int b);
    };
}

//NativeCSharpWrapper.cpp

#include "pch.h"

#include "NativeCSharpWrapper.h"

using namespace CSharpWrapper;
using namespace CSharpNative;

int NativeCSharpWrapper::Add(int a, int b) {
    int sum = 0;
    NativeCalculate^ nativeCalculate = gcnew NativeCalculate(); // 创建C#类的实例
    sum = nativeCalculate->Add(a, b); // 调用C#方法
    return sum;
}

创建非托管类NativeCSharpWrapper 

创建非托管类调用NativeCSharpWrapper 并提供对外导出

//NativeCalculate.h

#pragma once
#ifndef NATIVE_CLASS_H
#define NATIVE_CLASS_H

class __declspec(dllexport) CPlusCalculate {
public:
    static int Add(int a, int b);
};
#endif // NATIVE_CLASS_H

// NativeCSharpWrapper.cpp

#include "pch.h"
#include "NativeCSharpWrapper.h"

using namespace CSharpWrapper;
using namespace CSharpNative;

int NativeCSharpWrapper::Add(int a, int b) {
    int sum = 0;
    NativeCalculate^ nativeCalculate = gcnew NativeCalculate(); // 创建C#类的实例
    sum = nativeCalculate->Add(a, b); // 调用C#方法
    return sum;
}

新建C++控制台项目->CPlusConsoleApplication

添加包含目录 CSharpWrapper.h

添加CSharpWrapper.lib附加库目录

添加附加库依赖项CSharpWrapper.lib

main函数调用

main函数调用C++/CLI项目CSharpWrapper进而调用CSharpNative

#include <iostream>
#include "CPlusCalculate.h"
int main()
{
    int sum = CPlusCalculate::Add(50, 40);
}