2

I am trying to finish a simple tutorial for using c++ library with c# console application. Here I have a simple class library:

cpp file:

#include "stdafx.h"

#include "ClassLibraryCPP.h"

using namespace ClassLibraryCPP;

void myClass::test() 
{
    Console::WriteLine("hello cpp/cli!");
}

header file:

#pragma once

using namespace System;

namespace ClassLibraryCPP
{

    public class myClass
    {
    public:
        void test();
    };
}

and now here is my c# console:

using ClassLibraryCPP;

namespace ConsoleApplicationCS
{
    class Program
    {
        static void Main(string[] args)
        {
            myClass testClass;
            testClass = new myClass();
            testClass.test();
        }
    }
}

and I get this:

'myClass' does not contain a definition for 'test' and no extension method 'test' accepting a first argument of type 'myClass' could be found (are you missing a using directive or an assembly reference?)

But I have made myClass and test method public so why .test() is not visible to console application?

Update: adding ref to make managed class and then rebuilding the C++ project (by right clicking and rebuild not just rebuilding the solution) solved the problem. I also found this question related: C# code can't "see" the methods in my C++ dll I still don't get how this works: https://www.youtube.com/watch?v=xTRTY-fOIe8&t=1800s

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Saeid
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1 Answers1

4

Make your class managed:

public ref class myClass
{
public:
    void test();
};

Change method declaration:

void ClassLibraryCPP::myClass::test()
{
  Console::WriteLine("hello cpp/cli!");
}
Sergey Vasiliev
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