How to access c++ dll class in c# code

Question

I have a C++ class in my 3rd party dll.

If I call Assembly.LoadFrom(), VS throws up an unhandled exception as there is no manifest contained in the module.

I can call global functions using DllImport to get an instance of a certain class.

How do I then call one of its member functions?

take a look "Calling C++ Unmanaged Class from C#" blogs.msdn.com/b/sanpil/archive/2004/07/07/175855.aspx — volody
– volody, Commented May 16, 2012 at 14:33

Indy9000 · Accepted Answer · 2012-05-16 16:29:05Z

2

Create a wrapper DLL with C++/CLI exposing C++ functions

for example:

//class in the 3rd party dll
class NativeClass
{
    public:
    int NativeMethod(int a)
    {
        return 1;
    }   
};

//wrapper for the NativeClass
class ref RefClass
{
    NativeClass * m_pNative;

    public:
    RefClass():m_pNative(NULL)
    {
        m_pNative = new NativeClass();
    }

    int WrapperForNativeMethod(int a)
    {
        return m_pNative->NativeMethod(a);
    }

    ~RefClass()
    {
        this->!RefClass();
    }

    //Finalizer
    !RefClass()
    {
        delete m_pNative;
        m_pNative = NULL;
    }
};

edited May 16, 2012 at 16:29

answered May 16, 2012 at 16:09

Indy9000

8,8712 gold badges35 silver badges38 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Tilak · Accepted Answer · 2012-05-16 14:56:18Z

1

Assembly.LoadFrom is used to load managed assembly.

For unmanaged assemblies P/Invoke is required.

How to Marshal c++ class

answered May 16, 2012 at 14:56

Tilak

30.8k19 gold badges85 silver badges133 bronze badges

Collectives™ on Stack Overflow

How to access c++ dll class in c# code

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related