设置包装程序以在C ++中使用C＃.dll

Question

I have a .Dll written in C#. I need to use this .Dll in a C++ application. After doing some research I am attempting to write a wrapper. I am still setting it up But I cannot get my project to compile. I have set my project up in Visual studio 2015, As a Visual C++, CLR, Class library project.

So far my code looks as follows: C# Class:

using System.Windows.Threading;
using System.Runtime.InteropServices;

namespace RF182CInterface
{
    public class RFIDInterface
    {
        public RFIDInterface()
        {
        .
        .
        .

.H file

// RFIDWrapper.h

#pragma once

using namespace System;

namespace RFIDWrapper {

    class RFIDWrapperIFacePrivate;

    class __declspec(dllexport) RFIDWrapperIFace
    {
    private:
        RFIDWrapperIFacePrivate* _private;

    public:
        RFIDWrapperIFace();
        ~RFIDWrapperIFace();
    };
}

.cpp file:

// This is the main DLL file.
#using "RF182CInterface.dll";

#include "stdafx.h"
#include <msclr\auto_gcroot.h>
#include "RFIDWrapper.h"

using namespace System::Runtime::InteropServices; // Marshal

class RFIDWrapperIFacePrivate
{
public:
    msclr::auto_gcroot<RF182CInterface::RFIDInterface^> rf182CInterface;
};

When I attempt to compile I get the following errors:

Warning 1 warning C4627: '#using "RF182CInterface.dll"': skipped when looking for precompiled header use
Error 2 error C2653: 'RF182CInterface' : is not a class or namespace name
Error 3 error C2065: 'RFIDInterface' : undeclared identifier
Error 4 error C2059: syntax error : '>' Error 5 error C2976: 'msclr::auto_gcroot' : too few template arguments

I believe they all stem from the warning where the .dll is skipped. The .dll is in the same folder as the .cpp and .h files.

What am I doing wrong?

Answer 1

#include "stdafx.h"必须是目标文件中的第一行 ，任何#using其后（或者更好的是，在其中）。