Question

我在C ++ / CLI中编写了一个Wrapper程序集。现在我想从C＃调用C ++ / CLI，但是我得到错误：

Error CS0122  'USBWrapper.setPortDisable(int)' is inaccessible due to its protection level

所以我的.h和.cpp文件如下（使用/ clr开关编译）：

.h文件：

// USBFunctionsWrapper.h

#pragma once

#include "C:\Users\admin\Downloads\brainstem_dev_kit_win32_i386_17\brainstem_dev_kit_win32_i386\development\lib\BrainStem2\BrainStem-all.h"
#include "C:\Users\admin\Downloads\brainstem_dev_kit_win32_i386_17\brainstem_dev_kit_win32_i386\development\lib\BrainStem2\aUSBHub2x4.h"

using namespace System;

namespace USBFunctionsWrapper {

public ref class USBWrapper
{
    public:
        USBWrapper();
        ~USBWrapper();
        aErr setPortDisable(int portNumber);
        aErr setPortEnable(int portNumber);
        aErr usbSleep(int time);
    private:
};
}

.cpp文件：

// This is the main DLL file.
#include "stdafx.h"

#include "USBFunctionsWrapper.h"

#include "C:\Users\admin\Downloads\brainstem_dev_kit_win32_i386_17\brainstem_dev_kit_win32_i386\development\lib\BrainStem2\BrainStem-all.h"
#include "C:\Users\admin\Downloads\brainstem_dev_kit_win32_i386_17\brainstem_dev_kit_win32_i386\development\lib\BrainStem2\aUSBHub2x4.h"
aUSBHub2x4 stem;
aErr err = aErrNone;
USBFunctionsWrapper::USBWrapper::USBWrapper() {
    err = stem.linkDiscoverAndConnect(USB);
}
USBFunctionsWrapper::USBWrapper::~USBWrapper() {
    err = stem.linkDisconnect();
}
aErr USBFunctionsWrapper::USBWrapper::setPortDisable(int portNumber) {
    return stem.usb.setPortDisable(portNumber);
}

aErr USBFunctionsWrapper::USBWrapper::setPortEnable(int portNumber) {
    return stem.usb.setPortEnable(portNumber);
}

aErr USBFunctionsWrapper::USBWrapper::usbSleep(int time) {
    return aTime_MSSleep(time);
}

我正在调用这些函数的C＃文件：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using USBFunctionsWrapper;

namespace USBPortWrapper
{
    public class WrapperClass
    {
        USBWrapper usb;
        public WrapperClass()
        {
            usb = new USBWrapper();
        }

        public void setPortEnable(int portNumber)
        {
            usb.setPortEnable(portNumber);
        }
    }
}

我在c＃代码中收到usb.setPortEnable(portNumber)函数的错误。你知道这可能是什么原因吗？

无法在C＃中访问C ++ / CLI包装器类的公共方法

0 个答案: