C++CLI语法 在项目中的使用

通常情况下，对一个标准的com组件进行集成，网上普遍使用的方式有：

1、#import *.dll 或 #import *.ocx的方式，VS编译器重新编译后，就会自动生成组件对应的*.tlh文件，该文件类似于头文件，含有com组件中的接口信息，在自己的项目中就可以引用接口或者类了。
2、#pragma comment(lib, "*.lib")的方式，这种方式可以直接引用lib里的接口声明。

好巧不巧：项目中碰到的三方组件恰好用这两种方式都不能集成：用第一种方式，VS生成的tlh文件内容是空的；第二种直接引用后，编译报错

通过三方组件给的C#调用的示例程序，发现该组件的目标运行平台必须选定是X86平台

自身项目属于C++范畴，所以在查阅部分资料后，遇到了C++/CLI

#include <Windows.h>

#include <stdio.h>

// 在做类型转换时用到
using namespace System;

// 组件的路径放在了本地，在实际运行中，将该组件放在了和运行程序的同目录下
#using "E:C_backup_20180315jzbankCallComSlnCallComDebugInterop.SmartCardLib.dll"

// SmartCardLib是Interop.SmartCardLib.dll内的命名空间
using namespace SmartCardLib;

// 组件的路径放在了本地，在实际运行中，将该组件放在了和运行程序的同目录下
#using "E:C_backup_20180315jzbankCallComSlnCallComDebugInterop.IObjectSafetyTLB.dll"

// IObjectSafetyTLB是Interop.IObjectSafetyTLB.dll内的命名空间
using namespace IObjectSafetyTLB;

// 时间工具
static SYSTEMTIME t;

void main(){

    // clsSmartCardClass是namespace SmartCardLib里的
    // cli语法 注意 ^ 和 gcnew
    clsSmartCardClass ^instance = gcnew clsSmartCardClass();

    int ret = -1;
    
    // namespace SmartCardLib里声明的方法
    ret = instance->Connect("param1");

    Sleep(3000);

    // cli语法 声明变量并初始化
    System::Object^    cardNo = gcnew System::Object();
    System::Object^    customNo1  = gcnew System::Object();
    System::Object^    orderdate1  = gcnew System::Object();
    System::Object^    orderAmount1  = gcnew System::Object();

    System::Object^    orderNum1  = gcnew System::Object();
    System::Object^    orderTotal1  = gcnew System::Object();
    System::Object^    fgs1 = gcnew System::Object();
    System::Object^    glz1  = gcnew System::Object();

    System::Object^    cardStatus1  = gcnew System::Object();
    System::Object^    cardPwd1  = gcnew System::Object();
    System::Object^    cardType1  = gcnew System::Object();
    System::Object^    chgPwd1 = gcnew System::Object();

                                                                // Int32
    int result = instance->readCard(cardNo, customNo1, orderdate1, orderAmount1,
                                    //
                                     orderNum1, orderTotal1, fgs1, glz1, 
                                    // 
                                     cardStatus1, cardPwd1, cardType1, chgPwd1);
                   
    
    // 文件生成在本地，临时写在特定目录
    FILE *pFile;
    fopen_s( &pFile, "C:\Users\Administrator\teller\device\1\infofile\info.txt", "w+" );

    if (result == 0)
    {
        char resv[32] = {0};
        
        
        //////////////////////////////////////////////
        // cli语法 将 System::String^ 转换为 char*
        strcpy(resv, (char*)(void*)System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi((System::String^)cardNo));
        printf("
ok, instance->readCard()-----------cardNo=%s", resv);

        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %s
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, resv);
        fflush(pFile);

        memset(resv, 0, sizeof(resv));


        //////////////////////////////////////////////
        strcpy(resv, (char*)(void*)System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi((System::String^)customNo1));
        printf("
ok, instance->readCard()-----------customNo1=%s", resv);

        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %s
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, resv);
        fflush(pFile);

        memset(resv, 0, sizeof(resv));


        //////////////////////////////////////////////
        strcpy(resv, (char*)(void*)System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi((System::String^)orderdate1));
        printf("
ok, instance->readCard()-----------orderdate1=%s", resv);

        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %s
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, resv);
        fflush(pFile);

        memset(resv, 0, sizeof(resv));


        //////////////////////////////////////////////
        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %d
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, (int)(System::Int32)orderAmount1);
        fflush(pFile);
        printf("
ok, instance->readCard()-----------orderAmount1=%d", (int)(System::Int32)orderAmount1);


        //////////////////////////////////////////////
        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %d
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, (int)(System::Int16)orderNum1);
        fflush(pFile);
        printf("
ok, instance->readCard()-----------orderNum1=%d", (int)(System::Int16)orderNum1);


        //////////////////////////////////////////////
        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %d
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, (int)(System::Int32)orderTotal1);
        fflush(pFile);
        printf("
ok, instance->readCard()-----------orderTotal1=%d", (int)(System::Int32)orderTotal1);



        //////////////////////////////////////////////
        strcpy(resv, (char*)(void*)System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi((System::String^)fgs1));
        printf("
ok, instance->readCard()-----------fgs1=%s", resv);
        
        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %s
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, resv);
        fflush(pFile);

        memset(resv, 0, sizeof(resv));


        //////////////////////////////////////////////
        strcpy(resv, (char*)(void*)System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi((System::String^)glz1));
        printf("
ok, instance->readCard()-----------glz1=%s", resv);

        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %s
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, resv);
        fflush(pFile);

        memset(resv, 0, sizeof(resv));


        //////////////////////////////////////////////
        strcpy(resv, (char*)(void*)System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi((System::String^)cardStatus1));
        printf("
ok, instance->readCard()-----------cardStatus1=%s", resv);

        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d %s
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, resv);
        fflush(pFile);
    }
    else
    {
        GetLocalTime(&t); 
        fprintf(pFile, "%4d/%02d/%02d %02d:%02d:%02d.%03d call readCard faild, ret=%d
", 
            t.wYear,t.wMonth,t.wDay,t.wHour,t.wMinute, t.wSecond,t.wMilliseconds, result);
    }

    fflush(pFile);
    fclose(pFile);
    pFile = NULL;

    int dret = instance->Disconnect();
    //printf("
--, instance->Disconnect()-----------dret=%d", dret);

    // 此处延时会导致程序即将结束时报错：Runtime error 217 at 。。。
    //Sleep(3000);

    //getchar();
}

 在C++项目中调用如下：

#include "LoadDll.h"

#include <ShlObj.h>

//用于生成文件夹 mkdir
#include <direct.h>
#include <string.h>

char exePath[MAX_PATH] = {0};
    ret = checkExePath(exePath, exeName);
    if(ret < 0) return ret;

    char params[256] = {0};
    sprintf(params, 
        "%s|%d|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s",
        funcName, timeout, compcode, 
        tmpCardNo, tmpcustomNo, 
        orderdate, orderNum, orderAmount, 
        orderTotal, tmpCardPwd, alertLowLimit, 
        overDraft, idleDays, upLimit
        );
    
    ret = CallExe(exePath, params, timeout);

    // 读取生成的文件
    char infoFilePath[MAX_PATH] = {0};
    ret = checkExePath(infoFilePath, txtName);
    if(ret < 0) return ret;

    FILE *pInfoFile = fopen(infoFilePath, "r");
    if(NULL == pInfoFile) return -1;

    char output[8] = {0};
    fgets(output, sizeof(output), pInfoFile);

    fflush(pInfoFile);
    fclose(pInfoFile);
    pInfoFile = NULL;

    // 删除临时生成的文件
    //ret = remove(infoFilePath);

其中CallExe函数实现为：

int CallExe(char exePath[], const char* params, int timeout)
{
    SHELLEXECUTEINFO exe = {0};

    exe.cbSize = sizeof(SHELLEXECUTEINFO);
    exe.fMask = SEE_MASK_NOCLOSEPROCESS;
    exe.hwnd = NULL;
    exe.lpVerb = NULL;
    exe.lpFile = exePath;
    exe.lpParameters = params;
    exe.lpDirectory = NULL;
    //exe.nShow = SW_NORMAL;
    exe.nShow = SW_HIDE;
    exe.hInstApp = NULL;

    BOOL suc = ShellExecuteEx(&exe);

    DWORD m = WaitForSingleObject(exe.hProcess, timeout * 1000);
    
    return (int)m;

}

其中checkExePath函数实现为：

int checkExePath(char exePath[], char* fileSimpleName)
{
    char path[MAX_PATH] = {0};
    if (GetDesktopPath(path)){

        int desktopPathLenth = strlen((const char *)path);

        int i = desktopPathLenth - 1;
        for(; i > 0; i--){
            if(path[i] == '\' || path[i] == '/'){
                break;
            }
        }

        for(int j = 0; j < i; j++){
            exePath[j] = path[j];
        }

        sprintf(exePath, "%s%s", exePath, "\fold1");

        // 检查“teller”文件夹是否存在
        if (!CheckFolderExist(exePath)){
            _mkdir(exePath);
        }

        sprintf(exePath, "%s%s", exePath, "\fold2");

        // 检查“device”文件夹是否存在
        if (!CheckFolderExist(exePath)){
            _mkdir(exePath);
        }

        sprintf(exePath, "%s%s", exePath, "\fold3");

        // 检查“CNG_READER_JZBANK”文件夹是否存在
        if (!CheckFolderExist(exePath)){
            _mkdir(exePath);
        }

        // 用户目录/fold1/fold2/fold3/fileSimpleName
        sprintf(exePath, "%s\%s", exePath, fileSimpleName);
        // 检查exe是否存在


        return 0;
    }

    return -1;
}

GetDesktopPath的函数实现为：

//获取桌面目录的绝对路径
bool GetDesktopPath(char* desktopPath)
{    
    if (SHGetSpecialFolderPath(NULL, desktopPath, CSIDL_DESKTOP, 0)){
        return TRUE;
    }

    return FALSE;
}

CheckFolderExist的函数实现为：

//目录是否存在的检查：
bool  CheckFolderExist(const char* strPath)
{
    WIN32_FIND_DATA  wfd;
    bool rValue = FALSE;
    HANDLE hFind = FindFirstFile(strPath, &wfd);
    if ((hFind != INVALID_HANDLE_VALUE) && (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)){
        rValue = TRUE;   
    }
    FindClose(hFind);
    return rValue;
}