一、环境介绍
操作系统: win10 64位
QT版本: 5.12.6
Visual Studio IDE 版本: 2017
示例工程下载链接: https://download.csdn.net/download/xiaolong1126626497/14919797
二、创建COM组件
为了方便测试，我这里使用QT来创建COM组件，再由QT自己调用。 理论上任何语言生成的COM组件调用流程应该都是一样的。
QT创建COM的方法看这里：
(1)VS2017下使用QT生成COM组件: https://blog.csdn.net/xiaolong1126626497/article/details/112556866
(2) QtCreate下生成COM组件: https://blog.csdn.net/xiaolong1126626497/article/details/112550412
当前创建COM组件的工程我是使用VS2017+QT插件的方式生成的。
为了方便注册可以在目录下写个脚本:
安装代码:
cd /d %~dp0 @regsvr32 ActiveQtServer_vs2017.dll @exit
卸载代码:
cd /d %~dp0 @regsvr32 /u ActiveQtServer_vs2017.dll @exit
三、QtCreate里创建工程调用COM组件
3.2 编写测试代码
#include <QApplication> #include <QAxObject> #include <QDebug> #include <QFile> int main(int argc, char *argv[]) { QApplication a(argc, argv); QAxObject *mpAxObj; mpAxObj = new QAxObject(); //指定调用的COM组件类ID,这个ID要填正确. mpAxObj->setControl("{fe8bb3a1-998e-4318-b4ee-4263a1cc06a2}"); //导出支持调用的函数接口 QString DOC = mpAxObj->generateDocumentation(); QFile outFile("com_function.html"); outFile.open(QIODevice ::ReadWrite|QIODevice ::Text); QTextStream TS(&outFile); TS<<DOC<<endl; //调用COM组件函数接口: 获取版本号 QString result = mpAxObj->dynamicCall("VersionNumber()").toString(); qDebug()<<"VersionNumber:"<<result; //调用COM组件函数接口: 求和计算 QVariantList params ={100,200}; int sum_val = mpAxObj->dynamicCall("sum(int, int)", params).toInt(); qDebug()<<"sum:"<<sum_val; //调用COM组件函数接口: 显示界面 mpAxObj->dynamicCall("show()"); return a.exec(); }
3.3 工程pro文件
QT += core gui QT += axcontainer greaterThan(QT_MAJOR_VERSION, 4): QT += widgets CONFIG += c++11 # The following define makes your compiler emit warnings if you use # any Qt feature that has been marked deprecated (the exact warnings # depend on your compiler). Please consult the documentation of the # deprecated API in order to know how to port your code away from it. DEFINES += QT_DEPRECATED_WARNINGS # You can also make your code fail to compile if it uses deprecated APIs. # In order to do so, uncomment the following line. # You can also select to disable deprecated APIs only up to a certain version of Qt. #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 SOURCES += \ main.cpp HEADERS += FORMS += # Default rules for deployment. qnx: target.path = /tmp/$${TARGET}/bin else: unix:!android: target.path = /opt/$${TARGET}/bin !isEmpty(target.path): INSTALLS += target
3.4 运行测试
说明: 如何调用运行失败,记得把COM组件dll依赖的所有文件拷贝到现在测试程序运行的目录下，防止找不到依赖文件运行失败。
如果想将带界面的COM控件集成到当前QT工程里，可以参考这篇文章:
https://blog.csdn.net/xiaolong1126626497/article/details/113127300
