2021-01-08

最新推荐文章于 2023-04-13 10:31:05 发布

原创最新推荐文章于 2023-04-13 10:31:05 发布 · 1k 阅读

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#qt #c++

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QT调用com组件

希望与第三软件集成联动，但第三方在windows环境下只提供com组件，因此需要通过QT调用com组件。采用的QT版本为5.12.10，编译器msvc2017；

1.采用TQ自带工具，基于com组件动态库生成对应的.h 和.cpp文件；

2.用Qtcreator创建一个新工程；

① 将生成的xxxCOM.h与xxxCOM.cpp添加到工程中；

② 工程文件中新增 axcontainer，如下：


QT       += core gui axcontainer

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    xxxCOM.cpp \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    xxxCOM.h \
    mainwindow.h

FORMS += \
    mainwindow.ui

注意：在开始前需要确认com组件的版本是x86还是x64，msvc 64 位的只是识别 64位的 com组件dll，如果是32位com组件，编译器选择msvc32.

3. com组件调用验证

#include "mainwindow.h"
#include <QApplication>
#include "xxxCOM.h"
#include <QAxObject>
#include <QFile>
#include <QTextStream>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    QAxObject *objo = new QAxObject("{33341fd5-7d02-4d01-83d6-9139dfc}");//dumpcpp 生成.h文件中获取
    QString doc = objo->generateDocumentation();
    QFile outFile("D:/debug.html");
    outFile.open(QIODevice::WriteOnly|QIODevice::Append);
    QTextStream ts(&outFile);
    ts<<doc<<endl;
    outFile.close();
    
    return a.exec();
}

注意：QAxObject *objo = new QAxObject("{33341fd5-7d02-4d01-83d6-9139dfc}"); 直接在dumpcpp生成.h文件中获取

// Actual coclasses
class APPCOMLIB_EXPORT plugin : public QAxObject
{
public:
    plugin(QObject *parent = 0)
    : QAxObject(parent)
    {
        setControl(QStringLiteral("{33341fd5-7d02-4d01-83d6-91349dfc}"));
    }

    plugin(Iplugin *iface)
    : QAxObject()
    {
        initializeFrom(iface);
        delete iface;
    }
......

4.调用COM接口测试

#include "mainwindow.h"
#include <QApplication>
#include "xxxCOM.h"
#include <QAxObject>
#include <QFile>
#include <QTextStream>
#include <QDebug>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    QAxObject *objo = new QAxObject("{33341fd5-7d02-4d01-83d6-9139dfc}");
    QString doc = objo->generateDocumentation();
    QFile outFile("D:/debug.html");
    outFile.open(QIODevice::WriteOnly|QIODevice::Append);
    QTextStream ts(&outFile);
    ts<<doc<<endl;
    outFile.close();

    QVariant res;
    QString path = QString::fromLocal8Bit("C:\\Users\\srt\\Desktop\\empty.xxx");
    res = objo->dynamicCall("OpenFile (QString FileName)", path);
    qDebug()<<res.toString()<<endl;
    return a.exec();
}

注意：可用的接口说明可以从第三步打印出来的debug.html文件中获取，也可以从控件开发材料中获取。

参考：

1.https://blog.youkuaiyun.com/qq_15725099/article/details/103353875?utm_medium=distribute.pc_relevant_download.none-task-blog-searchFromBaidu-3.nonecase&depth_1-utm_source=distribute.pc_relevant_download.none-task-blog-searchFromBaidu-3.nonecas

2.https://blog.youkuaiyun.com/xundeng/article/details/103659822?utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~aggregatepage~first_rank_v2~rank_aggregation-1-103659822.pc_agg_rank_aggregation&utm_term=qt%E4%BD%BF%E7%94%A8com%E7%BB%84%E4%BB%B6&spm=1000.2123.3001.4430

3.https://blog.youkuaiyun.com/madlas/article/details/80693866

4.https://www.cnblogs.com/warmSnowFY/p/10602590.html