This article introduces in detail the various operations of the QAxWidget control, such as: creating a new interface , usage examples , displaying web pages , displaying pdf , displaying Off , and source filesDetailed descriptionOther articles and other operations.
ActiveX control is a reusable binary component used to provide specific functions and services on the Windows operating system. The following are examples of some common ActiveX controls: 1. Internet Explorer Web Browser Control: Used to embed and display a web browser in an application. 2. Microsoft Office components (such as Word, Excel, PowerPoint): used to embed and operate Office documents in applications. 3. Windows Media Player Control: Used to embed and play audio and video files in applications. 4. Adobe Flash Player Control: Used to embed and play Flash animations and videos in applications. 5. Crystal Reports Viewer Control: used to display and print Crystal Reports reports in applications 6. Windows Common Controls (such as TreeView, ListView, ProgressBar): used to create common user interface controls in applications. 7. Microsoft DataGrid Control: used to display and edit data tables in the application. 8. Microsoft Windows Image Acquisition Control: used to acquire and process images in applications. 9. Microsoft Windows Media Encoder Control: For audio and video encoding in applications.
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QT QAxWidget control usage detailed directory
1 Create a new interface
2 Usage examples
// ui->axWidget->setControl("{8856F961-340A-11D0-A96B-00C04FD705A2}");
// ui->axWidget->dynamicCall("MethodName", "123", "hello");
// QVariant value = ui->axWidget->dynamicCall("PropertyName");3 Display web page
ui->axWidget->setControl(QString::fromUtf8("{8856F961-340A-11D0-A96B-00C04FD705A2}"));//注册组件ID
ui->axWidget->setProperty("DisplayAlerts",false);//不显示警告信息
ui->axWidget->setProperty("DisplayScrollBars",true);//不显示滚动条
QString webstr=QString("www.baidu.com");//设置要打开的网页
ui->axWidget->dynamicCall("Navigate(const QString&)",webstr);//显示网页4 show pdf
// QString msFilePath;
// msFilePath = "D:/t.pdf";
// mpAxWidgetPdf = new QAxWidget("AcroPDF.PDF", this->ui->widget);//Excel.Application //Adobe Acrobat Reader
// mpAxWidgetOff = new QAxWidget("Word.Application", this->ui->widget_2);
// // 创建一个QAxWidget对象，并设置其控制为Excel.Application
// // 注释中提到不显示窗体，设置DisplayAlerts为false
// mpAxWidgetPdf->dynamicCall("SetVisible (bool Visible)", "false");
// mpAxWidgetPdf->setProperty("DisplayAlerts", true);
// auto rect = ui->widget->geometry();
// mpAxWidgetPdf->setGeometry(rect);
// mpAxWidgetPdf->setControl(msFilePath);
// mpAxWidgetPdf->show();5 DisplayOff
// // 创建一个QAxWidget对象，并设置其控制为Word.Application
// // 注释中提到不显示窗体，设置DisplayAlerts为true
// mpAxWidgetOff->dynamicCall("SetVisible (bool Visible)", "false");
// mpAxWidgetOff->setProperty("DisplayAlerts", true);
// rect = this->ui->widget_2->geometry();
// mpAxWidgetOff->setGeometry(rect);
// mpAxWidgetOff->setControl(msFilePath);
// mpAxWidgetOff->show();6 source files
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QAxWidget>
//加入GBK申明，否则中文乱码 全局使用GBK文件操作因为有中文所以使用
#pragma execution_character_set("utf-8")
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
private:
Ui::MainWindow *ui;
QString Title;
QString Version;
QString BlogText;
QAxWidget* mpAxWidgetPdf;
QAxWidget* mpAxWidgetOff;
};
#endif // MAINWINDOW_H
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <QVariant>
//#include "office.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
Title = "QT QAxWidget CSDN 双子座断点 ";
Version = "V 1.0 ";
BlogText = "https://blog.csdn.net/qq_37529913?type=lately/";
setWindowTitle(Title + Version + BlogText);
// ui->axWidget->setControl("{8856F961-340A-11D0-A96B-00C04FD705A2}");
// ui->axWidget->dynamicCall("MethodName", "123", "hello");
// QVariant value = ui->axWidget->dynamicCall("PropertyName");
// qDebug() << value;
ui->axWidget->setControl(QString::fromUtf8("{8856F961-340A-11D0-A96B-00C04FD705A2}"));//注册组件ID
ui->axWidget->setProperty("DisplayAlerts",false);//不显示警告信息
ui->axWidget->setProperty("DisplayScrollBars",true);//不显示滚动条
QString webstr=QString("www.baidu.com");//设置要打开的网页
ui->axWidget->dynamicCall("Navigate(const QString&)",webstr);//显示网页
// QString msFilePath;
// msFilePath = "D:/t.pdf";
// mpAxWidgetPdf = new QAxWidget("AcroPDF.PDF", this->ui->widget);//Excel.Application //Adobe Acrobat Reader
// mpAxWidgetOff = new QAxWidget("Word.Application", this->ui->widget_2);
// // 创建一个QAxWidget对象，并设置其控制为Excel.Application
// // 注释中提到不显示窗体，设置DisplayAlerts为false
// mpAxWidgetPdf->dynamicCall("SetVisible (bool Visible)", "false");
// mpAxWidgetPdf->setProperty("DisplayAlerts", true);
// auto rect = ui->widget->geometry();
// mpAxWidgetPdf->setGeometry(rect);
// mpAxWidgetPdf->setControl(msFilePath);
// mpAxWidgetPdf->show();
// // 创建一个QAxWidget对象，并设置其控制为Word.Application
// // 注释中提到不显示窗体，设置DisplayAlerts为true
// mpAxWidgetOff->dynamicCall("SetVisible (bool Visible)", "false");
// mpAxWidgetOff->setProperty("DisplayAlerts", true);
// rect = this->ui->widget_2->geometry();
// mpAxWidgetOff->setGeometry(rect);
// mpAxWidgetOff->setControl(msFilePath);
// mpAxWidgetOff->show();
}
MainWindow::~MainWindow()
{
delete ui;
}
7 Detailed description
Because the blogger did not install the component, it failed. There is no business work involved in this yet, so I did not conduct in-depth research and posted the implementation code for reference.
1. QVariant(Invalid)：这表示QVariant对象的值无效。可能是由于未正确初始化或设置对象的属性导致的。请确保在使用QVariant对象之前正确初始化和设置其值。
2. CoCreateInstance failure (没有注册类)：这表示无法创建指定类的实例。可能是由于未正确注册类或缺少相关的组件导致的。请确保所需的类已正确注册，并且系统中已安装了相关的组件。
3. QAxBase::setControl: requested control AcroPDF.PDF could not be instantiated：这表示无法实例化请求的控件。可能是由于控件未正确安装或未正确注册导致的。请确保所需的控件已正确安装，并且系统中已注册该控件。
4. QAxBase::dynamicCallHelper: Object is not initialized, or initialization failed：这表示对象未初始化或初始化失败。可能是由于对象的初始化过程中出现了错误或问题导致的。请确保在使用对象之前正确初始化对象，并检查初始化过程中是否有任何错误。
要解决这些问题，您可以尝试以下步骤：
1. 确保所需的控件已正确安装并注册。如果您使用的是Adobe Acrobat Reader控件来显示PDF文件，请确保已正确安装Adobe Acrobat Reader，并且系统中已注册该控件。
2. 检查代码中是否正确设置了控件的属性和参数。请确保在使用QAxWidget对象之前正确设置其属性和参数，以确保正确的初始化和实例化。
3. 确保您的应用程序具有足够的权限来访问所需的控件和组件。请检查您的应用程序的权限设置，并确保它具有访问所需控件和组件的权限8 other articles
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