Qt - 如何将我的QTableView保存为Excel文件？

Question

请问有人能帮我，如何将我的 QTableView 保存为 Excel 文件。我有一个 QTableView 和一个 QPushButton（保存按钮）。如果我在 QtableView 中输入值，并且 点击保存按钮时，QTableView 的项目应保存为 Excel 文件。请帮帮我。谢谢..

- New Moon

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你尝试过什么？你研究过Excel文件格式并决定使用哪种吗？ - user362638

抱歉，我对Qt还不熟悉。所以有点困惑哪个是最好的选择。您能否给我建议？ - New Moon

Answer 1

请看这个帖子如何将QTableView数据导出到Microsoft Excel文件的方法。我通过谷歌搜索“QTableView保存”得到了这个链接。要解决那里的问题，您需要启用ODBC的Qt，这不是默认设置。

您还可以学习详细的文档，其中包括一个地址簿示例，其中包含一个writeToFile函数。您可以从那里开始，并搜索有关CSV格式的信息。

- hmuelner

Answer 2

这个链接对我有效： http://www.qtcn.org/bbs/simple/?t47265.html 1-在.pro文件中还应该使用以下代码。 QT += sql 2-在想要导出到Excel的文件中使用#include "exportexcelobject.h"。

- mjyazdani

Answer 3

请看代码示例：

ExcelExportHelper.h

#ifndef EXCELHELPER_H
#define EXCELHELPER_H

#include <ActiveQt/qaxobject.h>
#include <ActiveQt/qaxbase.h>
#include <QString>

//Expected in .pro file: QT += axcontainer
//Application must be of UI type for ActiveX work.
class ExcelExportHelper
{
public:
    ExcelExportHelper(const ExcelExportHelper& other) = delete;
    ExcelExportHelper& operator=(const ExcelExportHelper& other) = delete;

    ExcelExportHelper(bool closeExcelOnExit = false);
    void SetCellValue(int lineIndex, int columnIndex, const QString& value);
    void SaveAs(const QString& fileName);

    ~ExcelExportHelper();

private:
    QAxObject* m_excelApplication;
    QAxObject* m_workbooks;
    QAxObject* m_workbook;
    QAxObject* m_sheets;
    QAxObject* m_sheet;
    bool m_closeExcelOnExit;
};

#endif // EXCELHELPER_H

ExcelExportHelper.cpp

#include <ActiveQt/qaxobject.h>
#include <ActiveQt/qaxbase.h>

#include <QString>
#include <QFile>
#include <stdexcept>

using namespace std;

#include "ExcelExportHelper.h"

ExcelExportHelper::ExcelExportHelper(bool closeExcelOnExit)
{
    m_closeExcelOnExit = closeExcelOnExit;
    m_excelApplication = nullptr;
    m_sheet = nullptr;
    m_sheets = nullptr;
    m_workbook = nullptr;
    m_workbooks = nullptr;
    m_excelApplication = nullptr;

    m_excelApplication = new QAxObject( "Excel.Application", 0 );//{00024500-0000-0000-C000-000000000046}

    if (m_excelApplication == nullptr)
        throw invalid_argument("Failed to initialize interop with Excel (probably Excel is not installed)");

    m_excelApplication->dynamicCall( "SetVisible(bool)", false ); // hide excel
    m_excelApplication->setProperty( "DisplayAlerts", 0); // disable alerts

    m_workbooks = m_excelApplication->querySubObject( "Workbooks" );
    m_workbook = m_workbooks->querySubObject( "Add" );
    m_sheets = m_workbook->querySubObject( "Worksheets" );
    m_sheet = m_sheets->querySubObject( "Add" );
}

void ExcelExportHelper::SetCellValue(int lineIndex, int columnIndex, const QString& value)
{
    QAxObject *cell = m_sheet->querySubObject("Cells(int,int)", lineIndex, columnIndex);
    cell->setProperty("Value",value);
    delete cell;
}

void ExcelExportHelper::SaveAs(const QString& fileName)
{
    if (fileName == "")
        throw invalid_argument("'fileName' is empty!");
    if (fileName.contains("/"))
        throw invalid_argument("'/' character in 'fileName' is not supported by excel!");

    if (QFile::exists(fileName))
    {
        if (!QFile::remove(fileName))
        {
            throw new exception(QString("Failed to remove file '%1'").arg(fileName).toStdString().c_str());
        }
    }

    m_workbook->dynamicCall("SaveAs (const QString&)", fileName);
}

ExcelExportHelper::~ExcelExportHelper()
{
    if (m_excelApplication != nullptr)
    {
        if (!m_closeExcelOnExit)
        {
            m_excelApplication->setProperty("DisplayAlerts", 1);
            m_excelApplication->dynamicCall("SetVisible(bool)", true );
        }

        if (m_workbook != nullptr && m_closeExcelOnExit)
        {
            m_workbook->dynamicCall("Close (Boolean)", true);
            m_excelApplication->dynamicCall("Quit (void)");
        }
    }

    delete m_sheet;
    delete m_sheets;
    delete m_workbook;
    delete m_workbooks;
    delete m_excelApplication;
}

使用方法：

try
{
    const QString fileName = "g:\\temp\\kaka2.xlsx";

    ExcelExportHelper helper;

    helper.SetCellValue(1,1,"Test-11");
    helper.SetCellValue(1,2,"Test-12");

    helper.SaveAs(fileName);
}
catch (const exception& e)
{
    QMessageBox::critical(this, "Error - Demo", e.what());
}

- Siarhei Kuchuk