QT操作Excel

在具体操作之前，我们先了解一下excel的层次结构，如图所示，Application对象–>Workbook对象–>Worksheet对象–>Range对象。
1个excel有一个Application对象，1个Application对象有多个workbook对象组成，这些workbook对象由workbooks对象统一管理，workbook对象下包含若干个worksheet，这些worksheet对象由worksheets对象统一管理，worksheet下面的range对象，对应这worksheet里面的表格单元了。
2.具体的操作流程如下：

QAxWidget excel(“Excel.Application”);

1) 显示当前窗口：
excel.setProperty(“Visible”, true);
2) 更改 Excel 标题栏：
excel.setProperty(“Caption”, “Invoke Microsoft Excel”);
3) 添加新工作簿：
QAxObject * workbooks = excel.querySubObject(“WorkBooks”);
workbooks->dynamicCall(“Add”);
4) 打开已存在的工作簿：
workbooks->dynamicCall(“Open (const QString&)”, QString(“c:/test.xls”));
5) 获取活动工作簿：
QAxObject * workbook = excel.querySubObject(“ActiveWorkBook”);
6) 获取所有的工作表：
QAxObject * worksheets = workbook->querySubObject(“WorkSheets”);
7) 获取工作表数量：
int intCount = worksheets->property(“Count”).toInt();
8) 获取第一个工作表：
QAxObject * worksheet = workbook->querySubObject(“Worksheets(int)”, 1);
9) 获取cell的值：
QAxObject * range = worksheet->querySubObject(“Cells(int,int)”, 1, 1 );

3.新建

void ExcelHelper::NewExcel(const QString &fileName)
{

	QFile file(fileName);
	if (file.exists()) {
        m_pWorkBook = m_pWorkBooks->querySubObject("Open(const QString &)", fileName);
	}
	else {
		m_pWorkBooks->dynamicCall("Add");
        m_pWorkBook = m_pApplication->querySubObject("ActiveWorkBook");
        m_pWorkBook->dynamicCall("SaveAs (const QString&)", fileName);
	}

    m_pWorkBook->dynamicCall("Close (Boolean)", false);
    m_pApplication->dynamicCall("Quit (void)");
}

4.打开

void ExcelHelper::OpenExcel(const QString &fileName)
{
    m_pWorkBooks->dynamicCall("Open (const QString&)", fileName);
    QAxObject * workbook = m_pApplication->querySubObject("ActiveWorkBook");
    QAxObject * worksheets = workbook->querySubObject("WorkSheets");
    int intCount = worksheets->property("Count").toInt();
    QAxObject * worksheet = workbook->querySubObject("Worksheets(int)", 1);
    QAxObject * usedrange = worksheet->querySubObject("UsedRange");
    QAxObject * rows = usedrange->querySubObject("Rows");
    QAxObject * columns = usedrange->querySubObject("Columns");
    int intRowStart = usedrange->property("Row").toInt();
    int intColStart = usedrange->property("Column").toInt();
    int intCols = columns->property("Count").toInt();
    int intRows = rows->property("Count").toInt();
    for (int i = intRowStart; i < intRowStart + intRows; i++)
    {
        for (int j = intColStart; j <= intColStart + intCols; j++)
        {
            QAxObject * range = worksheet->querySubObject("Cells(int,int)", i, j );
            qDebug() << i << j << range->property("Value");
        }
    }
    m_pApplication->setProperty("DisplayAlerts", 0);
    workbook->dynamicCall("SaveAs (const QString&)", QDir::toNativeSeparators("c:/xlsbyqt.xls"));
    m_pApplication->setProperty("DisplayAlerts", 1);
    workbook->dynamicCall("Close (Boolean)", false);
    m_pApplication->dynamicCall("Quit (void)");
}

5.使用

pExcelHelper->OpenExcel(QString("D:/test.xlsx"));
pExcelHelper->NewExcel(QString("D:\\test1.xlsx"));

6.注意新建和打开时的路径写法