qtablewidget 导出为 excel

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From： http://blog.csdn.net/cool222/article/details/38639647

在 Qt 5.2 中使用 OLE 将 qtablewidget 导出为 excel，效果如下：

只用了一个函数，大家可以把它粘贴到自己的类里使用。

在头文件中请包含以下文件：

#include <QTableWidget>

#include <QFileDialog>

#include <QDesktopServices>

#include <QMessageBox>

#include <QAxObject>

参数说明： 

table: 要导出的  QTableWidget

title: 标题，显示在第一行

void Table2Excel(QTableWidget *table,QString title)
{
    QString fileName = QFileDialog::getSaveFileName(table, "保存",
            QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation),
            "Excel 文件(*.xls *.xlsx)");
    if (fileName!="")
    {
        QAxObject *excel = new QAxObject;
        if (excel->setControl("Excel.Application")) //连接Excel控件
        {
            excel->dynamicCall("SetVisible (bool Visible)","false");//不显示窗体
            excel->setProperty("DisplayAlerts", false);//不显示任何警告信息。如果为true那么在关闭是会出现类似“文件已修改，是否保存”的提示
            QAxObject *workbooks = excel->querySubObject("WorkBooks");//获取工作簿集合
            workbooks->dynamicCall("Add");//新建一个工作簿
            QAxObject *workbook = excel->querySubObject("ActiveWorkBook");//获取当前工作簿
            QAxObject *worksheet = workbook->querySubObject("Worksheets(int)", 1);
            int i,j,colcount=table->columnCount();
            QAxObject *cell,*col;
            //标题行
            cell=worksheet->querySubObject("Cells(int,int)", 1, 1);
            cell->dynamicCall("SetValue(const QString&)", title);
            cell->querySubObject("Font")->setProperty("Size", 18);
            //调整行高
            worksheet->querySubObject("Range(const QString&)", "1:1")->setProperty("RowHeight", 30);
            //合并标题行
            QString cellTitle;
            cellTitle.append("A1:");
            cellTitle.append(QChar(colcount - 1 + 'A'));
            cellTitle.append(QString::number(1));
            QAxObject *range = worksheet->querySubObject("Range(const QString&)", cellTitle);
            range->setProperty("WrapText", true);
            range->setProperty("MergeCells", true);
            range->setProperty("HorizontalAlignment", -4108);//xlCenter
            range->setProperty("VerticalAlignment", -4108);//xlCenter
            //列标题
            for(i=0;i<colcount;i++)
            {
                QString columnName;
                columnName.append(QChar(i  + 'A'));
                columnName.append(":");
                columnName.append(QChar(i + 'A'));
                col = worksheet->querySubObject("Columns(const QString&)", columnName);
                col->setProperty("ColumnWidth", table->columnWidth(i)/6);
                cell=worksheet->querySubObject("Cells(int,int)", 2, i+1);
                columnName=table->horizontalHeaderItem(i)->text();
                cell->dynamicCall("SetValue(const QString&)", columnName);
                cell->querySubObject("Font")->setProperty("Bold", true);
                cell->querySubObject("Interior")->setProperty("Color",QColor(191, 191, 191));
                cell->setProperty("HorizontalAlignment", -4108);//xlCenter
                cell->setProperty("VerticalAlignment", -4108);//xlCenter
            }
            //数据区
            for(i=0;i<table->rowCount();i++){
                for (j=0;j<colcount;j++)
                {
                    worksheet->querySubObject("Cells(int,int)", i+3, j+1)->dynamicCall("SetValue(const QString&)", table->item(i,j)?table->item(i,j)->text():"");
                }
            }
            //画框线
            QString lrange;
            lrange.append("A2:");
            lrange.append(colcount - 1 + 'A');
            lrange.append(QString::number(table->rowCount() + 2));
            range = worksheet->querySubObject("Range(const QString&)", lrange);
            range->querySubObject("Borders")->setProperty("LineStyle", QString::number(1));
            range->querySubObject("Borders")->setProperty("Color", QColor(0, 0, 0));
            //调整数据区行高
            QString rowsName;
            rowsName.append("2:");
            rowsName.append(QString::number(table->rowCount() + 2));
            range = worksheet->querySubObject("Range(const QString&)", rowsName);
            range->setProperty("RowHeight", 20);
            workbook->dynamicCall("SaveAs(const QString&)",QDir::toNativeSeparators(fileName));//保存至fileName
            workbook->dynamicCall("Close()");//关闭工作簿
            excel->dynamicCall("Quit()");//关闭excel
            delete excel;
            excel=NULL;
            if (QMessageBox::question(NULL,"完成","文件已经导出，是否现在打开？",QMessageBox::Yes|QMessageBox::No)==QMessageBox::Yes)
            {
                QDesktopServices::openUrl(QUrl("file:///" + QDir::toNativeSeparators(fileName)));
            }
        }
        else
        {
            QMessageBox::warning(NULL,"错误","未能创建 Excel 对象，请安装 Microsoft Excel。",QMessageBox::Apply);
        }
    }
}

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