QXlsx读写Excel表格

Posted 2022-01-28 Leslie X徐

QXlsx读写Excel表格

1.下载qtxlsxwriter 下载链接

2.将src文件夹下的xlsx放到你的项目中

3.项目文件.pro中添加 include(../xlsx/qtxlsx.pri)

4.qtxlsx.pri中添加DEFINES += XLSX_NO_LIB

创建读取xlsx示例：

void MainWindow::on_pushButtoncreate_clicked()

    QXlsx::Document xlsx;
    xlsx.write("A1","Hello Qt1!");
    xlsx.write("A2","Hello Qt2!");
    xlsx.write("A3","Hello Qt3!");
    xlsx.write("A4","Hello Qt4!");
    xlsx.write("A5","Hello Qt5!");
    xlsx.saveAs("Test.xlsx");



void MainWindow::on_pushButton_read_clicked()

    QXlsx::Document xlsx("Test.xlsx");
    xlsx.selectSheet(xlsx.sheetNames()[0]);
    QXlsx::CellRange range = xlsx.dimension();

    for(int i=1; i <= range.rowCount(); ++i)
        if(xlsx.cellAt(i,1)) //若单元格没有内容返回空指针，忽略容易崩溃
        ui->plainTextEdit->appendPlainText(xlsx.cellAt(i,1)->value().toString());
    

示例

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)

    ui->setupUi(this);

    _tableView = new QTableView(this);
    _model = new QStandardItemModel(this);
    _tableView->setModel(_model);
    ui->widget_tableview->layout()->addWidget(_tableView);


void MainWindow::on_pushButton_read_clicked()

    xlsxToTable(_tableView);
     //显示
     _tableView->show();


void MainWindow::on_pushButtoncreate_clicked()

    tableToXlsx(_tableView);


//表格转table
void MainWindow::xlsxToTable(QTableView* table)

    QStandardItemModel* model = static_cast<QStandardItemModel*>(table->model());

    //获取表格，选择表单，获取大小
    QXlsx::Document xlsx(QFileDialog::getOpenFileName(this,"select excel","","*.xlsx"));
    xlsx.selectSheet(xlsx.sheetNames().at(0));
    QXlsx::CellRange range = xlsx.dimension();

    //设置model大小
    model->setColumnCount(range.columnCount());
    model->setRowCount(range.rowCount()-1); //去掉表头一行

    //插入表头
    for(int i=0; i< model->columnCount(); ++i)
        if(xlsx.cellAt(1,i+1))
            model->setHeaderData(i,Qt::Horizontal,xlsx.cellAt(1,i+1)->value().toString());

    //插入内容
    for(int row=0; row< model->rowCount(); ++row)
        for(int col=0; col< model->columnCount(); ++col)
            if(xlsx.cellAt(row+2,col+1))
                model->setData(model->index(row,col),xlsx.cellAt(row+2,col+1)->value().toString());

    //合并单元格
    QList<QXlsx::CellRange> mergedCells =  xlsx.currentWorksheet()->mergedCells();
    for(auto cell : mergedCells)
        table->setSpan(cell.firstRow()-2,cell.firstColumn()-1,cell.rowCount(),cell.columnCount());
    



//table转表格
void MainWindow::tableToXlsx(QTableView *table)

    QStandardItemModel* model = static_cast<QStandardItemModel*>(table->model());

    QXlsx::Document xlsx;

    //写入表头
    for(int i=0; i< model->columnCount(); ++i)
        xlsx.write(QString('A'+i)+"1",model->headerData(i,Qt::Horizontal));
    //写入内容
    for(int row=0; row< model->rowCount(); ++row)
        for(int col=0; col< model->columnCount(); ++col)
            xlsx.write(QString('A'+col)+QString::number(row+2),model->data(model->index(row,col)));

    //保存
    xlsx.saveAs(QFileDialog::getSaveFileName(this,"select excel","","*.xlsx"));

添加读取不同表单

void MainWindow::on_comboBox_sheet_activated(int index)

    if(_model->rowCount()>0)_model->clear();
    changeSheet(_tableView,_xlsx,index);



void MainWindow::xlsxToTable(QTableView* table)

    //获取表格，选择表单，获取大小
    if(_xlsx)delete _xlsx;
    _xlsx = new QXlsx::Document(QFileDialog::getOpenFileName(this,"select excel","","*.xlsx"));

    QStringList sheets = _xlsx->sheetNames();
    for(auto sheet:sheets)
    ui->comboBox_sheet->addItem(sheet);

    changeSheet(_tableView,_xlsx);


void MainWindow::changeSheet(QTableView* table , QXlsx::Document* xlsx , int id)

    QStandardItemModel* model = static_cast<QStandardItemModel*>(table->model());

    xlsx->selectSheet(xlsx->sheetNames().at(id));
    QXlsx::CellRange range = xlsx->dimension();

    //设置model大小
    model->setColumnCount(range.columnCount());
    model->setRowCount(range.rowCount()-1); //去掉表头一行

    //插入表头
    for(int i=0; i< model->columnCount(); ++i)
        if(xlsx->cellAt(1,i+1))
            model->setHeaderData(i,Qt::Horizontal,xlsx->cellAt(1,i+1)->value().toString());

    //插入内容
    for(int row=0; row< model->rowCount(); ++row)
        for(int col=0; col< model->columnCount(); ++col)
            if(xlsx->cellAt(row+2,col+1))
                model->setData(model->index(row,col),xlsx->cellAt(row+2,col+1)->value().toString());

    //合并单元格
    QList<QXlsx::CellRange> mergedCells =  xlsx->currentWorksheet()->mergedCells();
    for(auto cell : mergedCells)
        table->setSpan(cell.firstRow()-2,cell.firstColumn()-1,cell.rowCount(),cell.columnCount());
    

载入时解除合并单元格

//查找合并单元格
    QList<QXlsx::CellRange> mergedCells =  xlsx->currentWorksheet()->mergedCells();
    //插入内容,拆分合并单元格
    for(int row=0; row< model->rowCount(); ++row)
        for(int col=0; col< model->columnCount(); ++col)
            if(xlsx->cellAt(row+2,col+1))
                bool contain =false;
                if(!mergedCells.isEmpty())
                    for(auto cell : mergedCells)
                        if( (row+2 >= cell.firstRow() && row+2 <= cell.lastRow()) &&
                            (col+1 >= cell.firstColumn() && col+1 <= cell.lastColumn())  )
                            model->setData(model->index(row,col),xlsx->cellAt(cell.firstRow(),cell.firstColumn())->value().toString());
                            contain=true;
                            break;
                        
                    
                
                if(!contain)model->setData(model->index(row,col),xlsx->cellAt(row+2,col+1)->value().toString());