如何将 QTable 导出到 .csv？

Question

如何将值从 QTableWidget 导出到 .csv 文件或 Excel 文件？

程序应该从 PLC 收集三个变量的值。这个PLC是我公司的，有采集功能。

正在将项目插入 QTableWidget.cpp:

void MainWindow::on_pushInsert_clicked()
{
/*
the program already is connected to plc, 
so I just have to choose the address inside of the plc. 
*/
    WORD wAddress = 50001;
    WORD value1 = 0;
    WORD value2 = 0;
    WORD value3 = 0;
    CollectVariables(wAddress,wValue);
    int ID = 0;
    string Name = "";
    int Age = 0;
    QTableWidget *table = ui->tableWidget;
    for(i=0;i<10; i++) {
        //id
        CollectVariables(wAddress+i, value1);
        table->setItem(i, 0, new QTableWidgetItem(value1));

        //name
        CollectVariables(wAddress+10+i, value2);
        table->setItem(i, 1, new QTableWidgetItem(value2));

        //age
        CollectVariables(wAddress+20+i, value3);
        table->setItem(i, 2, new QTableWidgetItem(value3));
        tabela->selectRow(i);
    }
}

Answer 1

我以前将 QTableWidget“导出”到 .csv 文件（我无法导出 excel）的方法是将每个 space 的值存储在 table 到数组，同时将项目插入到 table.

QFile 用于创建 .csv 文件，QTextStream 用于在其上插入值。

为了改进代码，我创建了一个按钮，指向 select 保存此 .csv 文件的目录。

Select 目录.cpp:

void MainWindow::on_pushSelectDir_clicked()
{
    QFileDialog directory;
    ui->lineEditDir->setText(directory.getSaveFileName(this,"Choose an directory"));
    dir_name = ui->lineEditDir->text();
}

创建 .csv 文件 .cpp:

void MainWindow::on_pushExportCSV_clicked()
{
    QFile data(dir_name+".csv");
    if (data.open(QFile::WriteOnly | QIODevice::Append)) {
     }
    QTextStream output(&data);
    output <<"ID"<<","<<"Name"<<","<<"Age"<< '\n';
    for(i=0;i<10; i++) {   
        output << ID[i] <<","<< Name[i] <<","<< Age[i] << '\n';
    }
    data.close();
}

如何将 QTable 导出到 .csv？

How to export QTable to .csv?

c++

csv

qt

qtablewidget

export-to-csv