Load CSV file into QTableWidget

[thecml]

Hi all.

I've been using Qt for a few days now and having trouble populating a QTableWidget with data from an CSV file. My code is as follows:

Input text file:

Test1
Heyheyhey25

Test1
Heyheyhey25

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Code for inserting the file into QTableWidget:

{
    QFile file("filename");
 
  //  QString fileName = QFileDialog::getOpenFileName(this, ("Open File"), "/home", ("csv File(*.csv)"));
//    QFile file(fileName);
 
    QString data;
    QStringList rowOfData;
    QStringList rowData;
    data.clear();
    rowOfData.clear();
    rowData.clear();
 
    if (file.open(QFile::ReadOnly))
    {
        data = file.readAll();
        rowOfData = data.split("\n");
        file.close();
    }
 
   qDebug()<<rowOfData;
 
    for (int x = 0; x < rowOfData.size(); x++)
    {
        rowData = rowOfData.at(x).split(";");
        qDebug()<<rowData;
        for (int y = 0; y < rowData.size(); y++)
        {
        ui->tableWidgetScenarios->item(x,y)->setText(rowData[y]);
        }
    }
}

{
    QFile file("filename");

  //  QString fileName = QFileDialog::getOpenFileName(this, ("Open File"), "/home", ("csv File(*.csv)"));
//    QFile file(fileName);

    QString data;
    QStringList rowOfData;
    QStringList rowData;
    data.clear();
    rowOfData.clear();
    rowData.clear();

    if (file.open(QFile::ReadOnly))
    {
        data = file.readAll();
        rowOfData = data.split("\n");
        file.close();
    }

   qDebug()<<rowOfData;

    for (int x = 0; x < rowOfData.size(); x++)
    {
        rowData = rowOfData.at(x).split(";");
        qDebug()<<rowData;
        for (int y = 0; y < rowData.size(); y++)
        {
        ui->tableWidgetScenarios->item(x,y)->setText(rowData[y]);
        }
    }
}

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It crashes whenever I try to insert my data into the tablewidget. Here's the debugger output and error message:

Debugging starts
("Test1", "Heyheyhey25")
("Test1")
 
qtablewidget.h:181: error: Exception at 0x646e55e3, code: 0xc0000005: read access violation at: 0x0, flags=0x0 (first chance)

Debugging starts
("Test1", "Heyheyhey25")
("Test1")

qtablewidget.h:181: error: Exception at 0x646e55e3, code: 0xc0000005: read access violation at: 0x0, flags=0x0 (first chance)

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I've tried with multiple files, same result. Do I need to initialize the widget in some way or what am I doing wrong?

Thanks in advance, regards.

[anda_skoa]

for (int x = 0; x < rowOfData.size(); x++)
    {
        rowData = rowOfData.at(x).split(";");
        qDebug()<<rowData;
        for (int y = 0; y < rowData.size(); y++)
        {
        ui->tableWidgetScenarios->item(x,y)->setText(rowData[y]);
        }
    }
}

for (int x = 0; x < rowOfData.size(); x++)
    {
        rowData = rowOfData.at(x).split(";");
        qDebug()<<rowData;
        for (int y = 0; y < rowData.size(); y++)
        {
        ui->tableWidgetScenarios->item(x,y)->setText(rowData[y]);
        }
    }
}

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It crashes whenever I try to insert my data into the tablewidget. Here's the debugger output and error message:

Assuming you don't have code elsewhere that creates table widget items, then

ui->tableWidgetScenarios->item(x,y)->setText(rowData[y]);

ui->tableWidgetScenarios->item(x,y)->setText(rowData[y]);

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tries to access an item that does not exist. I.e. item(x, y) returns 0 and you are then calling a method on a null pointer.

See QTableWidget::setItem().

Cheers,
_