Reading multiple files with QFile

Question

I want to read multiple files. I get en error in QFile because it reads only one file at once.

• How can I solve this problem?
• And how can I iterate my files and use them.

QStringList fileNames;
fileNames = QFileDialog::getOpenFileNames(this,
  tr("choose"),
  "up.sakla",
  tr("choosen(*.up)"));

if (fileNames.isEmpty())
  return;

QFile file(fileNames);
file.open(QIODevice::ReadOnly);
QDataStream in ( & file);
QString str;
qint32 a; in >> str >> a;

Answer 1

I understand that you have some files within a folder and you would like to read a list of files (the ones that you selected through the QFileDialog)

Here is the complete code:

#include <QApplication>
#include <QFileDialog>
#include <QDebug>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
   
    QStringList fileNames;



    fileNames = QFileDialog::getOpenFileNames(nullptr, "choose", "up.sakla", "choosen(*.up)");

    for (auto xfile : fileNames)
    {
        QFile file (xfile);
        file.open(QIODevice::ReadOnly);
        QTextStream in(&file);
        QString str;
        while (!in.atEnd())
        {
           //read all the file content as a text
           str = in.readAll();
           qDebug() << str;
        }


    }

    return app.exec();
}

If the contents of each file is the following:

• file 1 content

File1 11

• file 2 content

File1 12

• file 3 content

File1 13

The output of the program would be as follows:

"File3 13\n \n"
"File1 11\n \n"
"File2 12\n \n"