Missng last lines when read file wth readLine()

[aguayro]

Hi, i'm trying to read a entire file:

QFile lista(path);
    if(!lista.open(QFile::ReadOnly))
    {
        QMessageBox msgBox;
        msgBox.setText(tr("Could not open file.(2)"));
        msgBox.setStandardButtons(QMessageBox::Ok);
        msgBox.exec();
    } else {
    QTextStream strim(&lista);
 
    while(!lista.atEnd()) {
        qDebug() << strim.readLine();
     }
    }
    lista.close();

QFile lista(path);
    if(!lista.open(QFile::ReadOnly))
    {
        QMessageBox msgBox;
        msgBox.setText(tr("Could not open file.(2)"));
        msgBox.setStandardButtons(QMessageBox::Ok);
        msgBox.exec();
    } else {
    QTextStream strim(&lista);

    while(!lista.atEnd()) {
        qDebug() << strim.readLine();
     }
    }
    lista.close();

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But i can't read the last lines, it never read the last lines of files, sometimes 50, sometimes 100,.....

What can be wrong??

[ChrisW67]

What can be wrong??

Almost anything:

• You could be reading a file other than the one you think you are.
• You could be reading a file that is being appended to by another process, so by the time you check the file is has more content.
• You could be reading a binary file where the concept of "line" in meaningless.
• You could could be reading a file with old-style Mac OS line endings expecting these to be treated as line endings.
• You could just be mistaken about what is actually read.

[Rhayader]

from QTextStream documentation:

Since the text stream uses a buffer, you should not read from the stream using the implementation of a superclass. For instance, if you have a QFile and read from it directly using QFile::readLine() instead of using the stream, the text stream's internal position will be out of sync with the file's position.

So maybe you should use " while (!strim.atEnd()) " to check the end of file

[aguayro]

thanks, its working fine now