'QT: Finding and replacing text in a file

I need to find and replace some text in the text file. I've googled and found out that easiest way is to read all data from file to QStringList, find and replace exact line with text and then write all data back to my file. Is it the shortest way? Can you provide some example, please. UPD1 my solution is:

QString autorun;
QStringList listAuto;
QFile fileAutorun("./autorun.sh");
if(fileAutorun.open(QFile::ReadWrite  |QFile::Text))
{
    while(!fileAutorun.atEnd()) 
    {
        autorun += fileAutorun.readLine();
    }
    listAuto = autorun.split("\n");
    int indexAPP = listAuto.indexOf(QRegExp("*APPLICATION*",Qt::CaseSensitive,QRegExp::Wildcard)); //searching for string with *APPLICATION* wildcard
    listAuto[indexAPP] = *(app); //replacing string on QString* app
    autorun = ""; 
    autorun = listAuto.join("\n"); // from QStringList to QString
    fileAutorun.seek(0);
    QTextStream out(&fileAutorun);
    out << autorun; //writing to the same file
    fileAutorun.close();
}
else
{
    qDebug() << "cannot read the file!";
}
c++qttext-files


Solution 1:[1]

To complete the accepted answer, here is a tested code. It is needed to use QByteArray instead of QString.

QFile file(fileName);
file.open(QIODevice::ReadWrite);
QByteArray text = file.readAll();
text.replace(QByteArray("ou"), QByteArray("o"));
file.seek(0);
file.write(text);
file.close();

Solution 2:[2]

I've being used regexp with batch-file and sed.exe (from gnuWin32, http://gnuwin32.sourceforge.net/). Its good enough for replace one-single text. btw, there is not a simple regexp syntax there. let me know If you want to get some example of script.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Joachimhgg
Solution 2 std.approach

Related Questions