Problem with finding pattern using QFile[SOLVED]

[Roma_12]

Hello everyone!

I have faced with some trouble while using next program:

QFile file1("/Path/To/File/input.txt");
file1.open(QIODevice::ReadOnly);
QString s = file1.readAll();

if (!file1.isOpen()) {
    qDebug() << "Not";
    return -1;
}

file1.close();


QRegExp reg(QString("%1").arg("Слово"));

QLabel l;
l.setText(reg.lastIndexIn(s));
l.show();

I am trying to find word in my file input.txt. There is only one word "Слово". But every time I getting result -1.

But in next program:

QString s = QByteArray("Слово");

QRegExp reg(QString("%1").arg("Слово"));

QLabel l;
l.setText(reg.lastIndexIn(s));
l.show();

The result is 0.

Why the results are different? And what I need to do to get correct answer in first program?
Thank in advance.

[SGaist]

Hi and welcome to devnet,

Why not just use QString's contains method ?

[Roma_12]

@SGaist Hello and thank you for answer.
Thank for this method, but it doesn't help me with my problem.

[SGaist]

What's the encoding of input.txt ?

By the way QRegExp rx("Слово"); is enough to create your QRegExp.

On a side note, if you are using Qt 5, QRegularExpression is recommended.

[Roma_12]

@SGaist The Unicode encoding.
So I need to use QTextStream to solve my problem.
Thank for your help!

[SGaist]

You're welcome !

Since you have it working now, please update the thread title prepending [solved] so other forum users may know a solution has been found :)