Using QString in C function ...

[jacek]

QString fileName = QFileDialog::getOpenFileName(this,tr("Open File"), QDir::currentPath());

Here you create a new fileName variable, if you have declared fileName as a member variable of your class, use this:

fileName = QFileDialog::getOpenFileName( this, tr( "Open File" ), QDir::currentPath() );

fileName = QFileDialog::getOpenFileName( this, tr( "Open File" ), QDir::currentPath() );

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