read file of text in Qt and show in QTextEdit

read_file_Qt

void MainWindow::readfile(){
    QString filename="test.txt";
    QFile file(filename);
    if(!file.exists()){
        qDebug() << "NO existe el archivo "<<filename;
    }else{
        qDebug() << filename<<" encontrado...";
    }
    QString line;
    ui->textEdit->clear();
    if (file.open(QIODevice::ReadOnly | QIODevice::Text)){
        QTextStream stream(&file);
        while (!stream.atEnd()){
            line = stream.readLine();
            ui->textEdit->setText(ui->textEdit->toPlainText()+line+"\n");
            qDebug() << "linea: "<<line;
        }
    }
    file.close();
}

Thanks! This helped me for my own project.

Try (l. 11)
if (file.open(QIODevice::ReadOnly | QIODevice::Text)){ ui->textEdit->setText(file.readAll()); }

Thanks, helped me too!

Thanks, helped me too!

Thanks, helped me too!