tes

#include "dialog.h"
#include "ui_dialog.h"
#include "QtSql/QtSql"
#include "QtSql/QSqlDatabase"
#include "QtSql/QSqlQuery"
#include "QMessageBox"
#include "QDebug"

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
    db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName("/home/anca/dbku");
    if(db.open())
    {
        ui->label_3->setText("Connect");
    }
    else
    {
        ui->label_3->setText("disconnect");
    }

}

Dialog::~Dialog()
{
    delete ui;
}

void Dialog::on_pushButton_2_clicked()
{
    if(db.isOpen())
    {
        qDebug() << "open";
    }
    QString user = ui->lineEdit->text();
    QString password = ui->lineEdit_2->text();

    QSqlQuery qry;
    if(qry.exec("select * from tblku"))
    {
        user = qry.value(1).toString();
        password = qry.value(1).toString();
    }
    else
    {
        QMessageBox::information(this, "warnig", "failed");
    }
}