C++ (Qt)
dbWork::dbWork(QString host,QString user,QString passwd)
{
     QSqlError err = addConnection("QMYSQL","srv",host,user,passwd,3306);
    Dialog dd;
 
    if (err.type() != QSqlError::NoError) 
 dd.warningMessage(tr("An error occurred while opening the connection: ") + err.text());
  }
 
 
 
 
QSqlError dbWork::addConnection(const QString &driver, const QString &dbName, const QString &host,const QString &user, const QString &passwd, int port)
{
    static int cCount = 0;
 
    QSqlError err;
    db = QSqlDatabase::addDatabase(driver, QString("Browser%1").arg(++cCount));
    db.setDatabaseName(dbName);
    db.setHostName(host);
    db.setPort(port);
    if (!db.open(user, passwd)) {
        err = db.lastError();
        db = QSqlDatabase();
        QSqlDatabase::removeDatabase(QString("Browser%1").arg(cCount));
    }
 
 
    return err;
 
}
 

C++ (Qt)
void Browser::showTable(const QString &t)
{
 
 
    QSqlRelationalTableModel * model = new QSqlRelationalTableModel(table,db->db);
        model->setEditStrategy(QSqlTableModel::OnRowChange);
    model->setTable(t);
 
    model->setRelation(6, QSqlRelation("users", "id", "name"));
    model->setRelation(8, QSqlRelation("status", "id", "name"));
 
    if(this->enterDialog->userAccess=="1") model->setFilter("relTblAl_6.name='"+this->enterDialog->userName+"'");
    model->select();
 
 
    if (model->lastError().type() != QSqlError::NoError)
        emit statusMessage(model->lastError().text());
 
 
 
    table->setModel(model);
    table->setItemDelegate(new QSqlRelationalDelegate(table));
    //FtpUploadDelegate *itD=;
    table->setItemDelegateForColumn(12,new FtpUploadDelegate(table));
    table->setSortingEnabled(true);
    table->setGridStyle(Qt::DashLine);
    table->setColumnHidden(0, true);
    if(this->enterDialog->userAccess=="1"){
        table->setColumnHidden(6, true);
        table->setColumnHidden(8, true);
 
    }
 
 
    table->resizeColumnsToContents();
    //table->horizontalHeader()->setResizeMode(QHeaderView::Stretch);
    table->setEditTriggers(QAbstractItemView::DoubleClicked|QAbstractItemView::EditKeyPressed);
 
    connect(table->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),this, SLOT(currentChanged()));
    table->setEditTriggers(QAbstractItemView::DoubleClicked|QAbstractItemView::EditKeyPressed);
   // connect(table->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),this, SLOT(currentChanged()));
        connect(table->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),model, SLOT(submit()));
        connect(table->selectionModel(), SIGNAL(selectionChanged(QItemSelection,QItemSelection)),model, SLOT(submit()));
 
        if(this->enterDialog->userAccess=="3") table->setEditTriggers(QAbstractItemView::NoEditTriggers);
 
 
    updateActions();
}