Home | All Classes | Main Classes | Annotated | Grouped Classes | Functions |

# sql/overview/navigating/main.cpp Example File

    /****************************************************************************
    ** $Id$
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of an example program for Qt.  This example
    ** program may be used, distributed and modified without limitation.
    **
    *****************************************************************************/

    #include <qapplication.h>
    #include <qsqldatabase.h>
    #include <qsqlquery.h>
    #include "../login.h"

    bool createConnections();

    int main( int argc, char *argv[] )
    {
        QApplication app( argc, argv );

        if ( createConnections() ) {
            QSqlQuery query( "SELECT id, name FROM people ORDER BY name;" );
            if ( ! query.isActive() ) return 1; // Query failed
            int i;
            i = query.size();               // In this example we have 9 records; i == 9.
            query.first();                  // Moves to the first record.
            i = query.at();                 // i == 0
            query.last();                   // Moves to the last record.
            i = query.at();                 // i == 8
            query.seek( query.size() / 2 ); // Moves to the middle record.
            i = query.at();                 // i == 4
        }

        return 0;
    }

    bool createConnections()
    {

        QSqlDatabase *defaultDB = QSqlDatabase::addDatabase( DB_SALES_DRIVER );
        if ( ! defaultDB ) {
            qWarning( "Failed to connect to driver" );
            return FALSE;
        }
        defaultDB->setDatabaseName( DB_SALES_DBNAME );
        defaultDB->setUserName( DB_SALES_USER );
        defaultDB->setPassword( DB_SALES_PASSWD );
        defaultDB->setHostName( DB_SALES_HOST );
        if ( ! defaultDB->open() ) {
            qWarning( "Failed to open sales database: " +
                      defaultDB->lastError().driverText() );
            qWarning( defaultDB->lastError().databaseText() );
            return FALSE;
        }

        QSqlDatabase *oracle = QSqlDatabase::addDatabase( DB_ORDERS_DRIVER, "ORACLE" );
        if ( ! oracle ) {
            qWarning( "Failed to connect to oracle driver" );
            return FALSE;
        }
        oracle->setDatabaseName( DB_ORDERS_DBNAME );
        oracle->setUserName( DB_ORDERS_USER );
        oracle->setPassword( DB_ORDERS_PASSWD );
        oracle->setHostName( DB_ORDERS_HOST );
        if ( ! oracle->open() ) {
            qWarning( "Failed to open orders database: " +
                      oracle->lastError().driverText() );
            qWarning( oracle->lastError().databaseText() );
            return FALSE;
        }

        return TRUE;
    }