main.cpp

来自「qt-x11-free-3.0.3.tar.gz minigui图形界面工具」· C++ 代码 · 共 81 行

/****************************************************************************
** $Id$
**
** 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() ) {
	QSqlDatabase *oracledb = QSqlDatabase::database( "ORACLE" );
	// Copy data from the oracle database to the ODBC (default)
	// database
	QSqlQuery target;
	QSqlQuery query( "SELECT id, name FROM people;", oracledb );
	if ( query.isActive() ) {
	    while ( query.next() ) {
		target.exec( "INSERT INTO people ( id, name ) VALUES ( " + 
			      query.value(0).toString() + 
			      ", '" + query.value(1).toString() +  "' );" );
	    }
	}
    }

    return 0;
}


bool createConnections()
{
    // create the default database connection
    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;
    }

    // create a named connection to oracle
    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;
}