Home · All Classes · Main Classes · Grouped Classes · Modules · Functions

database.h Example File

 ** Copyright (C) 2006-2008 Trolltech ASA. All rights reserved.
 ** This file is part of the documentation of the Qt Toolkit.
 ** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.2, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
** you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
** In addition, as a special exception, Trolltech, as the sole
** copyright holder for Qt Designer, grants users of the Qt/Eclipse
** Integration plug-in the right for the Qt/Eclipse Integration to
** link to functionality provided by Qt Designer and its related
** libraries.
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
** granted herein.
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE

 #ifndef DATABASE_H
 #define DATABASE_H

 #include <QMessageBox>
 #include <QSqlDatabase>
 #include <QSqlError>
 #include <QSqlQuery>

 static bool createConnection()
     QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
     if (!db.open()) {
         QMessageBox::critical(0, qApp->tr("Cannot open database"),
             qApp->tr("Unable to establish a database connection.\n"
                      "This example needs SQLite support. Please read "
                      "the Qt SQL driver documentation for information how "
                      "to build it.\n\n"
                      "Click Cancel to exit."), QMessageBox::Cancel);
         return false;

     QSqlQuery query;

     query.exec("create table artists (id int primary key, "
                                      "artist varchar(40), "
                                      "albumcount int)");

     query.exec("insert into artists values(0, '<all>', 0)");
     query.exec("insert into artists values(1, 'Ane Brun', 2)");
     query.exec("insert into artists values(2, 'Thomas Dybdahl', 3)");
     query.exec("insert into artists values(3, 'Kaizers Orchestra', 3)");

     query.exec("create table albums (albumid int primary key, "
                                      "title varchar(50), "
                                      "artistid int, "
                                      "year int)");

     query.exec("insert into albums values(1, 'Spending Time With Morgan', 1, "
     query.exec("insert into albums values(2, 'A Temporary Dive', 1, 2005)");
     query.exec("insert into albums values(3, '...The Great October Sound', 2, "
     query.exec("insert into albums values(4, 'Stray Dogs', 2, 2003)");
     query.exec("insert into albums values(5, "
         "'One day you`ll dance for me, New York City', 2, 2004)");
     query.exec("insert into albums values(6, 'Ompa Til Du D\xf8r', 3, 2001)");
     query.exec("insert into albums values(7, 'Evig Pint', 3, 2002)");
     query.exec("insert into albums values(8, 'Maestro', 3, 2005)");

     return true;


Copyright © 2008 Trolltech Trademarks
Qt 4.3.5