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Diffstat (limited to 'examples/sql/connection.h')
| -rw-r--r-- | examples/sql/connection.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/examples/sql/connection.h b/examples/sql/connection.h new file mode 100644 index 0000000..d4b77ef --- /dev/null +++ b/examples/sql/connection.h @@ -0,0 +1,136 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef CONNECTION_H +#define CONNECTION_H + +#include <QMessageBox> +#include <QSqlDatabase> +#include <QSqlError> +#include <QSqlQuery> + +/* + This file defines a helper function to open a connection to an + in-memory SQLITE database and to create a test table. + + If you want to use another database, simply modify the code + below. All the examples in this directory use this function to + connect to a database. +*/ +//! [0] +static bool createConnection() +{ + QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE"); + db.setDatabaseName(":memory:"); + 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 person (id int primary key, " + "firstname varchar(20), lastname varchar(20))"); + query.exec("insert into person values(101, 'Danny', 'Young')"); + query.exec("insert into person values(102, 'Christine', 'Holand')"); + query.exec("insert into person values(103, 'Lars', 'Gordon')"); + query.exec("insert into person values(104, 'Roberto', 'Robitaille')"); + query.exec("insert into person values(105, 'Maria', 'Papadopoulos')"); + + query.exec("create table offices (id int primary key," + "imagefile int," + "location varchar(20)," + "country varchar(20)," + "description varchar(100))"); + query.exec("insert into offices " + "values(0, 0, 'Oslo', 'Norway'," + "'Oslo is home to more than 500 000 citizens and has a " + "lot to offer.It has been called \"The city with the big " + "heart\" and this is a nickname we are happy to live up to.')"); + query.exec("insert into offices " + "values(1, 1, 'Brisbane', 'Australia'," + "'Brisbane is the capital of Queensland, the Sunshine State, " + "where it is beautiful one day, perfect the next. " + "Brisbane is Australia''s 3rd largest city, being home " + "to almost 2 million people.')"); + query.exec("insert into offices " + "values(2, 2, 'Redwood City', 'US'," + "'You find Redwood City in the heart of the Bay Area " + "just north of Silicon Valley. The largest nearby city is " + "San Jose which is the third largest city in California " + "and the 10th largest in the US.')"); + query.exec("insert into offices " + "values(3, 3, 'Berlin', 'Germany'," + "'Berlin, the capital of Germany is dynamic, cosmopolitan " + "and creative, allowing for every kind of lifestyle. " + "East meets West in the metropolis at the heart of a " + "changing Europe.')"); + query.exec("insert into offices " + "values(4, 4, 'Munich', 'Germany'," + "'Several technology companies are represented in Munich, " + "and the city is often called the \"Bavarian Silicon Valley\". " + "The exciting city is also filled with culture, " + "art and music. ')"); + query.exec("insert into offices " + "values(5, 5, 'Beijing', 'China'," + "'Beijing as a capital city has more than 3000 years of " + "history. Today the city counts 12 million citizens, and " + "is the political, economic and cultural centre of China.')"); + + query.exec("create table images (locationid int, file varchar(20))"); + query.exec("insert into images values(0, 'images/oslo.png')"); + query.exec("insert into images values(1, 'images/brisbane.png')"); + query.exec("insert into images values(2, 'images/redwood.png')"); + query.exec("insert into images values(3, 'images/berlin.png')"); + query.exec("insert into images values(4, 'images/munich.png')"); + query.exec("insert into images values(5, 'images/beijing.png')"); + + + + return true; +} +//! [0] + +#endif |