database.h

来自「奇趣公司比较新的qt/emd版本」· C头文件 代码 · 共 93 行

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#ifndef DATABASE_H
#define DATABASE_H

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

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 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, "
                       "2003)");
    query.exec("insert into albums values(2, 'A Temporary Dive', 1, 2005)");
    query.exec("insert into albums values(3, '...The Great October Sound', 2, "
                       "2002)");
    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;
}

#endif