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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/doc/sql.doc:44 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>sql/overview/order2/main.cpp Example File</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td valign=center> <a href="index.html"><font color="#004faf">Home</font></a> | <a href="classes.html"><font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</font></a></td><td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>sql/overview/order2/main.cpp Example File</h1> <pre>/****************************************************************************** $Id$**** 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 <<a href="qapplication-h.html">qapplication.h</a>>#include <<a href="qsqldatabase-h.html">qsqldatabase.h</a>>#include <<a href="qsqlcursor-h.html">qsqlcursor.h</a>>#include "../login.h"bool createConnections();int main( int argc, char *argv[] ){ <a href="qapplication.html">QApplication</a> app( argc, argv ); if ( createConnections() ) { <a href="qsqlcursor.html">QSqlCursor</a> cur( "staff" ); <a href="qstringlist.html">QStringList</a> fields = QStringList() << "id" << "forename"; <a href="qsqlindex.html">QSqlIndex</a> order = cur.<a href="qsqlcursor.html#index">index</a>( fields ); <a href="qsqlindex.html">QSqlIndex</a> filter = cur.<a href="qsqlcursor.html#index">index</a>( "surname" ); cur.<a href="qsqlrecord.html#setValue">setValue</a>( "surname", "Bloggs" ); cur.<a href="qsqlcursor.html#select">select</a>( filter, order ); while ( cur.<a href="qsqlquery.html#next">next</a>() ) { <a href="qapplication.html#qDebug">qDebug</a>( cur.<a href="qsqlquery.html#value">value</a>( "id" ).toString() + ": " + cur.<a href="qsqlquery.html#value">value</a>( "surname" ).toString() + " " + cur.<a href="qsqlquery.html#value">value</a>( "forename" ).toString() ); } } return 0;}bool createConnections(){ <a href="qsqldatabase.html">QSqlDatabase</a> *defaultDB = QSqlDatabase::<a href="qsqldatabase.html#addDatabase">addDatabase</a>( DB_SALES_DRIVER ); if ( ! defaultDB ) { <a href="qapplication.html#qWarning">qWarning</a>( "Failed to connect to driver" ); return FALSE; } defaultDB-><a href="qsqldatabase.html#setDatabaseName">setDatabaseName</a>( DB_SALES_DBNAME ); defaultDB-><a href="qsqldatabase.html#setUserName">setUserName</a>( DB_SALES_USER ); defaultDB-><a href="qsqldatabase.html#setPassword">setPassword</a>( DB_SALES_PASSWD ); defaultDB-><a href="qsqldatabase.html#setHostName">setHostName</a>( DB_SALES_HOST ); if ( ! defaultDB-><a href="qsqldatabase.html#open">open</a>() ) { <a href="qapplication.html#qWarning">qWarning</a>( "Failed to open sales database: " + defaultDB-><a href="qsqldatabase.html#lastError">lastError</a>().driverText() ); <a href="qapplication.html#qWarning">qWarning</a>( defaultDB-><a href="qsqldatabase.html#lastError">lastError</a>().databaseText() ); return FALSE; } <a href="qsqldatabase.html">QSqlDatabase</a> *oracle = QSqlDatabase::<a href="qsqldatabase.html#addDatabase">addDatabase</a>( DB_ORDERS_DRIVER, "ORACLE" ); if ( ! oracle ) { <a href="qapplication.html#qWarning">qWarning</a>( "Failed to connect to oracle driver" ); return FALSE; } oracle-><a href="qsqldatabase.html#setDatabaseName">setDatabaseName</a>( DB_ORDERS_DBNAME ); oracle-><a href="qsqldatabase.html#setUserName">setUserName</a>( DB_ORDERS_USER ); oracle-><a href="qsqldatabase.html#setPassword">setPassword</a>( DB_ORDERS_PASSWD ); oracle-><a href="qsqldatabase.html#setHostName">setHostName</a>( DB_ORDERS_HOST ); if ( ! oracle-><a href="qsqldatabase.html#open">open</a>() ) { <a href="qapplication.html#qWarning">qWarning</a>( "Failed to open orders database: " + oracle-><a href="qsqldatabase.html#lastError">lastError</a>().driverText() ); <a href="qapplication.html#qWarning">qWarning</a>( oracle-><a href="qsqldatabase.html#lastError">lastError</a>().databaseText() ); return FALSE; } return TRUE;}</pre><!-- eof --><p><address><hr><div align=center><table width=100% cellspacing=0 border=0><tr><td>Copyright © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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