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122 lines
5.5 KiB
122 lines
5.5 KiB
13 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/sql/sqltable/sqltable.doc:11 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>SQL Table</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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a:link { color: #004faf; text-decoration: none }
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a:visited { color: #672967; text-decoration: none }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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| <a href="classes.html">
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<font color="#004faf">All Classes</font></a>
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| <a href="mainclasses.html">
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<font color="#004faf">Main Classes</font></a>
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| <a href="annotated.html">
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<font color="#004faf">Annotated</font></a>
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| <a href="groups.html">
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<font color="#004faf">Grouped Classes</font></a>
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| <a href="functions.html">
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<font color="#004faf">Functions</font></a>
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</td>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>SQL Table</h1>
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<p>
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This example shows how to use a <a href="qdatatable.html">TQDataTable</a> to browse data in a SQL database.
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include <<a href="qapplication-h.html">qapplication.h</a>>
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#include <<a href="qsqldatabase-h.html">qsqldatabase.h</a>>
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#include <<a href="qdatatable-h.html">qdatatable.h</a>>
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#include <<a href="qsqlcursor-h.html">qsqlcursor.h</a>>
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#include <<a href="qmessagebox-h.html">qmessagebox.h</a>>
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/* Modify the following to match your environment */
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#define DRIVER "TQSQLITE" /* see the TQt SQL documentation for a list of available drivers */
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#define DATABASE ":memory:" /* the name of your database */
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#define USER "" /* user name with appropriate rights */
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#define PASSWORD "" /* password for USER */
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#define HOST "" /* host on which the database is running */
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class SimpleCursor : public <a href="qsqlcursor.html">TQSqlCursor</a>
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{
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public:
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SimpleCursor () : <a href="qsqlcursor.html">TQSqlCursor</a>( "simpletable" ) {}
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protected:
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<a href="qsqlrecord.html">TQSqlRecord</a>* primeInsert()
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{
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/* a real-world application would use sequences, or the like */
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<a name="x2453"></a> <a href="qsqlrecord.html">TQSqlRecord</a>* buf = TQSqlCursor::<a href="qsqlcursor.html#primeInsert">primeInsert</a>();
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<a href="qsqlquery.html">TQSqlQuery</a> q( "select max(id)+1 from simpletable" );
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if ( q.<a href="qsqlquery.html#next">next</a>() )
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<a name="x2464"></a> buf-><a href="qsqlrecord.html#setValue">setValue</a>( "id", q.<a href="qsqlquery.html#value">value</a>(0) );
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return buf;
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}
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};
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int main( int argc, char ** argv )
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{
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<a href="qapplication.html">TQApplication</a> a( argc, argv );
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<a name="x2454"></a> <a href="qsqldatabase.html">TQSqlDatabase</a> * db = TQSqlDatabase::<a href="qsqldatabase.html#addDatabase">addDatabase</a>( DRIVER );
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<a name="x2457"></a> db-><a href="qsqldatabase.html#setDatabaseName">setDatabaseName</a>( DATABASE );
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<a name="x2460"></a> db-><a href="qsqldatabase.html#setUserName">setUserName</a>( USER );
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<a name="x2459"></a> db-><a href="qsqldatabase.html#setPassword">setPassword</a>( PASSWORD );
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<a name="x2458"></a> db-><a href="qsqldatabase.html#setHostName">setHostName</a>( HOST );
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<a name="x2456"></a> if( !db-><a href="qsqldatabase.html#open">open</a>() ){
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<a name="x2455"></a> db-><a href="qsqldatabase.html#lastError">lastError</a>().showMessage( "An error occured. Please read the README file in the sqltable"
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"dir for more information.\n\n" );
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return 1;
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}
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<a name="x2461"></a> if (!db-><a href="qsqldatabase.html#tables">tables</a>().contains("simpletable")) {
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<a href="qsqlquery.html">TQSqlQuery</a> q("create table simpletable(id int, name varchar(20), address varchar(20))", db);
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}
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SimpleCursor cursor;
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<a href="qdatatable.html">TQDataTable</a> table( &cursor ); /* data table uses our cursor */
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<a name="x2451"></a> table.<a href="qdatatable.html#addColumn">addColumn</a>( "name", "Name" );
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table.<a href="qdatatable.html#addColumn">addColumn</a>( "address", "Address" );
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<a name="x2465"></a> table.<a href="qtable.html#setSorting">setSorting</a>( TRUE );
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a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &table );
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<a name="x2452"></a> table.<a href="qdatatable.html#refresh">refresh</a>(); /* load data */
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table.<a href="qwidget.html#show">show</a>(); /* show widget */
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return a.<a href="qapplication.html#exec">exec</a>();
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}
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</pre>
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<p> <p>See also <a href="sql-examples.html">TQt SQL Examples</a>.
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<!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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</html>
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