You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
tqt3/doc/html/sqltable-example.html

122 lines
5.5 KiB

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/sql/sqltable/sqltable.doc:11 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>SQL Table</title>
<style type="text/css"><!--
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&nbsp;Classes</font></a>
| <a href="mainclasses.html">
<font color="#004faf">Main&nbsp;Classes</font></a>
| <a href="annotated.html">
<font color="#004faf">Annotated</font></a>
| <a href="groups.html">
<font color="#004faf">Grouped&nbsp;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 Table</h1>
<p>
This example shows how to use a <a href="tqdatatable.html">TQDataTable</a> to browse data in a SQL database.
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for TQt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include &lt;<a href="qapplication-h.html">ntqapplication.h</a>&gt;
#include &lt;<a href="tqsqldatabase-h.html">tqsqldatabase.h</a>&gt;
#include &lt;<a href="tqdatatable-h.html">tqdatatable.h</a>&gt;
#include &lt;<a href="tqsqlcursor-h.html">tqsqlcursor.h</a>&gt;
#include &lt;<a href="qmessagebox-h.html">ntqmessagebox.h</a>&gt;
/* Modify the following to match your environment */
#define DRIVER "TQSQLITE" /* see the TQt SQL documentation for a list of available drivers */
#define DATABASE ":memory:" /* the name of your database */
#define USER "" /* user name with appropriate rights */
#define PASSWORD "" /* password for USER */
#define HOST "" /* host on which the database is running */
class SimpleCursor : public <a href="tqsqlcursor.html">TQSqlCursor</a>
{
public:
SimpleCursor () : <a href="tqsqlcursor.html">TQSqlCursor</a>( "simpletable" ) {}
protected:
<a href="tqsqlrecord.html">TQSqlRecord</a>* primeInsert()
{
/* a real-world application would use sequences, or the like */
<a name="x2453"></a> <a href="tqsqlrecord.html">TQSqlRecord</a>* buf = TQSqlCursor::<a href="tqsqlcursor.html#primeInsert">primeInsert</a>();
<a href="tqsqlquery.html">TQSqlQuery</a> q( "select max(id)+1 from simpletable" );
if ( q.<a href="tqsqlquery.html#next">next</a>() )
<a name="x2464"></a> buf-&gt;<a href="tqsqlrecord.html#setValue">setValue</a>( "id", q.<a href="tqsqlquery.html#value">value</a>(0) );
return buf;
}
};
int main( int argc, char ** argv )
{
<a href="ntqapplication.html">TQApplication</a> a( argc, argv );
<a name="x2454"></a> <a href="tqsqldatabase.html">TQSqlDatabase</a> * db = TQSqlDatabase::<a href="tqsqldatabase.html#addDatabase">addDatabase</a>( DRIVER );
<a name="x2457"></a> db-&gt;<a href="tqsqldatabase.html#setDatabaseName">setDatabaseName</a>( DATABASE );
<a name="x2460"></a> db-&gt;<a href="tqsqldatabase.html#setUserName">setUserName</a>( USER );
<a name="x2459"></a> db-&gt;<a href="tqsqldatabase.html#setPassword">setPassword</a>( PASSWORD );
<a name="x2458"></a> db-&gt;<a href="tqsqldatabase.html#setHostName">setHostName</a>( HOST );
<a name="x2456"></a> if( !db-&gt;<a href="tqsqldatabase.html#open">open</a>() ){
<a name="x2455"></a> db-&gt;<a href="tqsqldatabase.html#lastError">lastError</a>().showMessage( "An error occured. Please read the README file in the sqltable"
"dir for more information.\n\n" );
return 1;
}
<a name="x2461"></a> if (!db-&gt;<a href="tqsqldatabase.html#tables">tables</a>().contains("simpletable")) {
<a href="tqsqlquery.html">TQSqlQuery</a> q("create table simpletable(id int, name varchar(20), address varchar(20))", db);
}
SimpleCursor cursor;
<a href="tqdatatable.html">TQDataTable</a> table( &amp;cursor ); /* data table uses our cursor */
<a name="x2451"></a> table.<a href="tqdatatable.html#addColumn">addColumn</a>( "name", "Name" );
table.<a href="tqdatatable.html#addColumn">addColumn</a>( "address", "Address" );
<a name="x2465"></a> table.<a href="tqtable.html#setSorting">setSorting</a>( TRUE );
a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( &amp;table );
<a name="x2452"></a> table.<a href="tqdatatable.html#refresh">refresh</a>(); /* load data */
table.<a href="tqwidget.html#show">show</a>(); /* show widget */
return a.<a href="ntqapplication.html#exec">exec</a>();
}
</pre>
<p> <p>See also <a href="sql-examples.html">TQt SQL Examples</a>.
<!-- eof -->
<p><address><hr><div align=center>
<table width=100% cellspacing=0 border=0><tr>
<td>Copyright &copy; 2007
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
<td align=right><div align=right>TQt 3.3.8</div>
</table></div></address></body>
</html>