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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>
<p>
This example shows how to use a <a href="ntqdatatable.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 <<a href="qapplication-h.html">ntqapplication.h</a>>
#include <<a href="qsqldatabase-h.html">ntqsqldatabase.h</a>>
#include <<a href="qdatatable-h.html">ntqdatatable.h</a>>
#include <<a href="qsqlcursor-h.html">ntqsqlcursor.h</a>>
#include <<a href="qmessagebox-h.html">ntqmessagebox.h</a>>
/* 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="ntqsqlcursor.html">TQSqlCursor</a>
{
public:
SimpleCursor () : <a href="ntqsqlcursor.html">TQSqlCursor</a>( "simpletable" ) {}
protected:
<a href="ntqsqlrecord.html">TQSqlRecord</a>* primeInsert()
{
/* a real-world application would use sequences, or the like */
<a name="x2453"></a> <a href="ntqsqlrecord.html">TQSqlRecord</a>* buf = TQSqlCursor::<a href="ntqsqlcursor.html#primeInsert">primeInsert</a>();
<a href="ntqsqlquery.html">TQSqlQuery</a> q( "select max(id)+1 from simpletable" );
if ( q.<a href="ntqsqlquery.html#next">next</a>() )
<a name="x2464"></a> buf-><a href="ntqsqlrecord.html#setValue">setValue</a>( "id", q.<a href="ntqsqlquery.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="ntqsqldatabase.html">TQSqlDatabase</a> * db = TQSqlDatabase::<a href="ntqsqldatabase.html#addDatabase">addDatabase</a>( DRIVER );
<a name="x2457"></a> db-><a href="ntqsqldatabase.html#setDatabaseName">setDatabaseName</a>( DATABASE );
<a name="x2460"></a> db-><a href="ntqsqldatabase.html#setUserName">setUserName</a>( USER );
<a name="x2459"></a> db-><a href="ntqsqldatabase.html#setPassword">setPassword</a>( PASSWORD );
<a name="x2458"></a> db-><a href="ntqsqldatabase.html#setHostName">setHostName</a>( HOST );
<a name="x2456"></a> if( !db-><a href="ntqsqldatabase.html#open">open</a>() ){
<a name="x2455"></a> db-><a href="ntqsqldatabase.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-><a href="ntqsqldatabase.html#tables">tables</a>().contains("simpletable")) {
<a href="ntqsqlquery.html">TQSqlQuery</a> q("create table simpletable(id int, name varchar(20), address varchar(20))", db);
}
SimpleCursor cursor;
<a href="ntqdatatable.html">TQDataTable</a> table( &cursor ); /* data table uses our cursor */
<a name="x2451"></a> table.<a href="ntqdatatable.html#addColumn">addColumn</a>( "name", "Name" );
table.<a href="ntqdatatable.html#addColumn">addColumn</a>( "address", "Address" );
<a name="x2465"></a> table.<a href="ntqtable.html#setSorting">setSorting</a>( TRUE );
a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( &table );
<a name="x2452"></a> table.<a href="ntqdatatable.html#refresh">refresh</a>(); /* load data */
table.<a href="ntqwidget.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>.
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