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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="qdatatable.html">QDataTable</a> to browse data in a SQL database.
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
**
** 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="qdatatable-h.html">qdatatable.h</a>>
#include <<a href="qsqlcursor-h.html">qsqlcursor.h</a>>
#include <<a href="qmessagebox-h.html">qmessagebox.h</a>>
/* Modify the following to match your environment */
#define DRIVER "QPSQL7" /* see the Qt SQL documentation for a list of available drivers */
#define DATABASE "simpledb" /* the name of your database */
#define USER "trond" /* user name with appropriate rights */
#define PASSWORD "trond" /* password for USER */
#define HOST "silverfish.troll.no" /* host on which the database is running */
class SimpleCursor : public <a href="qsqlcursor.html">QSqlCursor</a>
{
public:
SimpleCursor () : <a href="qsqlcursor.html">QSqlCursor</a>( "simpletable" ) {}
protected:
<a href="qsqlrecord.html">QSqlRecord</a>* primeInsert()
{
/* a real-world application would use sequences, or the like */
<a name="x2636"></a> <a href="qsqlrecord.html">QSqlRecord</a>* buf = QSqlCursor::<a href="qsqlcursor.html#primeInsert">primeInsert</a>();
<a href="qsqlquery.html">QSqlQuery</a> q( "select max(id)+1 from simpletable;" );
<a name="x2644"></a> if ( q.<a href="qsqlquery.html#next">next</a>() )
<a name="x2646"></a><a name="x2645"></a> buf-><a href="qsqlrecord.html#setValue">setValue</a>( "id", q.<a href="qsqlquery.html#value">value</a>(0) );
return buf;
}
};
int main( int argc, char ** argv )
{
<a href="qapplication.html">QApplication</a> a( argc, argv );
<a name="x2637"></a> <a href="qsqldatabase.html">QSqlDatabase</a> * db = QSqlDatabase::<a href="qsqldatabase.html#addDatabase">addDatabase</a>( DRIVER );
<a name="x2640"></a> db-><a href="qsqldatabase.html#setDatabaseName">setDatabaseName</a>( DATABASE );
<a name="x2643"></a> db-><a href="qsqldatabase.html#setUserName">setUserName</a>( USER );
<a name="x2642"></a> db-><a href="qsqldatabase.html#setPassword">setPassword</a>( PASSWORD );
<a name="x2641"></a> db-><a href="qsqldatabase.html#setHostName">setHostName</a>( HOST );
<a name="x2639"></a> if( !db-><a href="qsqldatabase.html#open">open</a>() ){
<a name="x2635"></a> QMessageBox::<a href="qmessagebox.html#information">information</a>( 0, "Unable to open database",
<a name="x2638"></a> db-><a href="qsqldatabase.html#lastError">lastError</a>().databaseText() + "\nPlease read the README file in the sqltable directory for more information.");
return 1;
}
SimpleCursor cursor;
<a href="qdatatable.html">QDataTable</a> table( &cursor ); /* data table uses our cursor */
<a name="x2633"></a> table.<a href="qdatatable.html#addColumn">addColumn</a>( "name", "Name" );
table.<a href="qdatatable.html#addColumn">addColumn</a>( "address", "Address" );
<a name="x2647"></a> table.<a href="qtable.html#setSorting">setSorting</a>( TRUE );
a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &table );
<a name="x2634"></a> table.<a href="qdatatable.html#refresh">refresh</a>(); /* load data */
table.<a href="qwidget.html#show">show</a>(); /* show widget */
return a.<a href="qapplication.html#exec">exec</a>();
}
</pre>
<p> <p>See also <a href="sql-examples.html">Qt SQL Examples</a>.
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