[solved]QXmlStreamWriter "setDevice(...)" not working

[mr_gui]

I have a problem with the setDevice function of QXmlStreamWriter.

If I do (like it is posted in the QT doc):
@
QByteArray ba;
QBuffer buffer( &ba );
QXmlStreamWriter xml_writer;
xml_writer.setDevice( &buffer );

xml_writer.writeStartDocument();
xml_writer.writeDTD("<!DOCTYPE xbel>");
xml_writer.writeStartElement("Element");
xml_writer.writeAttribute("version", "1.0");
xml_writer.writeEndDocument();
QString xml_file( ba );
@

I get an empty xml_file string (also the bytearray ba is empty).

If I do:

@
QByteArray ba;
//QBuffer buffer( &ba );
QXmlStreamWriter xml_writer( &ba );
//xml_writer.setDevice( &buffer );
....
@

I get the xml message in the bytearray and string.

What do I do wrong?

[edit: mark up code, Tobias Hunger]

[Felix]

i think you have to call buffer.open(QIODevice::WriteOnly). Have you tried this already?

[mr_gui]

Argh, of course that's the problem!! Thank you!

This is what happens if you write test routines in existing projects...