Iterate over XML with QXmlStreamReader

moravas

Hi Folks,

I have to build a project that process XML files, so I started to learn a bit about Qt XML with QXmlStreamReader, but it seems I'm in trouble. I have a XML files, like this:

<?xml version="1.0" encoding="UTF-8"?>
<project>
<root name="readername">
<proeprty name="hwInputNumber" ...>
<proeprty name="defaultGateway" ...>
<enumeration name="input">
<proeprty name="trigger" ...>
</enumeration>
<enumeration name="output">
<proeprty name="adress" ...>
</enumeration>
</root>
</project>

and I wrote some code, that targets to print out the name of the XML nodes and the value of the "name" attribute:
@
QXmlStreamReader reader(&_project);
while (!reader.isEndDocument()) {
reader.readNextStartElement();
qDebug() << reader.name() << reader.attributes().value("name");
reader.skipCurrentElement();
else if(reader.isEndElement()) {
reader.readNextStartElement();
qDebug() << "";
}
}
@

It seems that the processing getting into an infinite loop when it reaches the "<proeprty name="trigger" ...>" line under the "enumeration" node.

I guessed that some "step back" should be exist that navigate me to the parent node, but I didn't found such a method in the API reference.

Can anybody help me?

Regards,
Norbert

SGaist

Hi,

You should take a look at the Stream Bookmarks example You'll see how to parse an an xml file.

moravas

Hi,

thank you very much, it was a really nice help. (Additionally, my XML file wasn't well formatted, but it's fixed).
But there is one thing that I didn't see, how can I relaize: how can I insert a node into an existing XML file?

Regards,
Norbert