Access XML nodes

russjohn834

Hi all,

I have an XML of following structure:

<?xml version="1.0"?>
<subject_details>
 <Name>Name2</Name>
 <Surname>Surname2</Surname>
 <Patient_ID>PID02</Patient_ID>
 <Date>01/01/2000 00:00</Date>
 <Clinician_Note>note </Clinician_Note>
 <Settings>
  <Current>12</Current>
  <PW>120</PW>
  <Freq>30</Freq>
 </Settings>
</subject_details>

I'm using QDomDocument to read.
I can get individual node value by tagname, for ex:

root.elementsByTagName("Current").at(0).firstChild().nodeValue();

This gives me the Current node value 12

What's the method to get all node values under Settings node?

Thank you

mrjj

Hi
Often by simply enumerating the elements

QDomNode n = docElem.firstChild();
while(!n.isNull()) {
    QDomElement e = n.toElement(); // try to convert the node to an element.
    if(!e.isNull()) {
        cout << qPrintable(e.tagName()) << endl; // the node really is an element.
    }
    n = n.nextSibling();
}

https://doc.qt.io/qt-5/qdomdocument.html

JonB

@russjohn834
As @mrjj has said, QDomDocument basically wants you to walk the tree as necessary to visit things.

There is https://doc.qt.io/qt-5/qdomnode.html#childNodes to give you the list of children in one go instead of calling firstChild()/nextSibling() etc. But you'll still have to iterate through them if you want to see what's inside. You won't find a single "get all node values under node".

russjohn834

Thank you @mrjj , @JonB