How to read the xml file using QXmlStreamReader

mythili

Hi I am having xml file. I want to read all the Id's from <Qu Id = > and the file names inside the tag 'file'.Please help me.

My xml file is
@<Response>
<Qu Id="1">
<An_Pas>
<file>Q1P1.png</file>
<file>Q1P2.png</file>
</An_Pas>
<Ro_pas>
<file>Q1R1.png</file>
</Ro_pas>
</Qu>
<Qu Id="2">
<An_Pas>
<file>Q2P1.png</file>
</An_Pas>
<Ro_pas>
<file>Q2R1.png</file>
<file>Q2R2.png</file>
</Ro_pas>
</Qu>
</Response>@

francescmm

Here are some examples:

"QtForum Parsing XML document":http://www.qtforum.org/article/28453/qxmlstreamreader-parsing-a-simple-xml-document.html

"Parsing XML in Qt":http://www.developer.nokia.com/Community/Wiki/QXmlStreamReader_to_parse_XML_in_Qt

mythili

please help me with the code

francescmm

The second link has the code your are looking for. You only have to copy and change some lines for your tags.

I can help you in doubts or problems but you have to try it yourself.

mythili

I have tried. But I am unable to read. Please check this and make changes if any. Thank u very much
@
void MainWindow::parseXML()
{

QFile* file = new QFile&#40;":/new/prefix1/recov.xml"&#41;;
if (!file->open(QIODevice::ReadOnly | QIODevice::Text)) {
    QMessageBox::critical(this,
                          "QXSRExample::parseXML",
                          "Couldn't open example.xml",
                          QMessageBox::Ok);
    return;
}
/* QXmlStreamReader takes any QIODevice. */
QXmlStreamReader xml(file);
QList< QMap<QString,QString> > persons;
/* We'll parse the XML until we reach end of it.*/
while(!xml.atEnd() &&  !xml.hasError()) {
    /* Read next element.*/
    QXmlStreamReader::TokenType token = xml.readNext();
    /* If token is just StartDocument, we'll go to next.*/
    if(token == QXmlStreamReader::StartDocument) {
        continue;
    }
    /* If token is StartElement, we'll see if we can read it.*/
    if(token == QXmlStreamReader::StartElement) {
        /* If it's named persons, we'll go to the next.*/
        if(xml.name() == "Response") {
            continue;
        }
        /* If it's named person, we'll dig the information from there.*/
        if(xml.name() == "Qu") {
            persons.append(this->parsePerson(xml));
        }
    }
}
/* Error handling. */
if(xml.hasError()) {
    QMessageBox::critical(this,
                          "QXSRExample::parseXML",
                          xml.errorString(),
                          QMessageBox::Ok);
}
/* Removes any device() or data from the reader
 * and resets its internal state to the initial state. */
xml.clear();
this->addPersonsToUI(persons);

}

QMap<QString, QString> MainWindow::parsePerson(QXmlStreamReader& xml)
{

QMap<QString, QString> person;
/* Let's check that we're really getting a person. */
if(xml.tokenType() != QXmlStreamReader::StartElement &&
        xml.name() == "Qu") {
    return person;
}
/* Let's get the attributes for person */
QXmlStreamAttributes attributes = xml.attributes();
/* Let's check that person has id attribute. */
if(attributes.hasAttribute("Id"))
{
    /* We'll add it to the map. */
    person["Id"] = attributes.value("Id").toString();
    qDebug()<<"id:"<<person["Id"]<<endl;
}

/* Next element... */
xml.readNext();

    if(xml.name() == "An_Pas")
    {

        if(xml.name() == "file")
        {
            QString elementName = xml.text().toString();
            qDebug()<<"add:"<<elementName<<endl;
        }
        xml.readNext();

    }

return person;

}

@

bjanuario

What method you want to use? JSON or DOM ?

walshmagger

This post is deleted!