creating Xml file using QT

hi ,
i have created an xml file using iostream in Qt , but i come to know we have to use xml Dom for manipulations like save, open,update and delete in the xml file .
i read the xml dom concept in C++ programming QT , but i didn't understand clearly how to create and read an xml domdocument, i am attaching xml file what i was created , please suggest me how to do this?

Thankyou

Reading is easy (this example, I should probably close the file.... oops)

Code:

---

QString filename = "C:/test.xml";
    QFile file(filename);
    if (!file.open(QFile::ReadOnly | QFile::Text))
    {
        qDebug(qPrintable(QString("Error: Cannot read file %1 %2").arg(filename).arg(file.errorString())));
        return;
    }
    QDomDocument doc;
    doc.setContent(&file);

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Is your real concern related to processing? Consider this small example that traverses a DOM tree

Code:

---

void pp(QTextStream& os, QDomNode node)
{
    while (!node.isNull())
    {
        if (node.isElement())
        {
            // Ignore attributes for now.
            //qDebug(qPrintable(QString("DEBUG: <%1>").arg(node.toElement().tagName())));
            os << "<" << node.toElement().tagName() << ">";
            if (node.hasChildNodes())
            {
                QDomNode childNode = node.firstChild();
                pp(os, childNode);
            }
            // Print all children
            //qDebug(qPrintable(QString("DEBUG: </%1>").arg(node.toElement().tagName())));
            os << "</" << node.toElement().tagName() << ">";
        }
        else if (node.isText())
        {
            os << node.toText().data();
        }
        else
        {
            qDebug(qPrintable(QString("Unexpected node type:")));
            //qDebug(qPrintable(QString("Unexpected node type: %1").arg((int)(node.NodeType()))));
        }
        node = node.nextSibling();
    }
}

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The example ignores attributes. The head node that I would pass as an argument is found using doc.documentElement().
This snippet copies a node out of a DOM tree and removes the node. I then insert the node in a different location.

Code:

---

QString xmlOriginal = "<xml><item><a>1</a></item><item><a>2</a></item></xml>";
    QDomDocument doc;
    doc.setContent(xmlOriginal);
    QDomElement docElement = doc.documentElement();
    QDomNode firstChild = docElement.firstChild();
    QDomNode secondChild = firstChild.nextSibling();
    QDomNode clonedNode = secondChild.cloneNode(true);
    doc.documentElement().removeChild(secondChild);
    doc.documentElement().insertBefore(clonedNode, firstChild);
    QString s2;
    QTextStream os2(&s2);
    os2 << "\nStream *****\n" << doc;
    qDebug(qPrintable(s2));

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Please dont start another thread for same topic [Original Post ]

Please go through the basics from QtAssistant,all the best