Qt extract from xml with DOM

[Leoha_Zveri]

ok, so I have a xml file... smth like this:

<?xml version = "1.0" ?>
<!-- My Bookmarks -->
<db>
<user nr="1">
<username>Leoha_Zveri</username>
<password>testpass</password>
</user>
</db>

<?xml version = "1.0" ?>
<!-- My Bookmarks -->
<db>
<user nr="1">
<username>Leoha_Zveri</username>
<password>testpass</password>
</user>
</db>

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in my code i have a function:

bool DOMtraverseNode(const QDomNode& domNode) {
        QDomNode node = domNode.firstChild();
        while( !node.isNull() )
        {
            if ( node.isElement() )
            {
                QDomElement element = node.toElement();
                qDebug() << "Element: " << element.tagName();
                qDebug() << "Element attribute name: " << element.attribute("nr", "not set");
 
            }
 
            if (node.isText())
            {
                QDomText text = node.toText();
                qDebug() << text.data();
            }
 
 
            DOMtraverseNode(node);
            node = node.nextSibling();
        }
}

bool DOMtraverseNode(const QDomNode& domNode) {
        QDomNode node = domNode.firstChild();
        while( !node.isNull() )
        {
            if ( node.isElement() )
            {
                QDomElement element = node.toElement();
                qDebug() << "Element: " << element.tagName();
                qDebug() << "Element attribute name: " << element.attribute("nr", "not set");

            }

            if (node.isText())
            {
                QDomText text = node.toText();
                qDebug() << text.data();
            }

           
            DOMtraverseNode(node);
            node = node.nextSibling();
        }
}

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and in main:

QFile file("admin.xml");
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
        {
            qDebug("Failed to open file for reading.");
            return -1;
        }
 
        QDomDocument document;
        if (!document.setContent(&file))
        {
            qDebug("Failed to parse the file into a DOM tree.");
            file.close();
            return -1;
        }
 
        QDomElement domNode = document.documentElement();
        DOMtraverseNode(domNode);
 
 
        file.close();

QFile file("admin.xml");
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
        {
            qDebug("Failed to open file for reading.");
            return -1;
        }

        QDomDocument document;
        if (!document.setContent(&file))
        {
            qDebug("Failed to parse the file into a DOM tree.");
            file.close();
            return -1;
        }

        QDomElement domNode = document.documentElement();
        DOMtraverseNode(domNode);


        file.close();

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the question is... how do I check if a 2 QStrings (for example "uname" and "pass" ) entered by the user match, the values from the xml? I can check them separately, returning something from function when it matches the username, and another time when it matches the password,... but what if the xml looks like this:

<?xml version = "1.0" ?>
<!-- My Bookmarks -->
<db>
<user nr="1">
<username>Leoha_Zveri</username>
<password>testpass2</password>
</user>
<user nr="2">
<username>Leoha_Zveri2</username>
<password>testpass</password>
</user>
</db>

<?xml version = "1.0" ?>
<!-- My Bookmarks -->
<db>
<user nr="1">
<username>Leoha_Zveri</username>
<password>testpass2</password>
</user>
<user nr="2">
<username>Leoha_Zveri2</username>
<password>testpass</password>
</user>
</db>

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... functions will return that both values are contained in xml, and it will allow to log in, but it's wrong...
so how can i make this work?
sorry for my bad english...
please someone help