remove node in xml file

[mattia]

Hello, i need to create a function to remove a whole xml Node, in my case i need to remove the node starting with "group" tag.
This is a my xml file snip:

<?xml version='1.0' encoding='UTF-8'?>
<twm version="1.0" modify_date="2008-03-06T13:03:19" creation_date="2008-03-06T13:03:19">
    <group name="test" >				// remove 
        <option key="key" tagName="tagValue" />         // remove
    </group>						// remove
</twm>

<?xml version='1.0' encoding='UTF-8'?>
<twm version="1.0" modify_date="2008-03-06T13:03:19" creation_date="2008-03-06T13:03:19">
    <group name="test" >				// remove 
        <option key="key" tagName="tagValue" />         // remove
    </group>						// remove
</twm>

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and this is the code used to remove the node, but it doesn not work.

bool twmXMLObject::removeGroup ( QDomDocument * twmDomDocument , QString theGroupName )
{
	QDomNodeList domTwm = twmDomDocument->elementsByTagName( "group" );
 
	if ( !domTwm.isEmpty() )
	{
		for ( uint i = 0; i < domTwm.length(); i++ )
		{
			if ( domTwm.at(i).toElement().attribute( "name" ) == theGroupName )
			{
				twmDomDocument->removeChild( domTwm.at(i) );
			}
		}
	}
}

bool twmXMLObject::removeGroup ( QDomDocument * twmDomDocument , QString theGroupName )
{
	QDomNodeList domTwm = twmDomDocument->elementsByTagName( "group" );

	if ( !domTwm.isEmpty() )
	{
		for ( uint i = 0; i < domTwm.length(); i++ )
		{
			if ( domTwm.at(i).toElement().attribute( "name" ) == theGroupName )
			{
				twmDomDocument->removeChild( domTwm.at(i) );
			}
		}
	}
}

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After call the function removeGroup i save the xml file.
Any idea?
thx

[jpn]

From QDomNode::removeChild() docs:

Removes oldChild from the list of children. oldChild must be a direct child of this node.

In your case it's not a direct child of the document node. So use QDomNode::parentNode() or QDomDocument::documentElement() and remove it from the direct parent.