internal XmlElementListListener(XmlDocument doc, XmlElementList elemList)
{
_doc = doc;
_elemList = new WeakReference(elemList);
_nodeChangeHandler = new XmlNodeChangedEventHandler(this.OnListChanged);
doc.NodeInserted += _nodeChangeHandler;
doc.NodeRemoved += _nodeChangeHandler;
}
private void OnListChanged(object sender, XmlNodeChangedEventArgs args)
{
lock (this)
{
if (_elemList != null)
{
XmlElementList el = (XmlElementList)_elemList.Target;
if (null != el)
{
el.ConcurrencyCheck(args);
}
else
{
_doc.NodeInserted -= _nodeChangeHandler;
_doc.NodeRemoved -= _nodeChangeHandler;
_elemList = null;
}
}
}
}
public XmlEmptyElementListEnumerator(XmlElementList list)
{
}
private int _changeCount; //save the total number that the dom tree has been changed ( insertion and deletetion ) when this enumerator is created
public XmlElementListEnumerator(XmlElementList list)
{
_list = list;
_curElem = null;
_changeCount = list.ChangeCount;
}
