public static XQueryNodeIterator QueryNodes(this OpenXmlPart part, OpenXmlElement contextNode,
string xquery, XmlNamespaceManager nsmgr)
{
NameTable nameTable = new NameTable();
OpenXmlDocument doc = new OpenXmlDocument(part, nameTable);
OpenXmlNavigator node = new OpenXmlNavigator(new ElementAdapter(contextNode, new RootAdapter(doc.Part.RootElement, doc)));
OpenXmlQueryCommand command = new OpenXmlQueryCommand(nameTable);
if (nsmgr != null)
command.Context.CopyNamespaces(nsmgr);
command.ContextItem = node;
command.CommandText = xquery;
return command.Execute().Preload(); // Load all nodes for preventing to close container before finish query
}
public RootAdapter(OpenXmlElement elem, OpenXmlDocument doc)
: base(elem)
{
_doc = doc;
}
