How to get the grand parent and great grand parent of xml node

Question

any node above the current node in an hierarchical tree example the parent,grandparent,great-grandparent or the rot node are all ancestors of anode within an xml

How might I get the grand parent and great grand parent of a current node xml.

I'm using VB.Net in an ASP.NET application.

thank wow answers are beautiful

can i have something like XmlNode greatGrandParent = myNode.ParentNode.ParentNode.ParentNode.lastchild.lastchild

Answer 1

Using the System.Xml the XmlNode has a ParentNode property so you could use that to traverse up the tree.

Using the System.Xml.XPath the XPathNavigator has a MoveToParent method.

Using System.Xml.Linq the XNode class has an Ancestors method which can be a bit neater:-

GrandParent = Node.Ancestors.Skip(1).Single()
GreatGrandParent = Node.Ancestors.Skip(2).Single()

Answer 2

In (the dim) light of the very limited information provided, I would only suggest that you use the ParentNode property of the context XmlNode object.

eg. Get Grandparent:

XmlNode grandParent = myNode.ParentNode.ParentNode;

eg. Get Grandparent:

XmlNode greatGrandParent = myNode.ParentNode.ParentNode.ParentNode;

Note that this is prone to exceptions. For instance, if the current node does not have a ParentNode (or is of the type - Attribute, Document, DocumentFragment, Entity, Notation), then the code will throw an exception because such nodes cannot have Parents.

Please edit your question to provide more information so that answers can be "better".