public static int GetDepthLevel(this SiteMapNode node)
{ //TODO: Unit test
// Pre-conditions
if (node == null)
{
throw new ArgumentNullException("node", "node is null.");
}
SiteMapNode level1Node = node.GetParentSiteMapNodeByLevel(1); // First non-root
int result = 0; // parent.
SiteMapNode currentNode = node;
while ((currentNode.ParentNode != null) && (currentNode != level1Node)) // Count the distance to the first non-root
{ // parent.
result++;
currentNode = currentNode.ParentNode;
}
return(++result); // increment by one because we're zero-based
}