/// <summary> /// Selects the first XmlNode that matches the XPath expression. /// </summary> /// <param name="xpath">The XPath expression. May not be null.</param> /// <returns>The first <see cref="HtmlNode"/> that matches the XPath query or a null reference if no matching node was found.</returns> public HtmlNode SelectSingleNode(string xpath) { if (xpath == null) { throw new ArgumentNullException("xpath"); } HtmlNodeNavigator nav = new HtmlNodeNavigator(_ownerdocument, this); XPathNodeIterator it = nav.Select(xpath); if (!it.MoveNext()) { return null; } HtmlNodeNavigator node = (HtmlNodeNavigator) it.Current; return node.CurrentNode; }
/// <summary> /// Selects a list of nodes matching the <see cref="XPath"/> expression. /// </summary> /// <param name="xpath">The XPath expression.</param> /// <returns>An <see cref="HtmlNodeCollection"/> containing a collection of nodes matching the <see cref="XPath"/> query, or <c>null</c> if no node matched the XPath expression.</returns> public HtmlNodeCollection SelectNodes(string xpath) { HtmlNodeCollection list = new HtmlNodeCollection(null); HtmlNodeNavigator nav = new HtmlNodeNavigator(_ownerdocument, this); XPathNodeIterator it = nav.Select(xpath); while (it.MoveNext()) { HtmlNodeNavigator n = (HtmlNodeNavigator) it.Current; list.Add(n.CurrentNode); } // SharpLeech edit /*if (list.Count == 0) { return null; }*/ return list; }