/// <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);
            }
            if (list.Count == 0)
            {
                return null;
            }
            return list;
        }
Exemple #3
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        /// <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);
            }
            if (list.Count == 0)
            {
                return(null);
            }
            return(list);
        }
Exemple #4
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        /// <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);
        }