/// <summary>
/// Selects a single node (or returns null) matching the <see cref="XPath"/> expression.
/// </summary>
/// <param name="element">The element to start looking from.</param>
/// <param name="xpath">The XPath expression.</param>
/// <returns>The node matching <paramref name="xpath"/> query, if any.</returns>
/// <exception cref="ArgumentNullException">Throws if <paramref name="element"/> or <paramref name="xpath"/> is <c>null</c></exception>
public static INode SelectSingleNode(this IElement element, String xpath)
{
var el = element ?? throw new ArgumentNullException(nameof(element));
var xp = xpath ?? throw new ArgumentNullException(nameof(xpath));
var nav = new HtmlDocumentNavigator(el.Owner, el);
var it = nav.Select(xp);
if (it.MoveNext())
{
var node = (HtmlDocumentNavigator)it.Current;
return(node.CurrentNode);
}
return(null);
}
/// <summary>
/// Selects a list of nodes matching the <see cref="XPath"/> expression.
/// </summary>
/// <param name="element">The element to start looking from.</param>
/// <param name="xpath">The XPath expression.</param>
/// <returns>List of nodes matching <paramref name="xpath"/> query.</returns>
/// <exception cref="ArgumentNullException">Throws if <paramref name="element"/> or <paramref name="xpath"/> is <c>null</c></exception>
public static List <INode> SelectNodes(this IElement element, String xpath)
{
var el = element ?? throw new ArgumentNullException(nameof(element));
var xp = xpath ?? throw new ArgumentNullException(nameof(xpath));
var nav = new HtmlDocumentNavigator(el.Owner, el);
var it = nav.Select(xp);
var result = new List <INode>();
while (it.MoveNext())
{
var naviagtor = (HtmlDocumentNavigator)it.Current;
var e = naviagtor.CurrentNode;
result.Add(e);
}
return(result);
}
/// <summary>
/// Selects a list of nodes matching the <see cref="XPath"/> expression.
/// </summary>
/// <param name="element">The element to start looking from.</param>
/// <param name="xpath">The XPath expression.</param>
/// <param name="resolver"></param>
/// <param name="ignoreNamespaces"></param>
/// <returns>List of nodes matching <paramref name="xpath"/> query.</returns>
/// <exception cref="ArgumentNullException">Throws if <paramref name="element"/> or <paramref name="xpath"/> is <c>null</c></exception>
public static List <INode> SelectNodes(this IElement element, string xpath, IXmlNamespaceResolver resolver, bool ignoreNamespaces = true)
{
var el = element ?? throw new ArgumentNullException(nameof(element));
var xp = xpath ?? throw new ArgumentNullException(nameof(xpath));
var nav = new HtmlDocumentNavigator(el.Owner, el, ignoreNamespaces);
var it = nav.Select(xp, resolver ?? new XmlNamespaceManager(new NameTable()));
var result = new List <INode>();
while (it.MoveNext())
{
// ReSharper disable once IdentifierTypo
var naviagtor = (HtmlDocumentNavigator)it.Current;
// ReSharper disable once PossibleNullReferenceException
var e = naviagtor.CurrentNode;
result.Add(e);
}
return(result);
}
public static INode SelectSingleNode(this IElement element, string xpath)
{
if (element == null)
{
throw new ArgumentNullException(nameof(element));
}
if (xpath == null)
{
throw new ArgumentNullException(nameof(xpath));
}
HtmlDocumentNavigator nav = new HtmlDocumentNavigator(element.Owner, element);
XPathNodeIterator it = nav.Select(xpath);
if (!it.MoveNext())
{
return(null);
}
HtmlDocumentNavigator node = (HtmlDocumentNavigator)it.Current;
return(node.CurrentNode);
}