/// <summary>
/// Select a list of nodes based on an XPath style string which match a particular type
/// </summary>
/// <example>
/// <code lang="cs">
/// Select all nodes in the tree with the name value
/// DataNode[] nodes = node.SelectNodes("//value");
/// </code>
/// </example>
/// <param name="path">The XPath selector</param>
/// <returns>A list of nodes select</returns>
public T[] SelectNodes <T>(string path) where T : DataNode
{
List <T> nodes = new List <T>();
try
{
XPathDataNavigator xpath = new XPathDataNavigator(this, false);
XPathNodeIterator it = xpath.Select(path.ToLower());
while (it.MoveNext())
{
T value = it.Current.UnderlyingObject as T;
if (value != null)
{
nodes.Add(value);
}
}
}
catch (XPathException ex)
{
Logger.GetSystemLogger().LogException(ex);
}
return(nodes.ToArray());
}
public override bool MoveTo(XPathNavigator other)
{
if (other is XPathDataNavigator)
{
XPathDataNavigator nav = other as XPathDataNavigator;
_currNode = nav._currNode;
return(true);
}
return(false);
}
public override bool IsSamePosition(XPathNavigator other)
{
if (other is XPathDataNavigator)
{
XPathDataNavigator x = other as XPathDataNavigator;
if (x._currNode == _currNode)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Select the first node which matches an XPath style path and is of the required type
/// </summary>
/// <param name="path">The XPath selector</param>
/// <typeparam name="T">The type of node to return</typeparam>
/// <returns>The first node, or null if none found</returns>
public T SelectSingleNode <T>(string path) where T : DataNode
{
try
{
XPathDataNavigator xpath = new XPathDataNavigator(this, false);
XPathNodeIterator it = xpath.Select(path.ToLower());
if (it.MoveNext())
{
T value = it.Current.UnderlyingObject as T;
if (value != null)
{
return(value);
}
}
}
catch (XPathException ex)
{
Logger.GetSystemLogger().LogException(ex);
}
return(null);
}