To use XPath with LINQ to XML add a using declaration for System.Xml.XPath, this will bring the extension methods of System.Xml.XPath.Extensions into scope. In your example: var value = (string)xml.XPathEvaluate(“/response/data/hash”);
Yes, you can combine XmlReader with the method XNode.ReadFrom, see the example in the documentation which uses C# to selectively process nodes found by the XmlReader as an XElement.
The extensions methods: public static class XExtensions { /// <summary> /// Get the absolute XPath to a given XElement /// (e.g. “/people/person[6]/name[1]/last[1]”). /// </summary> public static string GetAbsoluteXPath(this XElement element) { if (element == null) { throw new ArgumentNullException(“element”); } Func<XElement, string> relativeXPath = e => { int index = e.IndexPosition(); string name = e.Name.LocalName; … Read more
I wanted to see which of these suggested solutions performed best, so I ran some comparative tests. Out of interest, I also compared the LINQ methods to the plain old System.Xml method suggested by Greg. The variation was interesting and not what I expected, with the slowest methods being more than 3 times slower than … Read more