Question40580634 xpath-with-xmldocument-not-finding-nodes

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.Xml;
using System.IO;
using System.Diagnostics;
using System.Collections.ObjectModel;
using System.Threading;
using System.ComponentModel;
using System.Xml.Linq;
using System.Reflection;
using System.Data;
using System.Xml.Schema;
using System.Text.RegularExpressions;
using System.Net;
using System.Xml.XPath;
using System.Globalization; 
using System.ComponentModel.DataAnnotations;
using System.Collections;

					
	public class Program
	{
		public static void Main()
		{
			var reader = new XmlDocument();
			reader.Load(@"http://www.fieldgulls.com/rss/current");

			var nsmgr = new XmlNamespaceManager(reader.NameTable);
			nsmgr.AddNamespace("a", "http://www.w3.org/2005/Atom");
			
			XmlNodeList list = reader.SelectNodes(".//a:entry", nsmgr);
			
			Console.WriteLine("Nodes found: {0}", list.Count);
			foreach (XmlElement element in list)
			{				
				Console.WriteLine("Name: {0}", XName.Get(element.LocalName, element.NamespaceURI));
				Console.WriteLine("Path without namespaces: {0}", element.GetXPath_SequentialIteration());
				//Console.WriteLine(element.OuterXml);
			}
			
			Console.WriteLine("Dumping a list of all element names and namespaces: ");
			Console.WriteLine(String.Join("\n", XDocument.Load(@"http://www.fieldgulls.com/rss/current").DumpXmlElementNames()));
		}
	}

    public static class XObjectExtensions
    {
        public static IEnumerable<string> DumpXmlElementNames(this XDocument doc)
        {
			return doc.Root.DumpXmlElementNames();
        }

		public static IEnumerable<string> DumpXmlElementNames(this XElement root)
        {
            if (root == null)
                return Enumerable.Empty<string>();
            var startCount = root.AncestorsAndSelf().Count();
            return root.DescendantsAndSelf().Select(el => string.Format("{0}\"{1}\"",
                new string(' ', 2 * (el.AncestorsAndSelf().Count() - startCount)), el.Name.ToString()));
        }
	}

	public static class XmlElementExtensions
	{
		// From http://stackoverflow.com/questions/9221073/get-full-path-to-current-node
		public static string GetXPath_SequentialIteration(this XmlElement element)
		{
			string path = "/" + element.Name;
	
			XmlElement parentElement = element.ParentNode as XmlElement;
			if (parentElement != null)
			{
				// Gets the position within the parent element.
				// However, this position is irrelevant if the element is unique under its parent:
				XmlNodeList siblings = parentElement.SelectNodes(element.Name);
				if (siblings != null && siblings.Count > 1) // There's more than 1 element with the same name
				{
					int position = 1;
					foreach (XmlElement sibling in siblings)
					{
						if (sibling == element)
							break;
	
						position++;
					}
	
					path = path + "[" + position + "]";
				}
	
				// Climbing up to the parent elements:
				path = parentElement.GetXPath_SequentialIteration() + path;
			}
	
			return path;
		}
	}