Csharp/C Sharp/XML LINQ/Ancestors

A More Concise Example of Calling the First Ancestors Prototype

 
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(new XElement("Books",
  new XElement("Book",
    new XAttribute("type", "Author"),
    new XElement("FirstName", "J"),
   new XElement("LastName", "R")),
  new XElement("Book",
   new XAttribute("type", "Author"),
   new XElement("FirstName", "E"),
   new XElement("LastName", "B"))));
        foreach (XElement element in
         xDocument.Element("Books").Descendants("FirstName").Ancestors()) {
            Console.WriteLine("Ancestor element: {0}", element.Name);
        }
    }
}

An Example of Calling the First Ancestors Prototype

 
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XElement xDocument = new XElement(new XElement("Books",
         new XElement("Book",
           new XAttribute("type", "Author"),
           new XElement("FirstName", "J"),
          new XElement("LastName", "R")),
         new XElement("Book",
          new XAttribute("type", "Author"),
          new XElement("FirstName", "E"),
          new XElement("LastName", "B"))));
        IEnumerable<XElement> elements =
         xDocument.Element("Books").Descendants("FirstName");
        foreach (XElement element in elements) {
            Console.WriteLine("Source element: {0} : value = {1}",
             element.Name, element.Value);
        }
        foreach (XElement element in elements.Ancestors()) {
            Console.WriteLine("Ancestor element: {0}", element.Name);
        }
    }
}

Calling the Second Ancestors Prototype

 
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(
         new XElement("Books",
           new XElement("Book",
            new XAttribute("type", "Author"),
            new XElement("FirstName", "J"),
           new XElement("LastName", "R")),
           new XElement("Book",
            new XAttribute("type", "Author"),
           new XElement("FirstName", "E"),
           new XElement("LastName", "B"))));
        IEnumerable<XElement> elements = xDocument.Element("Books").Descendants("FirstName");
        foreach (XElement element in elements) {
            Console.WriteLine("Source element: {0} : value = {1}",element.Name, element.Value);
        }
        foreach (XElement element in elements.Ancestors("Book")) {
            Console.WriteLine("Ancestor element: {0}", element.Name);
        }
    }
}

Without Calling the Ancestors Operator

 
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(
         new XElement("Books",
           new XElement("Book",
            new XAttribute("type", "Author"),
            new XElement("FirstName", "J"),
           new XElement("LastName", "R")),
           new XElement("Book",
            new XAttribute("type", "Author"),
           new XElement("FirstName", "E"),
           new XElement("LastName", "B"))));
        IEnumerable<XElement> elements =
         xDocument.Element("Books").Descendants("FirstName");
        foreach (XElement element in elements) {
            Console.WriteLine("Source element: {0} : value = {1}",element.Name, element.Value);
        }
        foreach (XElement element in elements) {
            foreach (XElement e in element.Ancestors())
                Console.WriteLine("Ancestor element: {0}", e.Name);
        }
    }
}