XML LINQ

Calling the First AncestorsAndSelf Prototype

Posted on by coder 
   
 

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.AncestorsAndSelf()) {
            Console.WriteLine("Ancestor element: {0}", element.Name);
        }
    }
}

Traversing Up from an XElement Object via the AncestorsAndSelf Method

Posted on by coder 
   
 

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 firstParticipant;
        XDocument xDocument = new XDocument(
       new XDeclaration("1.0", "UTF-8", "yes"),
       new XDocumentType("Books", null, "Books.dtd", null),
       new XProcessingInstruction("Book", "out-of-print"),
       new XElement("Books", firstParticipant =
         new XElement("Book",
       new XComment("a new author."),
         new XProcessingInstruction("AuthorHandler", "new"),
         new XAttribute("type", "Author"),
         new XElement("FirstName",
       new XText("A"),
       new XElement("NickName", "J")),
      new XElement("LastName", "R")),
      new XElement("Book",
      new XAttribute("type", "Author"),
      new XElement("FirstName", "E"),
      new XElement("LastName", "B"))));
        foreach (XElement element in firstParticipant.
        Element("FirstName").Element("NickName").AncestorsAndSelf()) {
            Console.WriteLine(element.Name);
        }
    }
}

Calling the Second Ancestors Prototype

Posted on by coder 
   
 

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);
        }
    }
}

A More Concise Example of Calling the First Ancestors Prototype

Posted on by coder 
   
 

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);
        }
    }
}

Without Calling the Ancestors Operator

Posted on by coder 
   
 

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);
        }
    }
}

An Example of Calling the First Ancestors Prototype

Posted on by coder 
   
 

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);
        }
    }
}

Adding a Node to the Beginning of the Specified Node's Child Nodes with AddFirst

Posted on by coder 
   
 
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"))));

        xDocument.Element("Books").AddFirst(
          new XElement("Book",
            new XAttribute("type", "Author"),
            new XElement("FirstName", "E"),
            new XElement("LastName", "B")));
        Console.WriteLine(xDocument);
    }
}