XML LINQ

Obtaining Restricted Elements Without Reaching While Ordering and Using Query Expression Syntax

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", "A"),
              new XElement("LastName", "B")),
           new XElement("Book",
             new XAttribute("type", "Author"),
             new XElement("FirstName", "C"),
             new XElement("LastName", "D"))));

        IEnumerable<XElement> elements =
          from e in xDocument.Descendants("Book")
          where ((string)e.Attribute("type")) != "Illustrator"
          orderby ((string)e.Element("LastName"))
          select e;

        foreach (XElement element in elements) {
            Console.WriteLine("Element: {0} : value = {1}",element.Name, element.Value);
        }
    }
}

Obtaining Restricted Elements Without Reaching

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", "A"),
              new XElement("LastName", "B")),

          new XElement("Book",
            new XAttribute("type", "Author"),
            new XElement("FirstName", "C"),
            new XElement("LastName", "D"))));

        IEnumerable<XElement> elements = xDocument.Descendants("Book")
           .Where(e => ((string)e.Element("FirstName")) == "C");
        foreach (XElement element in elements) {
            Console.WriteLine("Element: {0} : value = {1}",element.Name, element.Value);
        }
    }
}

Obtaining Elements Without Reaching

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", "A"),
          new XElement("LastName", "B")),
          new XElement("Book",
          new XAttribute("type", "Author"),
          new XElement("FirstName", "C"),
          new XElement("LastName", "D"))));
        IEnumerable<XElement> elements = xDocument.Descendants("Book");
        foreach (XElement element in elements) {
            Console.WriteLine("Element: {0} : value = {1}",element.Name, element.Value);
        }
    }
}

Adding a Node to the End of the Specified Node's Child Nodes with Add

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").Add(
          new XElement("Book",
            new XAttribute("type", "Author"),
            new XElement("FirstName", "E"),
            new XElement("LastName", "B")));

        Console.WriteLine(xDocument);
    }
}

An Example with a Single Book

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"))));

        Console.WriteLine(xDocument);
    }
}

Accessing the XML Document from an XElement Object via the Document Property

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 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"))));

        Console.WriteLine(firstParticipant.Document);
    }
}

Is an element empty

Posted on by coder 
   
 
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Linq;
using System.Reflection;
using System.Xml.Linq;

class Program {
    static void Main(string[] args) {
        XElement xml = XElement.Load("Employee.xml");
        XElement firstName = xml.Descendants("firstname").First();
        Console.WriteLine("Is FirstName tag empty? {0}", firstName.IsEmpty ? "Yes" : "No");
        XElement idEmployee = xml.Descendants("idperson").First();
        Console.WriteLine("Is idperson tag empty? {0}", idEmployee.IsEmpty ? "Yes" : "No");
    }
}