Csharp/C Sharp by API/System.Xml.Linq/XDocument

new XDocument(

  

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("This is a new author."),
           new XProcessingInstruction("AuthorHandler", "new"),
         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 (XAttribute attr in firstParticipant.Attributes()) {
            Console.WriteLine(attr);
        }
    }
}

XDocument.Changed

  

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 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("{0}{1}", xDocument, System.Environment.NewLine);
        firstParticipant.Changing += new EventHandler<XObjectChangeEventArgs>(
          (object sender, XObjectChangeEventArgs cea) =>
            Console.WriteLine("Type of object changing: {0}, Type of change: {1}",
              sender.GetType().Name, cea.ObjectChange));
        firstParticipant.Changed += (object sender, XObjectChangeEventArgs cea) =>
          Console.WriteLine("Type of object changed: {0}, Type of change: {1}",
            sender.GetType().Name, cea.ObjectChange);
        xDocument.Changed += (object sender, XObjectChangeEventArgs cea) =>
          Console.WriteLine("Doc: Type of object changed: {0}, Type of change: {1}{2}",
            sender.GetType().Name, cea.ObjectChange, System.Environment.NewLine);

        firstParticipant.Element("FirstName").Value = "Seph";
        Console.WriteLine("{0}{1}", xDocument, System.Environment.NewLine);
    }
}

XDocument.Load

  
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Data.Linq;
using System.Reflection;
using System.Xml;
using System.Xml.Linq;
class Program {
    static void Main(string[] args) {
        XmlReader reader = XmlReader.Create("Employee.xml");
        XDocument xml = XDocument.Load(reader);
        Console.WriteLine(xml);
        XElement idperson = xml.Descendants("idP").Last();
        idperson.Add(new XElement("idperson",
                        new XAttribute("id", 1),
                        new XAttribute("year", 2006),
                        new XAttribute("salary", "16")));
        StringWriter sw = new StringWriter();
        XmlWriter w = XmlWriter.Create(sw);
        xml.Save(w);
        w.Close();
        Console.WriteLine(sw.ToString());
    }
}

XDocument.Validate

  
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Schema;
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("MiddleInitial", "C"),
              new XElement("LastName", "B")),
            new XElement("Book",
              new XAttribute("type", "Author"),
              new XElement("FirstName", "C"),
              new XElement("LastName", "D"))));
        Console.WriteLine(xDocument);
        XmlSchemaSet schemaSet = new XmlSchemaSet();
        schemaSet.Add(null, "bookparticipants.xsd");
        try {
            xDocument.Validate(schemaSet, null);
        } catch (XmlSchemaValidationException ex) {
            Console.WriteLine("Exception occurred: {0}", ex.Message);
        }
    }
}

XDocument.XPathSelectElement

  
using System;
using System.IO;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Schema;
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"))));
        XElement bookParticipant = xDocument.XPathSelectElement("//Books/Book[FirstName="A"]");
        Console.WriteLine(bookParticipant);
    }
}