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.NextNode.PreviousNode); } }
Calling the Only Nodes 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 XComment("This is a new 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.Element("Books").Elements("Book"); foreach (XElement element in elements) { Console.WriteLine("Source element: {0} : value = {1}", element.Name, element.Value); } foreach (XNode node in elements.Nodes()) { Console.WriteLine("Child node: {0}", node); } } }
Calling the Only InDocumentOrder 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 XComment("This is a new 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<XNode> nodes = xDocument.Element("Books").Elements("Book").Nodes().Reverse(); foreach (XNode node in nodes) { Console.WriteLine("Source node: {0}", node); } foreach (XNode node in nodes.InDocumentOrder()) { Console.WriteLine("Ordered node: {0}", node); } } }
XObject Event Handling Using Lambda Expressions
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); } }
XObject Event Handling
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(xDocument); firstParticipant.Changing += new EventHandler<XObjectChangeEventArgs>(MyChangingEventHandler); firstParticipant.Changed += new EventHandler<XObjectChangeEventArgs>(MyChangedEventHandler); xDocument.Changed += new EventHandler<XObjectChangeEventArgs>(DocumentChangedHandler); } public static void MyChangingEventHandler(object sender, XObjectChangeEventArgs cea) { Console.WriteLine("Type of object changing: {0}, Type of change: {1}", sender.GetType().Name, cea.ObjectChange); } public static void MyChangedEventHandler(object sender, XObjectChangeEventArgs cea) { Console.WriteLine("Type of object changed: {0}, Type of change: {1}", sender.GetType().Name, cea.ObjectChange); } public static void DocumentChangedHandler(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); } }
Traversing Forward from the Current Node Using the ElementsAfterSelf Method
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", new XComment("Begin Of List"), 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")), new XComment("End Of List"))); foreach (XNode node in firstParticipant.ElementsAfterSelf()) { Console.WriteLine(node); } } }
Calling the Second Elements 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 XComment("This is a new 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.Element("Books").Elements("Book"); foreach (XElement element in elements) { Console.WriteLine("Source element: {0} : value = {1}", element.Name, element.Value); } foreach (XElement element in elements.Elements("LastName")) { Console.WriteLine("Child element: {0}", element); } } }