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")))); foreach (XNode node in firstParticipant.Nodes()) { Console.WriteLine(node); } } }
XML LINQ
Traversing Up from an XElement Object via the Parent Property
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.Parent); } }
Using SetElementValue to Update, Add, and Delete Child Elements
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")))); Console.WriteLine(xDocument); firstParticipant.SetElementValue("FirstName", "Joseph"); firstParticipant.SetElementValue("MiddleInitial", "C"); firstParticipant.SetElementValue("LastName", null); Console.WriteLine(xDocument); } }
Validating an XML Document
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("MiddleName", "Carson"), 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"); xDocument.Validate(schemaSet, (o, vea) => { Console.WriteLine(o.GetType().Name); Console.WriteLine(vea.Message); },true); foreach (XElement element in xDocument.Descendants()) { Console.WriteLine("Element {0} is {1}", element.Name, element.GetSchemaInfo().Validity); XmlSchemaElement se = element.GetSchemaInfo().SchemaElement; if (se != null) { Console.WriteLine( "Schema element {0} must have MinOccurs = {1} and MaxOccurs = {2}{3}", se.Name, se.MinOccurs, se.MaxOccurs, System.Environment.NewLine); } else { Console.WriteLine(); } } } }
Validating an XML Document with a Lambda Expression
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 XAttribute("language", "English"), new XElement("FirstName", "A"), 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, (o, vea) => { Console.WriteLine(o.GetType().Name); Console.WriteLine(vea.Message); throw (new Exception(vea.Message)); }); } catch (Exception ex) { Console.WriteLine("Exception occurred: {0}", ex.Message); } } }
Validating an XML Document with Default Validation Event Handling
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); } } }
Creating an XSD Schema by Inferring Itfrom an XML Document
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("LastName", "B")), new XElement("Book", new XAttribute("type", "Author"), new XElement("FirstName", "C"), new XElement("LastName", "D")))); Console.WriteLine(xDocument); xDocument.Save("bookparticipants.xml"); XmlSchemaInference infer = new XmlSchemaInference(); XmlSchemaSet schemaSet = infer.InferSchema(new XmlTextReader("bookparticipants.xml")); XmlWriter w = XmlWriter.Create("bookparticipants.xsd"); foreach (XmlSchema schema in schemaSet.Schemas()) { schema.Write(w); } w.Close(); XDocument newDocument = XDocument.Load("bookparticipants.xsd"); Console.WriteLine(newDocument); } }