CSharp - Define the schema programmatically

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Description

Define the schema programmatically

Demo

using System;
using System.Linq;
using System.Xml.Linq;
using System.Collections.Generic;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Schema;
using System.Xml.XPath;
using System.Xml.Xsl;
using System.IO;//from   w w  w  .  j  a v  a  2  s  .c  o m
class Program
{
    static void Main(string[] args){
          string schema =
        @"<?xml version='1.0' encoding='utf-8'?>
          <xs:schema attributeFormDefault='unqualified' elementFormDefault='qualified'
            xmlns:xs='http://www.w3.org/2001/XMLSchema'>
            <xs:element name='Books'>
              <xs:complexType>
                <xs:sequence>
                  <xs:element maxOccurs='unbounded' name='Book'>
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name='FirstName' type='xs:string' />
                        <xs:element minOccurs='0' name='MiddleInitial'
                          type='xs:string' />
                        <xs:element name='LastName' type='xs:string' />
                      </xs:sequence>
                      <xs:attribute name='type' type='xs:string' use='required' />
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
              </xs:complexType>
            </xs:element>
          </xs:schema>";

      XmlSchemaSet schemaSet = new XmlSchemaSet();
      schemaSet.Add("", XmlReader.Create(new StringReader(schema)));

XDocument xDocument = new XDocument(
  new XElement("Books",
    new XElement("Book",
      new XAttribute("type", "Author"),
      new XElement("FirstName", "Joe"),
      new XElement("LastName", "Ruby")),
    new XElement("Book",
      new XAttribute("type", "Editor"),
      new XElement("FirstName", "PHP"),
      new XElement("LastName", "Python"))));

Console.WriteLine("Here is the source XML document:");
Console.WriteLine("{0}{1}{1}", xDocument, System.Environment.NewLine);

//Now we will validate the document:

bool valid = true;
xDocument.Validate(schemaSet, (o, vea) =>
  {
    Console.WriteLine("An exception occurred processing object type {0}.",
      o.GetType().Name);

    Console.WriteLine(vea.Message);

    valid = false;
  }, true);

Console.WriteLine("Document validated {0}.{1}",
  valid ? "successfully" : "unsuccessfully",
  System.Environment.NewLine);

    }
}

Result

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