XmlValidatingReader::ValidationType Property

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Schema;
public ref class Sample
{
private:
   XmlTextReader^ txtreader;
   XmlValidatingReader^ reader;
   Boolean m_success;

public:
   Sample()
   {
      txtreader = nullptr;
      reader = nullptr;
      m_success = true;
      String^ doc1 = "notValid.xml";
      String^ doc2 = "cdDTD.xml";
      String^ doc3 = "book1.xml";

      //Parse the files and validate when requested.
      Validate( doc1, ValidationType::XDR ); //Validation should fail.
      Validate( doc2, ValidationType::DTD ); //Validation should fail.
      Validate( doc3, ValidationType::None ); //No validation performed.
   }


private:
   void Validate( String^ filename, ValidationType vt )
   {
      try
      {

         //Implement the readers.  Set the ValidationType.
         txtreader = gcnew XmlTextReader( filename );
         reader = gcnew XmlValidatingReader( txtreader );
         reader->ValidationType = vt;

         //If the reader is set to validate, set the event handler.
         if ( vt == ValidationType::None )
                  Console::WriteLine( "\nParsing XML file {0}", filename );
         else
         {
            Console::WriteLine( "\nValidating XML file {0}", filename );
            m_success = true;

            //Set the validation event handler.
            reader->ValidationEventHandler += gcnew ValidationEventHandler( this, &Sample::ValidationCallBack );
         }

         // Read XML data
         while ( reader->Read() )
         {}
         if ( vt == ValidationType::None )
                  Console::WriteLine( "Finished parsing file." );
         else
                  Console::WriteLine( "Validation finished. Validation {0}", m_success ? (String^)"successful" : "failed" );
      }
      finally
      {

         //Close the reader.
         if ( reader != nullptr )
                  reader->Close();
      }

   }


   //Display the validation errors.
   void ValidationCallBack( Object^ /*sender*/, ValidationEventArgs^ args )
   {
      m_success = false;
      Console::Write( "\r\n\tValidation error: {0}", args->Message );
   }

};

int main()
{
   gcnew Sample;
}

<?xml version='1.0'?>
<bookstore xmlns="x-schema:schema1.xdr">
  <book genre="novel" style="hardcover">
    <title>The Handmaid's Tale</title>
    <author>
      <first-name>Margaret</first-name>
      <last-name>Atwood</last-name>
    </author>
    <price>19.95</price>
  </book>
  <book genre="novel" style="other">
    <title>The Poisonwood Bible</title>
    <author>
      <first-name>Barbara</first-name>
      <last-name>Kingsolver</last-name>
    </author>
    <price>11.99</price>
  </book>
</bookstore>

<?xml version="1.0"?>
 <Schema xmlns="urn:schemas-microsoft-com:xml-data"
         xmlns:dt="urn:schemas-microsoft-com:datatypes">
   <ElementType name="first-name" content="textOnly"/>
   <ElementType name="last-name" content="textOnly"/>
   <ElementType name="name" content="textOnly"/>
   <ElementType name="price" content="textOnly" dt:type="fixed.14.4"/>
   <ElementType name="author" content="eltOnly" order="one">
     <group order="seq">
       <element type="name"/>
     </group>
     <group order="seq">
       <element type="first-name"/>
       <element type="last-name"/>
     </group>
   </ElementType>
   <ElementType name="title" content="textOnly"/>
   <AttributeType name="genre" dt:type="string"/>
   <AttributeType name="style" dt:type="enumeration"
         dt:values="paperback hardcover"/>
   <ElementType name="book" content="eltOnly">
     <attribute type="genre" required="yes"/>
     <attribute type="style" required="yes"/>
     <element type="title"/>
     <element type="author"/>
     <element type="price"/>
   </ElementType>
   <ElementType name="bookstore" content="eltOnly">
     <element type="book"/>
   </ElementType>
 </Schema>

<!--XML file using a DTD-->
<!DOCTYPE bookstore [
  <!ELEMENT bookstore (cd)*> 
  <!ELEMENT cd (title,artist,price)>
  <!ATTLIST cd genre CDATA #REQUIRED>
  <!ELEMENT title (#PCDATA)>
  <!ELEMENT artist (#PCDATA)>
  <!ELEMENT price (#PCDATA)>]>
<bookstore>
  <cd genre="alternative"  ISBN="2-3631-4">
    <title>Americana</title>
    <artist>Offspring</artist>
    <price>16.95</price>
  </cd>
</bookstore>

<?xml version='1.0' ?>
<!DOCTYPE book [<!ENTITY h 'hardcover'>]>
<book>
  <title>Pride And Prejudice</title>
  <misc>&h;</misc>
</book>