XmlNodeReader.ResolveEntity Método

public:
 override void ResolveEntity();

public override void ResolveEntity ();

override this.ResolveEntity : unit -> unit

Public Overrides Sub ResolveEntity ()

Excepciones

Ejemplos

En el ejemplo siguiente se usa ResolveEntity para expandir una entidad general.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlNodeReader^ reader = nullptr;
   try
   {
      
      //Create and load an XML document. 
      XmlDocument^ doc = gcnew XmlDocument;
      doc->LoadXml( "<!DOCTYPE book [<!ENTITY h 'hardcover'>]>"
      "<book>"
      "<title>Pride And Prejudice</title>"
      "<misc>&h;</misc>"
      "</book>" );
      
      //Create the reader.
      reader = gcnew XmlNodeReader( doc );
      reader->MoveToContent(); //Move to the root element.
      reader->Read(); //Move to title start tag.
      reader->Skip(); //Skip the title element.
      
      //Read the misc start tag.  The reader is now positioned on
      //the entity reference node.
      reader->ReadStartElement();
      
      //You must call ResolveEntity to expand the entity reference.
      //The entity replacement text is then parsed and returned as a child node.
      Console::WriteLine( "Expand the entity..." );
      reader->ResolveEntity();
      Console::WriteLine( "The entity replacement text is returned as a text node." );
      reader->Read();
      Console::WriteLine( "NodeType: {0} Value: {1}", reader->NodeType, reader->Value );
      Console::WriteLine( "An EndEntity node closes the entity reference scope." );
      reader->Read();
      Console::WriteLine( "NodeType: {0} Name: {1}", reader->NodeType, reader->Name );
   }
   finally
   {
      if ( reader != nullptr )
            reader->Close();
   }

}

using System;
using System.IO;
using System.Xml;

public class Sample
{
  public static void Main()
  {
     XmlNodeReader reader = null;

     try
     {
       //Create and load an XML document.
       XmlDocument doc = new XmlDocument();
       doc.LoadXml("<!DOCTYPE book [<!ENTITY h 'hardcover'>]>" +
                   "<book>" +
                   "<title>Pride And Prejudice</title>" +
                   "<misc>&h;</misc>" +
                   "</book>");

       //Create the reader.
       reader = new XmlNodeReader(doc);

       reader.MoveToContent();  //Move to the root element.
       reader.Read();  //Move to title start tag.
       reader.Skip();  //Skip the title element.

       //Read the misc start tag.  The reader is now positioned on
       //the entity reference node.
       reader.ReadStartElement();

       //You must call ResolveEntity to expand the entity reference.
       //The entity replacement text is then parsed and returned as a child node.
       Console.WriteLine("Expand the entity...");
       reader.ResolveEntity();

       Console.WriteLine("The entity replacement text is returned as a text node.");
       reader.Read();
       Console.WriteLine("NodeType: {0} Value: {1}", reader.NodeType ,reader.Value);

       Console.WriteLine("An EndEntity node closes the entity reference scope.");
       reader.Read();
       Console.WriteLine("NodeType: {0} Name: {1}", reader.NodeType,reader.Name);
    }
    finally
    {
       if (reader != null)
         reader.Close();
    }
  }
}

Option Explicit
Option Strict

Imports System.IO
Imports System.Xml

Public Class Sample
    
    Public Shared Sub Main()
        Dim reader As XmlNodeReader = Nothing
        
        Try
            'Create and load an XML document. 
            Dim doc As New XmlDocument()
            doc.LoadXml("<!DOCTYPE book [<!ENTITY h 'hardcover'>]>" & _
                        "<book>" & _
                        "<title>Pride And Prejudice</title>" & _
                        "<misc>&h;</misc>" & _
                        "</book>")
            
            'Create the reader.
            reader = New XmlNodeReader(doc)
            
            reader.MoveToContent() 'Move to the root element.
            reader.Read() 'Move to title start tag.
            reader.Skip() 'Skip the title element.
            'Read the misc start tag.  The reader is now positioned on
            'the entity reference node.
            reader.ReadStartElement()
            
            'You must call ResolveEntity to expand the entity reference.
            'The entity replacement text is then parsed and returned as a child node.
            Console.WriteLine("Expand the entity...")
            reader.ResolveEntity()
            
            Console.WriteLine("The entity replacement text is returned as a text node.")
            reader.Read()
            Console.WriteLine("NodeType: {0} Value: {1}", reader.NodeType, reader.Value)
            
            Console.WriteLine("An EndEntity node closes the entity reference scope.")
            reader.Read()
            Console.WriteLine("NodeType: {0} Name: {1}", reader.NodeType, reader.Name)
        
        Finally
            If Not (reader Is Nothing) Then
                reader.Close()
            End If
        End Try
    End Sub
End Class

Comentarios

Si el lector se coloca en un EntityReference nodo (XmlNodeType.EntityReference), si Read se llama a después de llamar a este método, se analiza el texto de reemplazo de la entidad. Cuando finaliza el texto de reemplazo de entidad, se devuelve un EndEntity nodo para cerrar el ámbito de referencia de entidad.

Se aplica a