XmlValidatingReader.ResolveEntity 메서드

정의

네임스페이스:

System.Xml

어셈블리:

System.Xml.ReaderWriter.dll

어셈블리:

System.Xml.dll

어셈블리:

netstandard.dll

EntityReference 노드에 대해 엔터티 참조를 확인합니다.

public:
 override void ResolveEntity();

public override void ResolveEntity ();

override this.ResolveEntity : unit -> unit

Public Overrides Sub ResolveEntity ()

예외

InvalidOperationException

판독기가 EntityReference 노드에 배치되지 않은 경우

예제

다음 예제에서는 일반 엔터티를 확장하는 데 사용합니다 ResolveEntity .

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlValidatingReader^ reader = nullptr;
   XmlTextReader^ txtreader = nullptr;
   try
   {
      
      //Create and load the XmlTextReader with the XML file. 
      txtreader = gcnew XmlTextReader( "book1.xml" );
      txtreader->WhitespaceHandling = WhitespaceHandling::None;
      
      //Create the XmlValidatingReader over the XmlTextReader.
      //Set the reader to not expand general entities.
      reader = gcnew XmlValidatingReader( txtreader );
      reader->ValidationType = ValidationType::None;
      reader->EntityHandling = EntityHandling::ExpandCharEntities;
      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();
      
      //Because EntityHandling is set to ExpandCharEntities, you must call 
      //ResolveEntity to expand the entity.  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()
  {
     XmlValidatingReader reader = null;
     XmlTextReader txtreader = null;

     try
     {
       //Create and load the XmlTextReader with the XML file.
       txtreader = new XmlTextReader("book1.xml");
       txtreader.WhitespaceHandling = WhitespaceHandling.None;

       //Create the XmlValidatingReader over the XmlTextReader.
       //Set the reader to not expand general entities.
       reader = new XmlValidatingReader(txtreader);
       reader.ValidationType = ValidationType.None;
       reader.EntityHandling = EntityHandling.ExpandCharEntities;

       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();

       //Because EntityHandling is set to ExpandCharEntities, you must call
       //ResolveEntity to expand the entity.  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 Strict
Option Explicit

Imports System.IO
Imports System.Xml

Public Class Sample
   
   Public Shared Sub Main()
      Dim reader As XmlValidatingReader = Nothing
      Dim txtreader As XmlTextReader = Nothing
      
      Try
         'Create and load the XmlTextReader with the XML file. 
         txtreader = New XmlTextReader("book1.xml")
         txtreader.WhitespaceHandling = WhitespaceHandling.None
         
         'Create the XmlValidatingReader over the XmlTextReader.
         'Set the reader to not expand general entities.
         reader = New XmlValidatingReader(txtreader)
         reader.ValidationType = ValidationType.None
         reader.EntityHandling = EntityHandling.ExpandCharEntities
         
         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()
         
         'Because EntityHandling is set to ExpandCharEntities, you must call 
         'ResolveEntity to expand the entity.  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

이 예제에서는 파일을 book1.xml입력으로 사용합니다.

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

설명

참고

클래스는 XmlValidatingReader .NET Framework 2.0에서 사용되지 않습니다. 클래스 및 Create 메서드를 사용하여 유효성 XmlReader 검사 인스턴스를 XmlReaderSettings 만들 수 있습니다. 자세한 내용은 XmlReader 참조 페이지의 설명 섹션을 참조하세요.

판독기를 노드(XmlNodeType.EntityReference)에 EntityReference 배치하는 경우 이 메서드를 호출한 후 호출되면 Read 엔터티 대체 텍스트가 구문 분석됩니다. 엔터티 대체 텍스트가 완료되면 EndEntity 노드가 반환되어 엔터티 참조 범위를 닫습니다.

참고

이 메서드를 호출한 후 엔터티가 특성 값의 일부인 경우 엔터티를 한 단계씩 실행하도록 호출 ReadAttributeValue 해야 합니다.

추가 정보

• EntityHandling
• XmlReader