XmlTextReader.GetRemainder Metodo

public:
 System::IO::TextReader ^ GetRemainder();

public System.IO.TextReader GetRemainder();

member this.GetRemainder : unit -> System.IO.TextReader

Public Function GetRemainder () As TextReader

Restituisce

Oggetto TextReader contenente il resto del codice XML memorizzato nel buffer.

Esempio

Nell'esempio seguente viene letta la prima parte di un documento XML e quindi viene GetRemainder utilizzata per completare la lettura del documento utilizzando un secondo lettore.

using System;
using System.Xml;

public class Sample {

  private static string filename = "tworeads.xml";

  public static void Main() {

    XmlTextReader reader = new XmlTextReader(filename);
    reader.WhitespaceHandling=WhitespaceHandling.None;

    // Read the first part of the XML document
    while(reader.Read()) {
      // Display the elements and stop reading on the book endelement tag
      // then go to ReadPart2 to start another reader to read the rest of the file.
      switch(reader.NodeType) {
       case XmlNodeType.Element:
        Console.WriteLine("Name: {0}", reader.Name);
        break;
       case XmlNodeType.Text:
        Console.WriteLine("  Element Text: {0}", reader.Value);
        break;
       case XmlNodeType.EndElement:
        // Stop reading when the reader gets to the end element of the book node.
        if ("book"==reader.LocalName) {
          Console.WriteLine("End reading first book...");
          Console.WriteLine();
          goto ReadPart2;
        }
        break;
      }
    }

    // Read the rest of the XML document
    ReadPart2:
    Console.WriteLine("Begin reading second book...");

    // Create a new reader to read the rest of the document.
    XmlTextReader reader2 = new XmlTextReader(reader.GetRemainder());

    while(reader2.Read()) {
      switch (reader2.NodeType) {
        case XmlNodeType.Element:
         Console.WriteLine("Name: {0}", reader2.Name);
         break;
        case XmlNodeType.Text:
         Console.WriteLine("  Element Text: {0}", reader2.Value);
         break;
        case XmlNodeType.EndElement:
         // Stop reading when the reader gets to the end element of the book node.
         if ("book"==reader2.LocalName) {
           Console.WriteLine("End reading second book...");
           goto Done;
         }
         break;
      }
    }

    Done:
    Console.WriteLine("Done.");
    reader.Close();
    reader2.Close();
  }
}//End class

Imports System.Xml

Public Class Sample
    Private Shared filename As String = "tworeads.xml"
    
    Public Shared Sub Main()

        Dim reader As New XmlTextReader(filename)
        reader.WhitespaceHandling = WhitespaceHandling.None
        
        ' Read the first part of the XML document
        While reader.Read()
            ' Display the elements and stop reading on the book endelement tag
            ' then go to ReadPart2 to start another reader to read the rest of the file. 
            Select Case reader.NodeType
                Case XmlNodeType.Element
                    Console.WriteLine("Name: {0}", reader.Name)
                Case XmlNodeType.Text
                    Console.WriteLine("  Element Text: {0}", reader.Value)
                Case XmlNodeType.EndElement
                    ' Stop reading when the reader gets to the end element of the book node.
                    If "book" = reader.LocalName Then
                        Console.WriteLine("End reading first book...")
                        Console.WriteLine()
                        GoTo ReadPart2
                    End If
            End Select
        End While
        
        ' Read the rest of the XML document
        ReadPart2: 
        Console.WriteLine("Begin reading second book...")
        
        ' Create a new reader to read the rest of the document.
        Dim reader2 As New XmlTextReader(reader.GetRemainder())
        
        While reader2.Read()
            Select Case reader2.NodeType
                Case XmlNodeType.Element
                    Console.WriteLine("Name: {0}", reader2.Name)
                Case XmlNodeType.Text
                    Console.WriteLine("  Element Text: {0}", reader2.Value)
                Case XmlNodeType.EndElement
                    'Stop reading when the reader gets to the end element of the book node.
                    If "book" = reader2.LocalName Then
                        Console.WriteLine("End reading second book...")
                        GoTo Done
                    End If
            End Select
        End While
        
        Done: 
        Console.WriteLine("Done.")
        reader.Close()
        reader2.Close()
    End Sub
End Class

Nell'esempio viene usato il file di tworeads.xmlinput .

<?xml version="1.0" ?>
<bookstore>
 <book>
  <title>Pride And Prejudice</title>
  <author>Jane Austen</author>
 </book>
 <book>
  <title>The Handmaid's Tale</title>
  <author>Margaret Atwood</author>
 </book>
</bookstore>

Commenti

Poiché XmlTextReader esegue un buffer, deve essere in grado di restituire il resto del buffer inutilizzato Readin modo che nessun dato venga perso. In questo modo, i protocolli (ad esempio MIME in più parti) possono creare un pacchetto XML nello stesso flusso degli altri elementi.

Dopo aver chiamato questo metodo, EOF è impostato su true.

Vedi anche

• XmlReader