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XmlTextWriter.WriteProcessingInstruction-Methode

Schreibt eine Verarbeitungsanweisung mit einem Leerzeichen zwischen dem Namen und dem Text wie folgt: <?name text?>.

Namespace: System.Xml
Assembly: System.Xml (in system.xml.dll)

Syntax

'Declaration
Public Overrides Sub WriteProcessingInstruction ( _
    name As String, _
    text As String _
)
'Usage
Dim instance As XmlTextWriter
Dim name As String
Dim text As String

instance.WriteProcessingInstruction(name, text)

public override void WriteProcessingInstruction (
    string name,
    string text
)

public:
virtual void WriteProcessingInstruction (
    String^ name, 
    String^ text
) override

public void WriteProcessingInstruction (
    String name, 
    String text
)

public override function WriteProcessingInstruction (
    name : String, 
    text : String
)

Parameter

  • name
    Name der Verarbeitungsanweisung.
  • text
    In die Verarbeitungsanweisung einzufügender Text.

Ausnahmen

Ausnahmetyp Bedingung

ArgumentException

Der Text ergibt kein wohlgeformtes XML-Dokument.

name ist entweder NULL (Nothing in Visual Basic) oder String.Empty.

Diese Methode wird zum Erstellen einer XML-Deklaration verwendet, nachdem WriteStartDocument bereits aufgerufen wurde.

Hinweise

Hinweis

Die empfohlene Vorgehensweise für die Version Microsoft .NET Framework, Version 2.0 besteht darin, mithilfe der System.Xml.XmlWriter.Create-Methode und der XmlWriterSettings-Klasse XmlWriter-Instanzen zu erstellen. So können Sie alle neuen Features dieser Version in vollem Umfang nutzen. Weitere Informationen finden Sie unter Erstellen von XML-Writern.

Wenn text entweder NULL (Nothing in Visual Basic) oder String.Empty ist, schreibt diese Methode eine ProcessingInstruction ohne Dateninhalt, z. B. <?name?>.

Beispiel

Im folgenden Beispiel wird eine XML-Datei geschrieben, die ein Buch darstellt.

Option Explicit
Option Strict

Imports System
Imports System.IO
Imports System.Xml

Public Class Sample
    Private Shared filename As String = "sampledata.xml"
    Public Shared Sub Main()
        Dim writer As XmlTextWriter = Nothing
        
        writer = New XmlTextWriter(filename, Nothing)
        'Use indenting for readability.
        writer.Formatting = Formatting.Indented
        
        'Write the XML delcaration. 
        writer.WriteStartDocument()
        
        'Write the ProcessingInstruction node.
        Dim PItext As String = "type='text/xsl' href='book.xsl'"
        writer.WriteProcessingInstruction("xml-stylesheet", PItext)
        
        'Write the DocumentType node.
        writer.WriteDocType("book", Nothing, Nothing, "<!ENTITY h 'hardcover'>")
        
        'Write a Comment node.
        writer.WriteComment("sample XML")
        
        'Write a root element.
        writer.WriteStartElement("book")
        
        'Write the genre attribute.
        writer.WriteAttributeString("genre", "novel")
        
        'Write the ISBN attribute.
        writer.WriteAttributeString("ISBN", "1-8630-014")
        
        'Write the title.
        writer.WriteElementString("title", "The Handmaid's Tale")
        
        'Write the style element.
        writer.WriteStartElement("style")
        writer.WriteEntityRef("h")
        writer.WriteEndElement()
        
        'Write the price.
        writer.WriteElementString("price", "19.95")
        
        'Write CDATA.
        writer.WriteCData("Prices 15% off!!")
        
        'Write the close tag for the root element.
        writer.WriteEndElement()
        
        writer.WriteEndDocument()
        
        'Write the XML to file and close the writer.
        writer.Flush()
        writer.Close()
        
        'Load the file into an XmlDocument to ensure well formed XML.
        Dim doc As New XmlDocument()
        'Preserve white space for readability.
        doc.PreserveWhitespace = True
        'Load the file.
        doc.Load(filename)
        
        'Display the XML content to the console.
        Console.Write(doc.InnerXml)
    End Sub 'Main 
End Class 'Sample

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

public class Sample
{
  private const string filename = "sampledata.xml";

  public static void Main()
  {
     XmlTextWriter writer = null;

     writer = new XmlTextWriter (filename, null);
     //Use indenting for readability.
     writer.Formatting = Formatting.Indented;

     //Write the XML delcaration. 
     writer.WriteStartDocument();

     //Write the ProcessingInstruction node.
     String PItext="type='text/xsl' href='book.xsl'";
     writer.WriteProcessingInstruction("xml-stylesheet", PItext);

     //Write the DocumentType node.
     writer.WriteDocType("book", null , null, "<!ENTITY h 'hardcover'>");
        
     //Write a Comment node.
     writer.WriteComment("sample XML");
    
     //Write a root element.
     writer.WriteStartElement("book");

     //Write the genre attribute.
     writer.WriteAttributeString("genre", "novel");
    
     //Write the ISBN attribute.
     writer.WriteAttributeString("ISBN", "1-8630-014");

     //Write the title.
     writer.WriteElementString("title", "The Handmaid's Tale");
              
     //Write the style element.
     writer.WriteStartElement("style");
     writer.WriteEntityRef("h");
     writer.WriteEndElement(); 

     //Write the price.
     writer.WriteElementString("price", "19.95");

     //Write CDATA.
     writer.WriteCData("Prices 15% off!!");

     //Write the close tag for the root element.
     writer.WriteEndElement();
             
     writer.WriteEndDocument();

     //Write the XML to file and close the writer.
     writer.Flush();
     writer.Close();  

     //Load the file into an XmlDocument to ensure well formed XML.
     XmlDocument doc = new XmlDocument();
     //Preserve white space for readability.
     doc.PreserveWhitespace = true;
     //Load the file.
     doc.Load(filename);  
    
     //Display the XML content to the console.
     Console.Write(doc.InnerXml);  

  }

}

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlTextWriter^ writer = nullptr;
   String^ filename = "sampledata.xml";
   writer = gcnew XmlTextWriter( filename, nullptr );
   
   //Use indenting for readability.
   writer->Formatting = Formatting::Indented;
   
   //Write the XML delcaration. 
   writer->WriteStartDocument();
   
   //Write the ProcessingInstruction node.
   String^ PItext = "type='text/xsl' href='book.xsl'";
   writer->WriteProcessingInstruction( "xml-stylesheet", PItext );
   
   //Write the DocumentType node.
   writer->WriteDocType( "book", nullptr, nullptr, "<!ENTITY h 'hardcover'>" );
   
   //Write a Comment node.
   writer->WriteComment( "sample XML" );
   
   //Write a root element.
   writer->WriteStartElement( "book" );
   
   //Write the genre attribute.
   writer->WriteAttributeString( "genre", "novel" );
   
   //Write the ISBN attribute.
   writer->WriteAttributeString( "ISBN", "1-8630-014" );
   
   //Write the title.
   writer->WriteElementString( "title", "The Handmaid's Tale" );
   
   //Write the style element.
   writer->WriteStartElement( "style" );
   writer->WriteEntityRef( "h" );
   writer->WriteEndElement();
   
   //Write the price.
   writer->WriteElementString( "price", "19.95" );
   
   //Write CDATA.
   writer->WriteCData( "Prices 15% off!!" );
   
   //Write the close tag for the root element.
   writer->WriteEndElement();
   writer->WriteEndDocument();
   
   //Write the XML to file and close the writer.
   writer->Flush();
   writer->Close();
   
   //Load the file into an XmlDocument to ensure well formed XML.
   XmlDocument^ doc = gcnew XmlDocument;
   
   //Preserve white space for readability.
   doc->PreserveWhitespace = true;
   
   //Load the file.
   doc->Load( filename );
   
   //Display the XML content to the console.
   Console::Write( doc->InnerXml );
}

import System.*;
import System.IO.*;
import System.Xml.*;

public class Sample
{
    private static String fileName = "sampledata.xml";

    public static void main(String[] args)
    {
        XmlTextWriter writer = null;
        writer = new XmlTextWriter(fileName, null);

        //Use indenting for readability.
        writer.set_Formatting(Formatting.Indented);

        //Write the XML delcaration. 
        writer.WriteStartDocument();

        //Write the ProcessingInstruction node.
        String piText = "type='text/xsl' href='book.xsl'";
        writer.WriteProcessingInstruction("xml-stylesheet", piText);

        //Write the DocumentType node.
        writer.WriteDocType("book", null, null, "<!ENTITY h 'hardcover'>");

        //Write a Comment node.
        writer.WriteComment("sample XML");

        //Write a root element.
        writer.WriteStartElement("book");

        //Write the genre attribute.
        writer.WriteAttributeString("genre", "novel");

        //Write the ISBN attribute.
        writer.WriteAttributeString("ISBN", "1-8630-014");

        //Write the title.
        writer.WriteElementString("title", "The Handmaid's Tale");

        //Write the style element.
        writer.WriteStartElement("style");
        writer.WriteEntityRef("h");
        writer.WriteEndElement();

        //Write the price.
        writer.WriteElementString("price", "19.95");

        //Write CDATA.
        writer.WriteCData("Prices 15% off!!");

        //Write the close tag for the root element.
        writer.WriteEndElement();
        writer.WriteEndDocument();

        //Write the XML to file and close the writer.
        writer.Flush();
        writer.Close();

        //Load the file into an XmlDocument to ensure well formed XML.
        XmlDocument doc =  new XmlDocument();

        //Preserve white space for readability.
        doc.set_PreserveWhitespace(true);

        //Load the file.
        doc.Load(fileName);

        //Display the XML content to the console.
        Console.Write(doc.get_InnerXml());
    } //main 
} //Sample

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

.NET Compact Framework

Unterstützt in: 2.0, 1.0

Siehe auch

Referenz

XmlTextWriter-Klasse
XmlTextWriter-Member
System.Xml-Namespace

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