XmlNodeReader.HasAttributes-Eigenschaft

Ruft einen Wert ab, der angibt, ob der aktuelle Knoten über Attribute verfügt.

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

Syntax

'Declaration
Public Overrides ReadOnly Property HasAttributes As Boolean
'Usage
Dim instance As XmlNodeReader
Dim value As Boolean

value = instance.HasAttributes

public override bool HasAttributes { get; }

public:
virtual property bool HasAttributes {
    bool get () override;
}

/** @property */
public boolean get_HasAttributes ()

public override function get HasAttributes () : boolean

Eigenschaftenwert

true, wenn der aktuelle Knoten über Attribute verfügt, andernfalls false.

Hinweise

Beispiel

Im folgenden Beispiel werden alle Attribute des Stammknotens gelesen.

Option Strict
Option Explicit

Imports System
Imports System.IO
Imports System.Xml

Public Class Sample
    
    Public Shared Sub Main()
        Dim reader As XmlNodeReader = Nothing
        Try
            'Create and load the XML document.
            Dim doc As New XmlDocument()
            doc.LoadXml("<book genre='novel' ISBN='1-861003-78' publicationdate='1987'> " & _
                       "</book>")
            
            'Load the XmlNodeReader 
            reader = New XmlNodeReader(doc)
            
            'Read the attributes on the root element.
            reader.MoveToContent()
            If reader.HasAttributes Then
                Dim i As Integer
                For i = 0 To reader.AttributeCount - 1
                    reader.MoveToAttribute(i)
                    Console.WriteLine("{0} = {1}", reader.Name, reader.Value)
                Next i
                'Return the reader to the book element.
                reader.MoveToElement()
            End If
        
        Finally
            If Not (reader Is Nothing) Then
                reader.Close()
            End If
        End Try
    End Sub 'Main 
End Class 'Sample

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

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

    try
    {
       //Create and load the XML document.
       XmlDocument doc = new XmlDocument();
       doc.LoadXml("<book genre='novel' ISBN='1-861003-78' publicationdate='1987'> " +
                   "</book>"); 

       //Load the XmlNodeReader 
       reader = new XmlNodeReader(doc);
  
       //Read the attributes on the root element.
       reader.MoveToContent();
       if (reader.HasAttributes){
         for (int i=0; i<reader.AttributeCount; i++){
            reader.MoveToAttribute(i);
            Console.WriteLine("{0} = {1}", reader.Name, reader.Value);
         }
         //Return the reader to the book element.
         reader.MoveToElement();
       }

     } 

     finally 
     {
        if (reader != null)
          reader.Close();
      }
  }
  
} // End class

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlNodeReader^ reader = nullptr;
   try
   {
      
      //Create and load the XML document.
      XmlDocument^ doc = gcnew XmlDocument;
      doc->LoadXml( "<book genre='novel' ISBN='1-861003-78' publicationdate='1987'> "
      "</book>" );
      
      //Load the XmlNodeReader 
      reader = gcnew XmlNodeReader( doc );
      
      //Read the attributes on the root element.
      reader->MoveToContent();
      if ( reader->HasAttributes )
      {
         for ( int i = 0; i < reader->AttributeCount; i++ )
         {
            reader->MoveToAttribute( i );
            Console::WriteLine( "{0} = {1}", reader->Name, reader->Value );

         }
         reader->MoveToElement();
      }
   }
   finally
   {
      if ( reader != nullptr )
            reader->Close();
   }

}

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

public class Sample
{
    public static void main(String[] args)
    {
        XmlNodeReader reader = null;

        try {
            //Create and load the XML document.
            XmlDocument doc = new XmlDocument();
            doc.LoadXml("<book genre='novel' ISBN='1-861003-78' "
                + "publicationdate='1987'></book>");

            //Load the XmlNodeReader 
            reader = new XmlNodeReader(doc);

            //Read the attributes on the root element.
            reader.MoveToContent();
            if (reader.get_HasAttributes()) {
                for (int i = 0; i < reader.get_AttributeCount(); i++) {
                    reader.MoveToAttribute(i);
                    Console.WriteLine("{0} = {1}", reader.get_Name(), 
                        reader.get_Value());
                }
                //Return the reader to the book element.
                reader.MoveToElement();
            }
        }
        finally {
            if (reader != null) {
                reader.Close();
            }
        }
    } //main
} //End class 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

XmlNodeReader-Klasse
XmlNodeReader-Member
System.Xml-Namespace

Weitere Ressourcen

Lesen von XML mit dem "XmlReader"