XmlWriter.WriteAttributes(XmlReader, Boolean) XmlWriter.WriteAttributes(XmlReader, Boolean) XmlWriter.WriteAttributes(XmlReader, Boolean) XmlWriter.WriteAttributes(XmlReader, Boolean) Method


When overridden in a derived class, writes out all the attributes found at the current position in the XmlReader.

 virtual void WriteAttributes(System::Xml::XmlReader ^ reader, bool defattr);
public virtual void WriteAttributes (System.Xml.XmlReader reader, bool defattr);
abstract member WriteAttributes : System.Xml.XmlReader * bool -> unit
override this.WriteAttributes : System.Xml.XmlReader * bool -> unit
Public Overridable Sub WriteAttributes (reader As XmlReader, defattr As Boolean)


XmlReader XmlReader XmlReader XmlReader

The XmlReader from which to copy the attributes.

Boolean Boolean Boolean Boolean

true to copy the default attributes from the XmlReader; otherwise, false.


The reader is not positioned on an element, attribute or XmlDeclaration node.

An XmlWriter method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message "An asynchronous operation is already in progress."


The following example copies all the elements to the output, changes the tag names to upper case, and copies all the attributes unchanged.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
void main()
   XmlReader^ reader = XmlReader::Create( L"test1.xml" );
   XmlWriterSettings^ settings = gcnew XmlWriterSettings;
   settings->Indent = true;
   XmlWriter^ writer = XmlWriter::Create( Console::Out );
   while ( reader->Read() )
      if ( reader->NodeType == XmlNodeType::Element )
         writer->WriteStartElement( reader->Name->ToUpper() );
         writer->WriteAttributes( reader, false );
         if ( reader->IsEmptyElement )
      if ( reader->NodeType == XmlNodeType::EndElement )

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

public class Sample {

  public static void Main() {
    XmlReader reader = XmlReader.Create("test1.xml");
    XmlWriterSettings settings = new XmlWriterSettings();
    settings.Indent = true;
    XmlWriter writer = XmlWriter.Create(Console.Out);

    while (reader.Read()) {
      if (reader.NodeType == XmlNodeType.Element) {
        writer.WriteAttributes(reader, false);
        if (reader.IsEmptyElement) writer.WriteEndElement();
      else if (reader.NodeType == XmlNodeType.EndElement) {
Option Strict
Option Explicit

Imports System
Imports System.IO
Imports System.Xml

Public Class Sample
  Public Shared Sub Main()

    Dim reader As XmlReader = XmlReader.Create("test1.xml")
    Dim settings As XmlWriterSettings = new XmlWriterSettings()
    settings.Indent = true
    Dim writer As XmlWriter = XmlWriter.Create(Console.Out)
      While reader.Read()
          If reader.NodeType = XmlNodeType.Element Then
              writer.WriteAttributes(reader, False)
              If reader.IsEmptyElement Then
              End If
              If reader.NodeType = XmlNodeType.EndElement Then
              End If
          End If
      End While

    End Sub 'Main
End Class 'Sample

The example uses the file, test1.xml, as input.

<test a="1" b="2">
    <item c="3" d="4" e="5" f="6"/>


If the reader is positioned on an element node WriteAttributes copies all the contained attributes. If the reader is positioned on an attribute node, this method writes the current attribute, then the rest of the attributes until the element closing tag. If the reader is positioned on an XmlDeclaration node, this method writes all the attributes in the declaration. If the reader is positioned on any other node type this method throws an XmlException.

If this method is called using XmlValidatingReader, to ensure well-formed XML any content (which has been expanded from the entities) that could result in an invalid document is replaced when written. For example, if an attribute includes an &gt; entity that has been expanded, to ensure a well-formed document the expanded > is replaced when written out with &gt;.

For the asynchronous version of this method, see WriteAttributesAsync.

Applies to