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XmlWriter.WriteAttributes Method

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

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

public virtual void WriteAttributes(
	XmlReader reader,
	bool defattr
)

Parameters

reader
Type: System.Xml.XmlReader

The XmlReader from which to copy the attributes.

defattr
Type: System.Boolean

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

ExceptionCondition
ArgumentNullException

reader is null.

XmlException

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

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 > entity that has been expanded, to ensure a well-formed document the expanded > is replaced when written out with >.

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;
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.WriteStartElement(reader.Name.ToUpper());
        writer.WriteAttributes(reader, false);
        if (reader.IsEmptyElement) writer.WriteEndElement();
      }
      else if (reader.NodeType == XmlNodeType.EndElement) {
        writer.WriteEndElement();
      }
    }
    writer.Close();
    reader.Close();
  }
}
#using <mscorlib.dll>
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;

void main() {

    XmlReader* reader = XmlReader::Create(S"test1.xml");
    XmlWriterSettings* settings = new 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) writer->WriteEndElement();
      }
      else if (reader->NodeType == XmlNodeType::EndElement) {
        writer->WriteEndElement();
      }
    }
    writer->Close();
    reader->Close();
 };

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

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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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