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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();
  }
}


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


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


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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