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XmlReader.IsDefault Property

When overridden in a derived class, gets a value indicating whether the current node is an attribute that was generated from the default value defined in the DTD or schema.

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

public virtual bool IsDefault { get; }
/** @property */
public boolean get_IsDefault ()

public function get IsDefault () : boolean

Property Value

true if the current node is an attribute whose value was generated from the default value defined in the DTD or schema; false if the attribute value was explicitly set.

IsDefault always returns false for implementations of XmlReader that do not support schema or DTD information. This property applies only to an attribute node.

The following example displays all attributes on the root element.

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

public class Sample 
{
  public static void Main(){

    // Create the reader.
    XmlReader reader = XmlReader.Create("book4.xml");

    reader.MoveToContent();

    // Display each of the attribute nodes, including default attributes.
    while (reader.MoveToNextAttribute()){
        if (reader.IsDefault)
          Console.Write("(default attribute) ");
        Console.WriteLine("{0} = {1}", reader.Name, reader.Value);  
    }           
  
    //Close the reader.
    reader.Close();     
  
  }
} // End class

The example uses the following files as input.

book4.xml

<!DOCTYPE book SYSTEM 'book.dtd'>
<book ISBN = '1-861001-57-5'>
  <title>Pride And Prejudice</title>
  <price>19.95</price>
</book>

book.dtd

<!ELEMENT book (title,price)> 
<!ATTLIST book 
   genre CDATA "novel"
   ISBN CDATA #REQUIRED>
<!ELEMENT title (#PCDATA)>
<!ELEMENT price (#PCDATA)>

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

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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