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XmlValidatingReader.IsDefault Property

Gets a value indicating whether the current node is an attribute that was generated from the default value defined in the document type definition (DTD) or schema.

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

public override bool IsDefault { get; }

Property Value

Type: System.Boolean
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.

This property applies only to an attribute node.

NoteNote

The XmlValidatingReader class is obsolete in .NET Framework 2.0. You can create a validating XmlReader instance by using the XmlReaderSettings class and the Create method. For more information, see the Remarks section of the XmlReader reference page.

The following example displays all attributes nodes on the root element.

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

public class Sample 
{
  public static void Main(){

    //Create the reader.
    XmlTextReader txtreader = new XmlTextReader("book4.xml");
    XmlValidatingReader reader = new XmlValidatingReader(txtreader);

    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)>

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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