XmlReader.ReadToDescendant Method (String)


Advances the XmlReader to the next descendant element with the specified qualified name.

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

Public Overridable Function ReadToDescendant (
	name As String
) As Boolean


Type: System.String

The qualified name of the element you wish to move to.

Return Value

Type: System.Boolean

true if a matching descendant element is found; otherwise false. If a matching child element is not found, the XmlReader is positioned on the end tag (NodeType is XmlNodeType.EndElement) of the element.

If the XmlReader is not positioned on an element when ReadToDescendant was called, this method returns false and the position of the XmlReader is not changed.

Exception Condition

An XmlReader 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 parameter is an empty string.

The following example parses the second book node.

Using reader As XmlReader = XmlReader.Create("2books.xml")

  ' Move the reader to the second book node.
  reader.Skip() 'Skip the first book.
  ' Parse the file starting with the second book node.
    Select Case reader.NodeType
      Case XmlNodeType.Element
        Console.Write("<{0}", reader.Name)
        While reader.MoveToNextAttribute()
            Console.Write(" {0}='{1}'", reader.Name, reader.Value)
        End While
      Case XmlNodeType.Text
      Case XmlNodeType.EndElement
        Console.Write("</{0}>", reader.Name)
    End Select
  Loop While reader.Read()

End Using

The example uses the file, 2books.xml, as input.

<!--sample XML fragment-->
  <book genre='novel' ISBN='10-861003-324'>
    <title>The Handmaid's Tale</title>
  <book genre='novel' ISBN='1-861001-57-5'>
    <title>Pride And Prejudice</title>

Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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