XPathNavigator.DeleteSelf Method

Deletes the current node and its child nodes.

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

public virtual void DeleteSelf ()
public void DeleteSelf ()
public function DeleteSelf ()
Not applicable.

Exception typeCondition

InvalidOperationException

The XPathNavigator is positioned on a node that cannot be deleted such as the root node or a namespace node.

NotSupportedException

The XPathNavigator does not support editing.

  • The XPathNavigator is positioned on the deleted node's parent node on successful deletion.

  • If the deleted node is a text node which is the content of a simple typed element, the element loses its type information. This means that when positioned on the element the XmlType, ValueType and TypedValue properties have the values a null reference (Nothing in Visual Basic), String and Empty respectively.

  • Deleted nodes are still accessible to XPathNavigator objects positioned over them prior to deletion. However methods that attempt to move away from the deleted sub-tree fail. For example, the MoveToParent and MoveToPrevious methods always fail when the XPathNavigator is positioned over the top most deleted node. This is because the deleted node is no longer connected to the XML document. Similarly the MoveToNext method always fails if the XPathNavigator is positioned on the bottom-most deleted node.

In the following example the price element of the first book element of the contosoBooks.xml file is deleted using the DeleteSelf method. The position of the XPathNavigator object after the price element is deleted is on the parent book element.

XmlDocument document = new XmlDocument();
document.Load("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();

navigator.MoveToChild("bookstore", "http://www.contoso.com/books");
navigator.MoveToChild("book", "http://www.contoso.com/books");
navigator.MoveToChild("price", "http://www.contoso.com/books");

navigator.DeleteSelf();

Console.WriteLine("Position after delete: {0}", navigator.Name);
Console.WriteLine(navigator.OuterXml);

The example takes the contosoBooks.xml file as an input.

<bookstore xmlns="http://www.contoso.com/books">
    <book genre="autobiography" publicationdate="1981-03-22" ISBN="1-861003-11-0">
        <title>The Autobiography of Benjamin Franklin</title>
        <author>
            <first-name>Benjamin</first-name>
            <last-name>Franklin</last-name>
        </author>
        <price>8.99</price>
    </book>
    <book genre="novel" publicationdate="1967-11-17" ISBN="0-201-63361-2">
        <title>The Confidence Man</title>
        <author>
            <first-name>Herman</first-name>
            <last-name>Melville</last-name>
        </author>
        <price>11.99</price>
    </book>
    <book genre="philosophy" publicationdate="1991-02-15" ISBN="1-861001-57-6">
        <title>The Gorgias</title>
        <author>
            <name>Plato</name>
        </author>
        <price>9.99</price>
    </book>
</bookstore>

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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