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Método XPathNavigator.DeleteSelf ()

 

Publicado: octubre de 2016

Elimina el nodo actual y sus nodos secundarios.

Espacio de nombres:   System.Xml.XPath
Ensamblado:  System.Xml (en System.Xml.dll)

public virtual void DeleteSelf()

Exception Condition
InvalidOperationException

XPathNavigator está colocado en un nodo que no se puede eliminar, como el nodo raíz o un nodo de espacio de nombres.

NotSupportedException

XPathNavigator no admite la edición.

  • The T:System.Xml.XPath.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 P:System.Xml.XPath.XPathNavigator.XmlType, P:System.Xml.XPath.XPathNavigator.ValueType and P:System.Xml.XPath.XPathNavigator.TypedValue properties have the values null, T:System.String and F:System.String.Empty respectively.

  • Deleted nodes are still accessible to T:System.Xml.XPath.XPathNavigator objects positioned over them prior to deletion. However methods that attempt to move away from the deleted sub-tree fail. For example, the M:System.Xml.XPath.XPathNavigator.MoveToParent and M:System.Xml.XPath.XPathNavigator.MoveToPrevious methods always fail when the T:System.Xml.XPath.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 Overload:System.Xml.XPath.XPathNavigator.MoveToNext method always fails if the T:System.Xml.XPath.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 M:System.Xml.XPath.XPathNavigator.DeleteSelf method. The position of the T:System.Xml.XPath.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.


<?xml version="1.0" encoding="utf-8" ?>
<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>

.NET Framework
Disponible desde 2.0
Silverlight
Disponible desde 4.0
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