XPathNavigator.SetTypedValue Method (Object)


Sets the typed value of the current node.

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

Public Overridable Sub SetTypedValue (
	typedValue As Object


Type: System.Object

The new typed value of the node.

Exception Condition

The XPathNavigator does not support the type of the object specified.


The value specified cannot be null.


The XPathNavigator is not positioned on an element or attribute node.


The XPathNavigator does not support editing.

When an XmlDocument object is created as the result of a schema validating XmlReader object, the value specified to the SetTypedValue method is verified against the XML Schema Definition Language (XSD) schema for the XML document. If the value specified is invalid according to the schema for the XML document, an XmlSchemaException is thrown.

The SetTypedValue method is valid only when the XPathNavigator is positioned on an element or attribute node.

In the following example, the SetTypedValue method is used to update all price elements in the contosoBooks.xml file using the XmlNamespaceManager object to resolve namespace prefixes in the XPath expression.

Dim settings As XmlReaderSettings = New XmlReaderSettings()
settings.Schemas.Add("http://www.contoso.com/books", "contosoBooks.xsd")
settings.ValidationType = ValidationType.Schema

Dim reader As XmlReader = XmlReader.Create("contosoBooks.xml", settings)
Dim document As XmlDocument = New XmlDocument()

Dim navigator As XPathNavigator = 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")

Dim price As New Decimal(19.99)


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>
    <book genre="novel" publicationdate="1967-11-17" ISBN="0-201-63361-2">
        <title>The Confidence Man</title>
    <book genre="philosophy" publicationdate="1991-02-15" ISBN="1-861001-57-6">
        <title>The Gorgias</title>

.NET Framework
Available since 2.0
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