Windows apps
Collapse the table of content
Expand the table of content
Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

XPathNavigator::SetTypedValue Method (Object^)

 

Sets the typed value of the current node.

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

public:
virtual void SetTypedValue(
	Object^ typedValue
)

Parameters

typedValue
Type: System::Object^

The new typed value of the node.

Exception Condition
ArgumentException

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

ArgumentNullException

The value specified cannot be null.

InvalidOperationException

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

NotSupportedException

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.

      XmlReaderSettings^ settings = gcnew XmlReaderSettings();
      settings->Schemas->Add("http://www.contoso.com/books", "contosoBooks.xsd");
settings->ValidationType = ValidationType::Schema;

      XmlReader^ reader = XmlReader::Create("contosoBooks.xml", settings);
      XmlDocument^ document = gcnew XmlDocument();
      document->Load(reader);

      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");

      Decimal^ price = gcnew Decimal(19.99);
      navigator->SetTypedValue(price);

      navigator->MoveToParent();
      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
Available since 2.0
Return to top
Show:
© 2017 Microsoft