XPathNavigator.ValueType Propriété

public:
 virtual property Type ^ ValueType { Type ^ get(); };

public override Type ValueType { get; }

member this.ValueType : Type

Public Overrides ReadOnly Property ValueType As Type

Valeur de propriété

Type

.NET Type du nœud actuel. La valeur par défaut est String.

Exemples

Dans l’exemple suivant, le contosoBooks.xml schéma XSD (Xml Schema Definition Language) et contosoBooks.xsd le fichier XML sont utilisés pour créer un XPathNavigator objet. La valeur typée de l’élément price s’affiche à l’aide de la ValueType propriété, puis retournée en tant que chaîne à l’aide de la ValueAs méthode.

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

// Create an XmlReader object with the contosoBooks.xml file and its schema.
XmlReader^ reader = XmlReader::Create("contosoBooks.xml", settings);

XPathDocument^ document = gcnew XPathDocument(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");

// Display the current type of the price element.
Console::WriteLine(navigator->ValueType);

// Get the value of the price element as a string and display it.
String^ price = dynamic_cast<String^>(navigator->ValueAs(String::typeid));
Console::WriteLine(price);

// Create an XmlReaderSettings object with the contosoBooks.xsd schema.
XmlReaderSettings settings = new XmlReaderSettings();
settings.Schemas.Add("http://www.contoso.com/books", "contosoBooks.xsd");
settings.ValidationType = ValidationType.Schema;

// Create an XmlReader object with the contosoBooks.xml file and its schema.
XmlReader reader = XmlReader.Create("contosoBooks.xml", settings);

XPathDocument document = new XPathDocument(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");

// Display the current type of the price element.
Console.WriteLine(navigator.ValueType);

// Get the value of the price element as a string and display it.
string price = navigator.ValueAs(typeof(string)) as string;
Console.WriteLine(price);

' Create an XmlReaderSettings object with the contosoBooks.xsd schema.
Dim settings As XmlReaderSettings = New XmlReaderSettings()
settings.Schemas.Add("http://www.contoso.com/books", "contosoBooks.xsd")
settings.ValidationType = ValidationType.Schema

' Create an XmlReader object with the contosoBooks.xml file and its schema.
Dim reader As XmlReader = XmlReader.Create("contosoBooks.xml", settings)

Dim document As XPathDocument = New XPathDocument(reader)
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")

' Display the current type of the price element.
Console.WriteLine(navigator.ValueType)

' Get the value of the price element as a string and display it.
Dim price As String = navigator.ValueAs(GetType(String))
Console.WriteLine(price)

L'exemple prend le fichier contosoBooks.xml comme entrée.

<?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>  

L'exemple prend également le fichier contosoBooks.xsd comme entrée.

<?xml version="1.0" encoding="utf-8"?>  
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.contoso.com/books" xmlns:xs="http://www.w3.org/2001/XMLSchema">  
    <xs:element name="bookstore">  
        <xs:complexType>  
            <xs:sequence>  
                <xs:element maxOccurs="unbounded" name="book">  
                    <xs:complexType>  
                        <xs:sequence>  
                            <xs:element name="title" type="xs:string" />  
                            <xs:element name="author">  
                                <xs:complexType>  
                                    <xs:sequence>  
                                        <xs:element minOccurs="0" name="name" type="xs:string" />  
                                        <xs:element minOccurs="0" name="first-name" type="xs:string" />  
                                        <xs:element minOccurs="0" name="last-name" type="xs:string" />  
                                    </xs:sequence>  
                                </xs:complexType>  
                            </xs:element>  
                            <xs:element name="price" type="xs:decimal" />  
                        </xs:sequence>  
                        <xs:attribute name="genre" type="xs:string" use="required" />  
                        <xs:attribute name="publicationdate" type="xs:date" use="required" />  
                        <xs:attribute name="ISBN" type="xs:string" use="required" />  
                    </xs:complexType>  
                </xs:element>  
            </xs:sequence>  
        </xs:complexType>  
    </xs:element>  
</xs:schema>  

Remarques

La ValueType propriété obtient le .NET Type de la valeur typée du nœud actuel.

Par exemple, un élément de type xs:int aurait une ValueType valeur Int32 par défaut. Toutefois, il ValueType peut s’agir d’un des types valides qui peuvent être mappés à xs:int tels que Int16 ou Double.

Si un nœud n’a aucun type, cela équivaut à l’annotation de type sur le nœud en cours xdt:untypedAtomic. Dans ce cas, la ValueType propriété retourne une chaîne pour le nœud. Pour plus d’informations, consultez La prise en charge des types dans les classes System.Xml.

S’applique à