XPathNavigator.SetTypedValue(Object) Método

Definição

Define o valor tipado do nó atual.Sets the typed value of the current node.

public:
 virtual void SetTypedValue(System::Object ^ typedValue);
public virtual void SetTypedValue (object typedValue);
abstract member SetTypedValue : obj -> unit
override this.SetTypedValue : obj -> unit
Public Overridable Sub SetTypedValue (typedValue As Object)

Parâmetros

typedValue
Object

O novo valor tipado do nó.The new typed value of the node.

Exceções

O XPathNavigator não é compatível com o tipo do objeto especificado.The XPathNavigator does not support the type of the object specified.

O valor especificado não pode ser null.The value specified cannot be null.

O XPathNavigator não está posicionado em um nó de elemento ou de atributo.The XPathNavigator is not positioned on an element or attribute node.

O XPathNavigator não dá suporte à edição.The XPathNavigator does not support editing.

Exemplos

No exemplo a seguir, o SetTypedValue método é usado para atualizar todos os price elementos no contosoBooks.xml arquivo usando o XmlNamespaceManager objeto para resolver os prefixos de namespace na expressão XPath.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);
XmlReaderSettings settings = new XmlReaderSettings();
settings.Schemas.Add("http://www.contoso.com/books", "contosoBooks.xsd");
settings.ValidationType = ValidationType.Schema;

XmlReader reader = XmlReader.Create("contosoBooks.xml", settings);
XmlDocument document = new 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 = 19.99M;
navigator.SetTypedValue(price);

navigator.MoveToParent();
Console.WriteLine(navigator.OuterXml);
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()
document.Load(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")

Dim price As New Decimal(19.99)
navigator.SetTypedValue(price)

navigator.MoveToParent()
Console.WriteLine(navigator.OuterXml)

O exemplo usa o arquivo contosoBooks.xml como entrada.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>  

Comentários

Quando um XmlDocument objeto é criado como resultado de um objeto de validação de esquema XmlReader , o valor especificado para o SetTypedValue método é verificado em relação ao esquema XSD (linguagem de definição de esquema XML) para o documento XML.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. Se o valor especificado for inválido de acordo com o esquema para o documento XML, um XmlSchemaException será gerado.If the value specified is invalid according to the schema for the XML document, an XmlSchemaException is thrown.

O SetTypedValue método é válido somente quando o XPathNavigator está posicionado em um nó de elemento ou de atributo.The SetTypedValue method is valid only when the XPathNavigator is positioned on an element or attribute node.

Aplica-se a