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XPathNavigator.ReplaceRange(XPathNavigator) Metodo

Definizione

Sostituisce un intervallo di nodi di pari livello dal nodo corrente per il nodo specificato.

public:
 virtual System::Xml::XmlWriter ^ ReplaceRange(System::Xml::XPath::XPathNavigator ^ lastSiblingToReplace);
public virtual System.Xml.XmlWriter ReplaceRange (System.Xml.XPath.XPathNavigator lastSiblingToReplace);
abstract member ReplaceRange : System.Xml.XPath.XPathNavigator -> System.Xml.XmlWriter
override this.ReplaceRange : System.Xml.XPath.XPathNavigator -> System.Xml.XmlWriter
Public Overridable Function ReplaceRange (lastSiblingToReplace As XPathNavigator) As XmlWriter

Parametri

lastSiblingToReplace
XPathNavigator

Oggetto XPathNavigator posizionato in corrispondenza dell'ultimo nodo di pari livello nell'intervallo da sostituire.

Restituisce

XmlWriter

Oggetto XmlWriter usato per specificare l'intervallo della sostituzione.

Eccezioni

L'oggetto XPathNavigator specificato è null.

XPathNavigator non supporta la modifica.

L'ultimo nodo specificato da sostituire non è un nodo di pari livello valido del nodo corrente.

Esempio

Nell'esempio seguente, i primi e i secondi book elementi del contosoBooks.xml file vengono sostituiti con un nuovo elemento vuoto book usando il ReplaceRange metodo .

XmlDocument^ document = gcnew XmlDocument();
document->Load("contosoBooks.xml");
XPathNavigator^ navigator = document->CreateNavigator();

XmlNamespaceManager^ manager = gcnew XmlNamespaceManager(document->NameTable);
manager->AddNamespace("bk", "http://www.contoso.com/books");

XPathNavigator^ first = navigator->SelectSingleNode("/bk:bookstore/bk:book[1]", manager);
XPathNavigator^ last = navigator->SelectSingleNode("/bk:bookstore/bk:book[2]", manager);

navigator->MoveTo(first);
XmlWriter^ newRange = navigator->ReplaceRange(last);
newRange->WriteStartElement("book");
    newRange->WriteAttributeString("genre", "");
    newRange->WriteAttributeString("publicationdate", "2005-04-07");
    newRange->WriteAttributeString("ISBN", "0");
    newRange->WriteStartElement("title");
        newRange->WriteString("New Book");
    newRange->WriteEndElement();
    newRange->WriteStartElement("author");
        newRange->WriteStartElement("first-name");
            newRange->WriteString("First Name");
        newRange->WriteEndElement();
        newRange->WriteStartElement("last-name");
            newRange->WriteString("Last Name");
        newRange->WriteEndElement();
    newRange->WriteEndElement();
    newRange->WriteElementString("price", "$0.00");
newRange->WriteEndElement();
newRange->Close();
Console::WriteLine(navigator->OuterXml);
XmlDocument document = new XmlDocument();
document.Load("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();

XmlNamespaceManager manager = new XmlNamespaceManager(document.NameTable);
manager.AddNamespace("bk", "http://www.contoso.com/books");

XPathNavigator first = navigator.SelectSingleNode("/bk:bookstore/bk:book[1]", manager);
XPathNavigator last = navigator.SelectSingleNode("/bk:bookstore/bk:book[2]", manager);

navigator.MoveTo(first);
XmlWriter newRange = navigator.ReplaceRange(last);
newRange.WriteStartElement("book");
newRange.WriteAttributeString("genre", "");
newRange.WriteAttributeString("publicationdate", "2005-04-07");
newRange.WriteAttributeString("ISBN", "0");
newRange.WriteStartElement("title");
newRange.WriteString("New Book");
newRange.WriteEndElement();
newRange.WriteStartElement("author");
newRange.WriteStartElement("first-name");
newRange.WriteString("First Name");
newRange.WriteEndElement();
newRange.WriteStartElement("last-name");
newRange.WriteString("Last Name");
newRange.WriteEndElement();
newRange.WriteEndElement();
newRange.WriteElementString("price", "$0.00");
newRange.WriteEndElement();
newRange.Close();
Console.WriteLine(navigator.OuterXml);
Dim document As XmlDocument = New XmlDocument()
document.Load("contosoBooks.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

Dim manager As XmlNamespaceManager = New XmlNamespaceManager(document.NameTable)
manager.AddNamespace("bk", "http://www.contoso.com/books")

Dim first As XPathNavigator = navigator.SelectSingleNode("/bk:bookstore/bk:book[1]", manager)
Dim last As XPathNavigator = navigator.SelectSingleNode("/bk:bookstore/bk:book[2]", manager)

navigator.MoveTo(first)
Dim newRange As XmlWriter = navigator.ReplaceRange(last)
newRange.WriteStartElement("book")
newRange.WriteAttributeString("genre", "")
newRange.WriteAttributeString("publicationdate", "2005-04-07")
newRange.WriteAttributeString("ISBN", "0")
newRange.WriteStartElement("title")
newRange.WriteString("New Book")
newRange.WriteEndElement()
newRange.WriteStartElement("author")
newRange.WriteStartElement("first-name")
newRange.WriteString("First Name")
newRange.WriteEndElement()
newRange.WriteStartElement("last-name")
newRange.WriteString("Last Name")
newRange.WriteEndElement()
newRange.WriteEndElement()
newRange.WriteElementString("price", "$0.00")
newRange.WriteEndElement()
newRange.Close()
Console.WriteLine(navigator.OuterXml)

Nell'esempio il file contosoBooks.xml viene considerato come 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>  

Commenti

Il ReplaceRange metodo sostituisce un intervallo di nodi di pari livello dal nodo corrente in cui viene posizionato (inclusivo) al nodo XPathNavigator specificato dal XPathNavigator parametro (inclusivo).

Nota

L'intervallo di sostituzione non viene inserito finché non viene chiamato il Close metodo dell'oggetto XmlWriter .

Si applica a