XPathNavigator.ReplaceRange(XPathNavigator) Metodo

Definizione

Spazio dei nomi:
System.Xml.XPath
Assembly:
netstandard.dll, System.Xml.ReaderWriter.dll
Assembly:
System.Xml.XPath.dll
Assembly:
System.Xml.ReaderWriter.dll
Assembly:
System.Xml.dll
Assembly:
netstandard.dll
Origine:
XPathNavigator.cs
Origine:
XPathNavigator.cs
Origine:
XPathNavigator.cs
Origine:
XPathNavigator.cs
Origine:
XPathNavigator.cs

Sostituisce un intervallo di nodi di pari livello dal nodo corrente al 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 sull'ultimo nodo di pari livello nell'intervallo da sostituire.

Valori restituiti

XmlWriter

Oggetto XmlWriter utilizzato per specificare l'intervallo di sostituzione.

Eccezioni

ArgumentNullException

L'oggetto XPathNavigator specificato è null.

NotSupportedException

l'oggetto XPathNavigator non supporta la modifica.

InvalidOperationException

L'ultimo nodo da sostituire specificato 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 = 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)

L'esempio accetta il contosoBooks.xml file 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 XPathNavigator corrente su (inclusivo) al nodo specificato dal XPathNavigator parametro (inclusivo).

Note

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

Si applica a