XPathNavigator.DeleteRange(XPathNavigator) Método

Definição

Namespace:

System.Xml.XPath

Assembly:

System.Xml.ReaderWriter.dll

Assembly:

System.Xml.XPath.dll

Assembly:

System.Xml.dll

Assembly:

netstandard.dll

Exclui um intervalo de nós irmãos do nó atual para o nó especificado.

public:
 virtual void DeleteRange(System::Xml::XPath::XPathNavigator ^ lastSiblingToDelete);

public virtual void DeleteRange (System.Xml.XPath.XPathNavigator lastSiblingToDelete);

abstract member DeleteRange : System.Xml.XPath.XPathNavigator -> unit
override this.DeleteRange : System.Xml.XPath.XPathNavigator -> unit

Public Overridable Sub DeleteRange (lastSiblingToDelete As XPathNavigator)

Parâmetros

lastSiblingToDelete

XPathNavigator

Um XPathNavigator posicionado no último nó irmão no intervalo a ser excluído.

Exceções

ArgumentNullException

O XPathNavigator especificado é null.

NotSupportedException

O XPathNavigator não dá suporte à edição.

InvalidOperationException

O último nó a excluir especificado não é um nó irmão válido do nó atual.

Exemplos

No exemplo a seguir, o primeiro e o segundo book elementos do contosoBooks.xml arquivo são excluídos usando o DeleteRange método.

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);
navigator->DeleteRange(last);
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);
navigator.DeleteRange(last);
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)
navigator.DeleteRange(last)
Console.WriteLine(navigator.OuterXml)

O exemplo usa o arquivo contosoBooks.xml como entrada.

<?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

O DeleteRange método exclui um intervalo de nós irmãos do nó atual no qual ele XPathNavigator está posicionado (inclusive) para o nó especificado pelo XPathNavigator parâmetro (inclusive). Em XPathNavigator seguida, ele é posicionado em seu nó pai.