IHasXmlNode 接口

定义

命名空间:

System.Xml

程序集:

System.Xml.ReaderWriter.dll

使类可以从当前上下文或位置返回 XmlNode。

public interface class IHasXmlNode

public interface IHasXmlNode

type IHasXmlNode = interface

Public Interface IHasXmlNode

示例

以下示例使用 GetNode 方法来检索和修改所选节点。

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::XPath;
int main()
{
   XmlDocument^ doc = gcnew XmlDocument;
   doc->Load( "books.xml" );
   
   // Create an XPathNavigator and select all books by Plato.
   XPathNavigator^ nav = doc->CreateNavigator();
   XPathNodeIterator^ ni = nav->Select("descendant::book[author/name='Plato']");
   ni->MoveNext();
   
   // Get the first matching node and change the book price.
   XmlNode^ book = dynamic_cast<IHasXmlNode^>(ni->Current)->GetNode();
   book->LastChild->InnerText = "12.95";
   Console::WriteLine( book->OuterXml );
}

using System;
using System.IO;
using System.Xml;
using System.Xml.XPath;

public class Sample
{
  public static void Main()
  {
     XmlDocument doc = new XmlDocument();
     doc.Load("books.xml");

     // Create an XPathNavigator and select all books by Plato.
     XPathNavigator nav = doc.CreateNavigator();
     XPathNodeIterator ni = nav.Select("descendant::book[author/name='Plato']");
     ni.MoveNext();

     // Get the first matching node and change the book price.
     XmlNode book = ((IHasXmlNode)ni.Current).GetNode();
     book.LastChild.InnerText = "12.95";
     Console.WriteLine(book.OuterXml);
  }
}

Imports System.IO
Imports System.Xml
Imports System.Xml.XPath

public class Sample

  public shared sub Main()

     Dim doc as XmlDocument = new XmlDocument()
     doc.Load("books.xml")
                         
     ' Create an XPathNavigator and select all books by Plato.
     Dim nav as XPathNavigator = doc.CreateNavigator()
     Dim ni as XPathNodeIterator = nav.Select("descendant::book[author/name='Plato']")
     ni.MoveNext()

     ' Get the first matching node and change the book price.
     Dim book as XmlNode = CType(ni.Current, IHasXmlNode).GetNode()
     book.LastChild.InnerText = "12.95"
     Console.WriteLine(book.OuterXml)
    
  end sub
end class

该示例使用 文件 books.xml 作为输入。

<bookstore>
  <book genre="autobiography" publicationdate="1981" 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" 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" ISBN="1-861001-57-6">
    <title>The Gorgias</title>
    <author>
      <name>Plato</name>
    </author>
    <price>9.99</price>
  </book>
</bookstore>

注解

接口 IHasXmlNode 提供一个接口，使类能够从当前上下文或位置返回 XmlNode 。 它由 XPathNavigator 在具有 XmlNode 节点的类上运行的对象实现。 例如，如果 XPathNavigator 对象是由 XmlDocument创建的，则可以使用 GetNode 方法返回 XmlNode 表示导航器当前位置的 。

方法

GetNode()

返回当前位置的 XmlNode。