XmlNamedNodeMap.GetNamedItem 方法

定义

XmlNode 中节点的集合检索指定的 XmlNamedNodeMapRetrieves the specified XmlNode from the collection of nodes in the XmlNamedNodeMap.

重载

GetNamedItem(String)

检索通过名称指定的 XmlNodeRetrieves an XmlNode specified by name.

GetNamedItem(String, String)

检索具有匹配的 LocalNameNamespaceURI 的节点。Retrieves a node with the matching LocalName and NamespaceURI.

GetNamedItem(String)

检索通过名称指定的 XmlNodeRetrieves an XmlNode specified by name.

public:
 virtual System::Xml::XmlNode ^ GetNamedItem(System::String ^ name);
public virtual System.Xml.XmlNode GetNamedItem (string name);
public virtual System.Xml.XmlNode? GetNamedItem (string name);
abstract member GetNamedItem : string -> System.Xml.XmlNode
override this.GetNamedItem : string -> System.Xml.XmlNode
Public Overridable Function GetNamedItem (name As String) As XmlNode

参数

name
String

要检索节点的限定名。The qualified name of the node to retrieve. 它针对匹配节点的 Name 属性进行匹配。It is matched against the Name property of the matching node.

返回

XmlNode

具有指定名称的 XmlNode;如果未找到匹配节点,则为 nullAn XmlNode with the specified name or null if a matching node is not found.

示例

下面的示例使用 XmlAttributeCollection 从) 继承的类 (XmlNamedNodeMap 来修改属性。The following example uses the XmlAttributeCollection class (which inherits from XmlNamedNodeMap) to modify an attribute.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlDocument^ doc = gcnew XmlDocument;
   doc->LoadXml( "<book genre='novel' publicationdate='1997'>   <title>Pride And Prejudice</title></book>" );
   XmlAttributeCollection^ attrColl = doc->DocumentElement->Attributes;
   
   // Change the value for the genre attribute.
   XmlAttribute^ attr = dynamic_cast<XmlAttribute^>(attrColl->GetNamedItem( "genre" ));
   attr->Value = "fiction";
   Console::WriteLine( "Display the modified XML..." );
   Console::WriteLine( doc->OuterXml );
}

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

public class Sample
{
  public static void Main()
  {
     XmlDocument doc = new XmlDocument();
     doc.LoadXml("<book genre='novel' publicationdate='1997'> " +
                 "  <title>Pride And Prejudice</title>" +
                 "</book>");

     XmlAttributeCollection attrColl = doc.DocumentElement.Attributes;

     // Change the value for the genre attribute.
     XmlAttribute attr = (XmlAttribute)attrColl.GetNamedItem("genre");
     attr.Value = "fiction";

     Console.WriteLine("Display the modified XML...");
     Console.WriteLine(doc.OuterXml);
  }
}
Imports System.IO
Imports System.Xml

public class Sample

  public shared sub Main()

    Dim doc as XmlDocument = new XmlDocument()
    doc.LoadXml("<book genre='novel' publicationdate='1997'> " & _
                "  <title>Pride And Prejudice</title>" & _
                "</book>")
                         
    Dim attrColl as XmlAttributeCollection = doc.DocumentElement.Attributes

    ' Change the value for the genre attribute.
    Dim attr as XmlAttribute = CType(attrColl.GetNamedItem("genre"),XmlAttribute)
    attr.Value = "fiction"

    Console.WriteLine("Display the modified XML...")
    Console.WriteLine(doc.OuterXml)
    
  end sub
end class

适用于

GetNamedItem(String, String)

检索具有匹配的 LocalNameNamespaceURI 的节点。Retrieves a node with the matching LocalName and NamespaceURI.

public:
 virtual System::Xml::XmlNode ^ GetNamedItem(System::String ^ localName, System::String ^ namespaceURI);
public virtual System.Xml.XmlNode GetNamedItem (string localName, string namespaceURI);
public virtual System.Xml.XmlNode? GetNamedItem (string localName, string? namespaceURI);
abstract member GetNamedItem : string * string -> System.Xml.XmlNode
override this.GetNamedItem : string * string -> System.Xml.XmlNode
Public Overridable Function GetNamedItem (localName As String, namespaceURI As String) As XmlNode

参数

localName
String

要检索的节点的本地名称。The local name of the node to retrieve.

namespaceURI
String

要检索的节点的命名空间统一资源标识符 (URI)。The namespace Uniform Resource Identifier (URI) of the node to retrieve.

返回

XmlNode

具有匹配的本地名称和命名空间 URI 的 XmlNode;如果未找到匹配节点,则为 nullAn XmlNode with the matching local name and namespace URI or null if a matching node was not found.

适用于