XmlNameTable 类

定义

public ref class XmlNameTable abstract

public abstract class XmlNameTable

type XmlNameTable = class

Public MustInherit Class XmlNameTable

继承

Object

XmlNameTable

派生

System.Xml.NameTable

示例

以下示例比较两个元素名称。

// Add the element names to the NameTable.
NameTable nt = new NameTable();
object book = nt.Add("book");
object title = nt.Add("title");

 // Create a reader that uses the NameTable.
 XmlReaderSettings settings = new XmlReaderSettings();
 settings.NameTable = nt;
 XmlReader reader = XmlReader.Create("books.xml", settings);

 while (reader.Read()) {
    if (reader.NodeType == XmlNodeType.Element) {
      // Cache the local name to prevent multiple calls to the LocalName property.
      object localname = reader.LocalName;

      // Do a comparison between the object references. This just compares pointers.
      if (book == localname) {
          // Add additional processing here.
      }
      // Do a comparison between the object references. This just compares pointers.
      if (title == localname) {
         // Add additional processing here.
      }
    }
 }  // End While

// Close the reader.
reader.Close();

' Add the element names to the NameTable.
Dim nt As New NameTable()
Dim book As Object = nt.Add("book")
Dim title As Object = nt.Add("title")

' Create a reader that uses the NameTable.
Dim settings As New XmlReaderSettings()
settings.NameTable = nt
Dim reader As XmlReader = XmlReader.Create("books.xml", settings)

While reader.Read()
    If reader.NodeType = XmlNodeType.Element Then
        ' Cache the local name to prevent multiple calls to the LocalName property.
        Dim localname As Object = reader.LocalName
        
        ' Do a comparison between the object references. This just compares pointers.
        If book Is localname Then
           ' Add additional processing here.
        End If 
        ' Do a comparison between the object references. This just compares pointers.
        If title Is localname Then
           ' Add additional processing here.
        End If 
    End If
End While 

' Close the reader.
reader.Close()

注解

多个类（如 XmlDocument 和 XmlReader）在内部使用 XmlNameTable 类来存储属性和元素名称。 当 XML 文档中多次出现某个元素名或属性名时，该名称在 XmlNameTable 中只存储一次。

这些名称存储为公共语言运行时 (CLR) 对象类型。 这使您能够对这些字符串进行对象比较，而不是开销更大的字符串比较。 这些字符串对象称为“原子化字符串”。

XmlNameTable 在 类中 NameTable 实现。

构造函数

方法

适用于

另请参阅

• NameTable