XmlNameTable Class

 

Table of atomized string objects.

Namespace:   System.Xml
Assembly:  System.Xml (in System.Xml.dll)

System.Object
  System.Xml.XmlNameTable
    System.Xml.NameTable

public abstract class XmlNameTable

NameDescription
System_CAPS_protmethodXmlNameTable()

Initializes a new instance of the XmlNameTable class.

NameDescription
System_CAPS_pubmethodAdd(Char[], Int32, Int32)

When overridden in a derived class, atomizes the specified string and adds it to the XmlNameTable.

System_CAPS_pubmethodAdd(String)

When overridden in a derived class, atomizes the specified string and adds it to the XmlNameTable.

System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGet(Char[], Int32, Int32)

When overridden in a derived class, gets the atomized string containing the same characters as the specified range of characters in the given array.

System_CAPS_pubmethodGet(String)

When overridden in a derived class, gets the atomized string containing the same value as the specified string.

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

Several classes, such as XmlDocument and XmlReader, use the XmlNameTable class internally to store attribute and element names. When an element or attribute name occurs multiple times in an XML document, it is stored only once in the XmlNameTable.

The names are stored as common language runtime (CLR) object types. This enables you to do object comparisons on these strings rather than a more expensive string comparison. These string objects are referred to as atomizedstrings.

XmlNameTable is implemented in the NameTable class.

The following example compares two element names.


// 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();     

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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