Table of atomized string objects.
Assembly: System.Xml (in System.Xml.dll)
Thetype exposes the following members.
|Add(String)||When overridden in a derived class, atomizes the specified string and adds it to the XmlNameTable.|
|Add(Char(), Int32, Int32)||When overridden in a derived class, atomizes the specified string and adds it to the XmlNameTable.|
|Equals(Object)||Determines whether the specified object is equal to the current object. (Inherited from Object.)|
|Finalize||Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)|
|Get(String)||When overridden in a derived class, gets the atomized string containing the same value as the specified string.|
|Get(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.|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|ToString||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 atomized strings.
XmlNameTable is implemented in the NameTable class.
The following example compares two element names.
' 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()
.NET FrameworkSupported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
.NET for Windows Phone appsSupported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)