Assembly: System.Web (in system.web.dll)
Property ValueThe key field value for the selected data list item. The default is a null reference (Nothing in Visual Basic), which indicates that no data list item is currently selected.
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.