When used with a data-virtualized (asynchronous) source, this property will always return null.
Example
For more information and examples on selecting data, refer to the Selecting Data topic.
Requirements
Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2