Sets input focus to the control.
public override void Focus()
An attempt was made to call the Focus method.
Because the HierarchicalDataSourceControl class has no visual rendering, calling the Focus method on it throws a NotSupportedException exception.
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)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.