Raises the BeforeGroupExpand event.
[Visual Basic] Overridable Protected Sub OnBeforeGroupExpand( _ ByVal e As DataGridViewGroupCancelEventArgs _ ) [C#] protected virtual void OnBeforeGroupExpand( DataGridViewGroupCancelEventArgs e ); [C++] protected: virtual void OnBeforeGroupExpand( DataGridViewGroupCancelEventArgs* e );
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The OnBeforeGroupExpand method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to Inheritors: When overriding OnBeforeGroupExpand in a derived class, be sure to call the base class's OnBeforeGroupExpand method so that registered delegates receive the event.
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows .NET Server family
DataGridView Class | DataGridView Members | Wimark.Controls Namespace