Occurs before a grouping operation is started.
public event EventHandler StartGrouping
Public Event StartGrouping As EventHandler
The StartGrouping event handler receives an argument of the EventArgs type.
Each time the grid's data is grouped or ungrouped by a column, the grid does the following:
Since data grouping requires sorting, the GridControl.StartSorting and GridControl.EndSorting events are also raised before and after grouping.