Provides data for the GridControl.CustomUnboundColumnData event.
The GridControl.CustomUnboundColumnData event allows you to populate unbound columns with data and save the modified data in the unbound columns back to the data source.
The GridColumnDataEventArgs.IsGetData and GridColumnDataEventArgs.IsSetData properties can be used to determine whether the event handler should provide data for or save data from an unbound column. The unbound column currently being processed is determined by the GridColumnDataEventArgs.Column property. To get the data of the currently processed row or assign a value to any field in this row, use the GridColumnDataEventArgs.RowData or GridColumnDataEventArgs.EditableRowData property.