ExecuteAction is called automatically when the user invokes an action with the DB grid as its target. The Action parameter specifies the action that was invoked. ExecuteAction returns a boolean value indicating whether the action was successfully executed. 

ExecuteAction first calls the inherited method, which checks whether the action knows how to execute with the grid as a target. If this does not successfully dispatch the action, ExecuteAction attempts to invoke the action with the grid's associated dataset as a target. 

Execute 

DataSource