objectdatasource and server side validation

[Gabriel P G]

What´s the standard mechanism used for server-side validation when using a objectdatasource control? Do you validate on your Page_Load event? If so, how do you signal the objectdatasource control to not propagate the Insert/Update/Delete event? All of the examples i´ve found show how you can bind to the control and perform a CRUD operation with data that´s not validated and that is not expected to fail. thanks Gabriel