Immediate Mode

Immediate mode is in effect when the LockType property is set to adLockOptimistic or adLockPessimistic. In immediate mode, changes to a record are propagated to the data source as soon as you declare the work on a row complete by calling the Update method.

Calling Update

If you move from the record you are adding or editing before calling the Update method, ADO will automatically call Update to save the changes. You must call the CancelUpdate method before navigation if you want to cancel any changes made to the current record or discard a newly added record.

The current record remains current after you call the Update method.

CancelUpdate

Use the CancelUpdate method to cancel any changes made to the current row or to discard a newly added row. You cannot cancel changes to the current row or a new row after you call the Update method, unless the changes are either part of a transaction that you can roll back with the RollbackTrans method or part of a batch update. In the case of a batch update, you can cancel the Update with the CancelUpdate or CancelBatch method.

If you are adding a new row when you call the CancelUpdate method, the current row becomes the row that was current before the AddNew call.

If you have not changed the current row or added a new row, calling the CancelUpdate method generates an error.