Eventi ADO WillChangeRecordset e RecordsetChangeComplete
❮ Riferimento completo dell'oggetto Recordset
L'evento WillChangeRecordset
L'evento WillChangeRecordset viene attivato prima che un'operazione modifichi il recordset.
Nota: prima che questo evento si ripresenti, imposta il parametro status su adStatusCancel per annullare l'operazione che ha causato questo evento o impostalo su adStatusUnwantedEvent per evitare notifiche successive.
L'evento RecordsetChangeComplete
L'evento RecordsetChangeComplete viene attivato dopo la modifica di un Recordset.
Nota: prima che questo evento si ripresenti, imposta il parametro status su adStatusUnwantedEvent per evitare notifiche successive.
Nota: l'evento WillChangeRecordset e RecordsetChangeComplete può verificarsi quando si chiama il metodo Requery o il metodo Open di un oggetto Recordset.
Sintassi
WillChangeRecord reason,status,objRs
RecordsetChangeComplete reason,objErr,status,objRs
Parameter | Description |
---|---|
reason | An EventReasonEnum value that specifies the reason for this event |
status | An EventStatusEnum value that indicates the status of the execution of the event |
objErr | The name of an Error object that describes the error if status is set to adStatusErrorsOccurred, otherwise it is not set |
objRs | The name of the Recordset object that triggered this event |
EventReasonEnum valori
Constant | Value | Description |
---|---|---|
adRsnRequery | 7 | An operation requeried the Recordset |
adRsnResynch | 8 | An operation resynchronized the Recordset with the database |
adRsnClose | 9 | An operation closed the Recordset |
EventStatusEnum Valori
Constant | Value | Description |
---|---|---|
adStatusOK | 1 | The operation that caused the event was successful |
adStatusErrorsOccurred | 2 | The operation that caused the event failed |
adStatusCantDeny | 3 | The operation that caused the event cannot be cancelled |
adStatusCancel | 4 | The operation that caused the event is cancelled |
adStatusUnwantedEvent | 5 | Prevents subsequent notifications before the event method has finished executing |
❮ Riferimento completo dell'oggetto Recordset