Database Form Events

The Events tab page, allows you to assign a macro to certain events which occur in a database form.

P'aportar a esta orde...

Open context menu of a selected form element - choose Form Properties - Events tab.

Open Form Design toolbar, click Form Properties icon - Events tab.


Pa enllazar un eventu con una macro, primero escriba una macro que contenga tolos comandos que se van executar cuando se produza l'eventu. De siguío, asigne dicha macro al eventu correspondiente faciendo clic nel botón ... qu'hai al pie de él. va abrise'l diálogu Asignar macro, que dexa escoyer la macro.

L'usuariu pue configurar llibremente les acciones siguientes, esto ye, pue usar los sos diálogos propios pa representar una aición:

  1. Amosar un mensaxe de fallu,

  2. Confirmar un procesu d'eliminación (de rexistros de datos),

  3. Consulta de parámetros,

  4. según comprobar les entraes al guardar un rexistru.

Por exemplu, ye posible crear una solicitú de «confirmación de desaniciu» como «¿Quies desaniciar realmente al veceru xyz?» al desaniciar un rexistru de datos.

note

The events that are shown in the Events dialog cannot be edited directly. You can remove an event from the list by pressing the Del key.


De siguío numbérense y describen toles acciones de formulariu que puen enllazase con una macro:

Al cargar

The When loading event occurs directly after the form has been loaded.

Al descargar

The When unloading event occurs directly after the form has been unloaded; that is, separated from its data source.

Al recargar

The When reloading event occurs directly after the form has been reloaded. The data content has already been refreshed.

Asocedió un fallu

The Error occurred event is activated if an error occurs when accessing the data source. This applies to forms, list boxes and combo boxes.

Confirmar "desaniciar"

The Confirm deletion event occurs as soon as data has been deleted from the form. Return True to allow row deletion, False otherwise. For example, the linked macro can request confirmation in a dialog.

Enantes d'anovar

The Before update event occurs before the control content changed by the user is written into the data source. The linked macro can, for example, prevent this action by returning FALSE.

Dempués d'anovar

The After update event occurs after the control content changed by the user has been written into the data source.

Enantes de reafitar

The Prior to reset event occurs before a form is reset. Returning True approves the reset, returning False cancels the operation.

va restablecese un formulariu cuando se cumpla una de les siguientes condiciones:

  1. L'usuariu calca un botón (HTML-) definíu como botón Reset.

  2. Créase un rexistru nuevu baleru nun formulariu enllazáu a la fonte de datos. Por exemplu, pue calcase el botón Rexistru siguiente nel últimu rexistru.

Dempués de reafitar

The After resetting event occurs after a form has been reset.

Enantes de descargar

The Before unloading event occurs before the form is unloaded; that is, separated from its data source.

Enantes de l'aición del rexistru de datos

The Before record action event occurs before the current record or record set are changed. Return True when changing is allowed, otherwise False. For example, the linked macro can request confirmation in a dialog.

Enantes de la unviada

The Before submitting event occurs before the form data is sent. Returning True approves the submission, False stops it.

Enantes de recargar

The Before reloading event occurs before the form is reloaded. The data content has not yet been refreshed.

Enantes del cambéu del rexistru de datos

The Before record change event occurs before the current record pointer - SQL cursor - is changed. Return True when moving is allowed, otherwise False.

Rellenar parámetros

The Fill parameters event occurs when the form to be loaded has parameters that must be filled out. For example, the data source of the form can be the following SQL command:

SELECT * FROM address WHERE name=:name

Here :name is a parameter that must be filled out when loading. The parameter is automatically filled out from the parent form if possible. If the parameter cannot be filled out, this event is called and a linked macro can fill out the parameter. Return True when the execution of the parametrized statement should continue, False otherwise.

Tres el cambéu del rexistru de datos

The After record change event occurs directly after the current record pointer has been changed.

Tres l'aición del rexistru de datos

The After record action event occurs directly after the current record has been changed.

Vetoable events

tip

Macros can interrupt event execution when they return a boolean value: True allows the execution of the event to continue and False stops the event execution.


The following events are interruptable by returning False:

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