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# Database Form Events

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

Untuk mengakses fungsi ini...

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

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

Untuk menautkan suatu peristiwa dengan makro, pertama tulis makro yang mengandung semua perintah yang akan dieksekusi saat peristiwa terjadi. Kemudian tetapkan makro ini untuk masing-masing peristiwa dengan mengklik tombol ... disamping peristiwa yang terkait. dialog makro tetap terbuka, dimana anda dapat memilih makro.

Tindakan berikun dapat dikonfigurasi secara individual, yang berarti anda dapat menggunakan dialog sendiri untuk menggambarkan tindakan:

1. Menampilkan pesan kesalahan,

2. Mengkorfirmasi proses penghapusan (untuk catatan data),

3. Parameter kueri,

4. Memeriksa input saat menyimpan rekam data.

Misalnya, Anda dapat mengeluarkan permintaan "konfirmasi penghapusan" seperti "Benar-benar menghapus pelanggan xyz?" saat menghapus catatan data.

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.

Daftar berikut dan menjelaskan semua peristiwa dalam bentuk yang dapat ditautkan ke makro:

## Ketika memuat

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

## Ketika memuat ulang

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

## Konfirmasi penghapusan

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.

## Parameter isi

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.

## Saat tidak memuat

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

## Sebelum aksi rekam

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.

## Sebelum memuat

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

## Sebelum pemuktahiran

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.

## Setelah pemuktahiran

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

## Sebelum reset

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

Formulir direset jika satu dari kondisi berikut bertemu:

1. pengguna menekan tombol (HTML) yang didefinisikan sebagai tombol reset.

2. Rekaman baru dan kosong dibuat dalam formulir yang ditautkan ke sumber data. Contohnya, dalam rekaman terakhir, tombol Rekaman selanjutnya dapat ditekan.

## Usai mengatur ulang

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

## Sebelum pengajuan

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

## Sebelum perubahan catatan

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

## Sebelum tidak memuat

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

## Setelah aksi rekam

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

## Setelah perubahan catatan

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

## Terjadi kesalahan

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

## Vetoable events

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:

- Before record action

- Before record change

- Before submitting

- Before update

- Fill parameters