EventClasses Element (ADF)
Contains elements that define one or more event classes used by this application.
Синтаксис
<Application>
...
<EventClasses>
Element Characteristics
| Characteristic | Description |
|---|---|
Data type |
None. |
Default value |
None. |
Occurrence |
Optional once per Application element. |
Updates |
Can be added and deleted when updating the application. |
Element Relationships
| Relationship | Elements |
|---|---|
Parent element |
|
Child elements |
Замечания
An application is not required to have event classes. The Transact-SQL queries that generate notifications can obtain data from other sources.
.gif "ms145192.note(ru-ru,SQL.90).gif") Важно! |
|---|
| If you delete the EventClasses group of elements, updating the application deletes the event classes, including all related SQL Server tables and indexes. Any data existing in the original event class tables is permanently deleted. |
Пример
The following example shows an EventClasses element that has placeholders for two event classes. For an example of an event class, see EventClass Element (ADF).
<EventClasses>
<EventClass>
<!-- Define first event class here -->
</EventClass>
<EventClass>
<!-- Define second event class here -->
</EventClass>
</EventClasses>
См. также
Справочник
Application Definition File Reference
Другие ресурсы
Определение свойств основного класса событий
Обновление экземпляров и приложений