class DataModule
Topic group Related topics Example
An empty container in which to store data objects.
Syntax
[<oRef> =] new DataModule( )
<oRef>
A variable or property in which to store a reference to the newly created DataModule object.
Properties
The following table lists the properties of the DataModule class. (No events or methods are associated with this class.)
|
Properties |
Default |
Description |
|
DATAMODULE |
Identifies the object as an instance of the DataModule class | |
|
(DATAMODULE) |
Identifies the object as an instance of a custom class. When no custom class exists, defaults to baseClassName | |
|
Empty string |
The name of a custom object | |
|
null |
Container, form or report | |
|
|
The primary rowset of the data module | |
|
|
|
|
|
Event |
Parameter |
Description |
|
|
Before the object is released. |
Description
Use data modules to maintain multiple data objects and the relationships between them. Data modules bear some similarity to forms, except that they contain data objects only. Array, Session, Database, Query, and StoredProc objects are contained inside a DataModule object. They are represented by source code in files with a .DMD extension. You can create custom data modules (in .CDM files) and subclass them.
The relationships between the objects—in particular any masterSource, masterRowset, or masterFields properties—in addition to other properties and event handlers can be set for all the objects in the data module. A primary rowset is assigned in the data module’s rowset property, just like in a form. The DataModule object is intended to be a simple container. Other than rowset, the only other properties associated with this object are baseClassName, className, name and parent.