A CdbDocument object includes information about one instance of an object. The object can be a database, saved table, query, or relationship (Microsoft Jet databases only).
Remarks
Each CdbContainer object has a Documents collection containing CdbDocument objects that describe instances of built-in objects of the type specified by the CdbContainer. The following table lists the type of object each CdbDocument describes, the name of its CdbContainer object, and the type of information CdbDocument contains.
CdbDocument | CdbContainer | Contains information about |
Database | Databases | Saved database |
Table or query | Tables | Saved table or query |
Relationship | Relations | Saved relationship |
Note Don't confuse the CdbContainer objects listed in the preceding table with the collections of the same name. The Databases CdbContainer object refers to all saved database objects, but the Databases collection refers only to database objects that are open in a particular workspace.
With a CdbDocument object, you can:
Because a CdbDocument object corresponds to an existing object, you can't create new CdbDocument objects or delete existing ones. To refer to a CdbDocument object in a collection by its ordinal number or by its Name property setting, use either of the following syntax forms:
Documents[0]
Documents["name"]
CdbDocument Constructor Syntax
Use any one of the following three constructors. The qualifier 'CONSTRUCTOR' in the syntax models is provided to help readability. It has no syntactic value.
CONSTRUCTORCdbDocument(VOID);
This constructor creates an instance of the class. There are no parameters.
CONSTRUCTORCdbDocument(const CdbDocument &);
Type | Description |
const CdbDocument & | Reference to an object. |
This constructor creates a copy of the object referenced in the parameter.
CONSTRUCTORCdbDocument(DAODocument *pdoc,
BOOL bAddRef = FALSE);
Type | Argument | Description |
DAODocument * | pdoc | A DAO Automation interface pointer corresponding to this DAO class. |
BOOL | bAddRef =FALSE |
Optional. A Boolean. If TRUE, the DAO Automation interface AddRef function is called. |
DAO functionality is presented through pointers to DAO Automation interfaces. This constructor makes a DAO interface available in the form of a DAO class object that provides additional functionality.
This constructor is not required for typical use. It is provided to enable you to easily create a DAO class object if you have access to the corresponding DAO interface.
When the destructor for the DAO object is invoked, the underlying Automation interface's Release member is called. If Release decrements the interface's reference count to zero, the pointer to the Automation interface can be deleted. If you don't want this to happen (for example, because you want to discard the DAO object, but continue using the Automation interface), specify TRUE for the second parameter. The underlying Automation interface's AddRef member is called, which counterbalances the eventual call to Release.