Article: Q129980
Product(s): Microsoft FoxPro
Version(s):
Operating System(s):
Keyword(s): kbenv kbnokeyword kbvfp300 kbvfp500 kbvfp600
Last Modified: 10-AUG-1999
-------------------------------------------------------------------------------
The information in this article applies to:
- Microsoft Visual FoxPro for Windows, versions 3.0, 5.0, 6.0
-------------------------------------------------------------------------------
SUMMARY
=======
A data session is a set of work areas used by a form, form set, report, or
label. This article explains the use of a private data session in a form or form
set and the settings it affects.
MORE INFORMATION
================
When a form or a form set is loaded, it uses the Default Data session by
default. This means that the work areas and all settings are global. You can
however define private data sessions with your form and form sets by modifying
the DATASESSION property of the form.
When a data session is private, work areas are private to the object. Thus, two
forms can use the same tables, and the record pointer can move independently in
both forms. This can be particularly useful with the Visual FoxPro object model,
where multiple instances of the same object can exist and you might need to
access multiple records in the same table.
In addition to scoping work areas, a private data session of a form affects some
SET commands that control the environment. Private data sessions use:
- The default Visual FoxPro settings.
Modifying these settings in a program or in the Command window has no effect on
the SET commands if a form has a PRIVATE data session. The following SET
commands are scoped to private data sessions:
SET ANSI
SET AUTOSAVE
SET BLOCKSIZE
SET CARRY
SET CENTURY
SET COLLATE
SET CONFIRM
SET CURRENCY
SET DATABASE
SET DATE
SET DECIMALS
SET DELETED
SET DELIMITERS
SET EXACT
SET EXCLUSIVE
SET FIELDS
SET FIXED
SET LOCK
SET MARK TO
SET MEMOWIDTH
SET MULTILOCKS
SET NEAR
SET NULL
SET PATH
SET POINT
SET REFRESH
SET REPROCESS
SET SAFETY
SET SEPARATOR
SET TALK
SET UNIQUE
If you need to modify the default settings that are used by a form with a private
data session, you can do the following:
- If you have a Data Environment and the AUTOLOADTABLES property is set to .T.,
you can add your SET code in the BEFOREOPENTABLES event handler. This event
is executed before the tables are opened. The BEFOREOPENTABLES event is
executed before the Load event of the Form Set. For example, if the default
setting for TALK is ON, and you want to modify this setting while your form
is running, type the following in the Method for the BEFOREOPENTABLES event:
SET TALK OFF
- If you do not have a DataEnvironment associated with a form, place the code
in the LOAD event of the form.
Additional query words:
======================================================================
Keywords : kbenv kbnokeyword kbvfp300 kbvfp500 kbvfp600
Technology : kbVFPsearch kbAudDeveloper kbVFP300 kbVFP500 kbVFP600
Issue type : kbinfo
=============================================================================