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4GuysFromRolla.com : ASP FAQS : Databases, General


What is adovbs.inc? Why should I use it? What benefits does it have?

[Print this FAQ]

Answer: When you connect to a database through an ASP page you are using a set of objects referred to as Active Data Object, or ADO. This library of objects contains a number of constants that can be used when specifying various properties or making various method calls for the ADO objects.

ADOVBS.inc is a file included with IIS that has all of the ADO constants defined. When revieweing ASP scripts from this Web site and other related sites, you'll find a lot of ASP scripts that, when connecting to databases, use constants with names like
adOpenForwardOnly and adLockReadOnly. These are constants that are defined in the ADOVBS.inc file and define various connection and recordset properties with English-like names.

If you want to use ADO objects and would like to have access to these constants, you will need to include ADOVBS.inc in your ASP page. To do this all you need to do is add one simple line to the top of your ASP pages:

<!--#include virtual="/adovbs.inc"-->

and be sure to put ADOVBS.inc in your root web application directory. (To learn more about #include, be sure to read: The Low-down on #include.)

You can download ADOVBS.inc from this site in streaming text format.

Here is a snippet of the contents of ADOVBS.inc

' Microsoft ADO
' (c) 1996-1998 Microsoft Corporation. All Rights Reserved.
' ADO constants include file for VBScript

'---- CursorTypeEnum Values ----
Const adOpenForwardOnly = 0
Const adOpenKeyset = 1
Const adOpenDynamic = 2
Const adOpenStatic = 3

'---- CursorOptionEnum Values ----
Const adHoldRecords = &H00000100
Const adMovePrevious = &H00000200
Const adAddNew = &H01000400
Const adDelete = &H01000800
Const adUpdate = &H01008000
Const adBookmark = &H00002000
Const adApproxPosition = &H00004000
Const adUpdateBatch = &H00010000
Const adResync = &H00020000


For a more in-depth look at ADOVBS.inc be sure to check out this great article: What is Adovbs.inc and Why Do I Need It?

Note that you can also automatically include ADOVBS.inc in all of the pages on your Web site
using the METADATA tag in your Global.asa file. For more information on using
the METADATA tag, be sure to read: Using METADATA to Import DLL Constants!

Happy Programming!

FAQ posted by Scott Mitchell at 1/28/2001 5:10:19 AM to the Databases, General category. This FAQ has been viewed 87,088 times.

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