How Do I Make ADO Constants Available in my ASP Code?

If you use any ADO constant, like adOpenForwardOnly etc, ASP has to know what adOpenForwardOnly really means. There are a couple of ways to tell ASP where to look for these constants.
  1. Declare them yourself, like this:

    Const adOpenForwardOnly = 0

    This is not recommended, because you have to do this on every page where you use the constants.

  2. Include the file, (found in C:\Program Files\Common Files\System\Ado by default) with the following code (you'll need to copy it to your virtual root of your website or modify the path in the statement):

    <!--#include virtual="/"-->

  3. Add a reference to the ADO dll in your global.asa. For this to work, you need to know the exact location of the DLL which can be a problem if you use an ISP or can't / don't use the global.asa.

    However, IMHO this is the recommend way, because all constants are included directly from the source. If anything ever changes, there's no risk you have an old include file:

    <!--METADATA TYPE="typelib" FILE="C:\Program Files\Common Files\SYSTEM\ADO\msado15.dll" NAME="ADODB Type Library" -->

    Modify the above path to match your location of the msado15.dll file.

Where to Next?

Wonder where to go next? You can post a comment on this article.

Doc ID 332
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Written by Imar Spaanjaars
Date Posted 01/05/2005 17:56
Date Last Reviewed 05/24/2006 20:57


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