Charlotte Foust
cfoust at infostatsystems.com
Fri Feb 11 12:10:51 CST 2005
No, because the objects in the two models are different, and there's no such thing as an ADODB.Database. If you intend to use ADO, you have to become familiar with its objects and syntax and keep it quite distinct in your mind (and your code) from DAO. Charlotte Foust -----Original Message----- From: John Clark [mailto:John.Clark at niagaracounty.com] Sent: Friday, February 11, 2005 5:03 AM To: accessd at databaseadvisors.com Subject: RE: [AccessD] Question on Reference (DAO) So, where I already had: Dim db As DAO.Database Dim rs As DAO.Recordset I would put: Dim db As ADODB.Database Dim rs As ADODB.Recordset ????? It is working now, because I went into Tools/References and clicked on the, "Microsoft DAO 3.6 Reference Library." I was just wondering if this would follow through to the client PC. >>> cfoust at infostatsystems.com 2/10/2005 4:20 PM >>> The only correction I'll suggest to that, John, is that the reference is to an ADODB.Recordset, etc. Charlotte Foust -----Original Message----- From: John W. Colby [mailto:jwcolby at colbyconsulting.com] Sent: Thursday, February 10, 2005 12:11 PM To: 'Access Developers discussion and problem solving' Subject: RE: [AccessD] Question on Reference (DAO) John, What he is saying is that you explicitly reference the lib in the dim statement. Dim db as DAO.Database Dim rst as DAO.Recordset ADO has a recordset method that returns a recordset object Dim rst as ADO.Recordset If you just say Dim rst as Recordset And you have referenced both the ADO and DAO libraries, then the object returned will be an ADO recordset if that is higher in the list of referenced objects, and a DAO object if that is higher in the list of referenced objects. By specifically stating: Dim rst as DAO.Recordset You are unambiguously telling the compiler to get a DAO recordset object. Likewise: Dim rst as ADO.Recordset tells the compiler to get an ADO recordset object. If you reference both the DAO and ADO libs, you always SHOULD specify which object you are after. You don't literally have to, but what you get back will depend on reference order and thus could change if someone changed the order that the libs are referenced. NOT a good thing! John W. Colby www.ColbyConsulting.com Contribute your unused CPU cycles to a good cause: http://folding.stanford.edu/ -----Original Message----- From: accessd-bounces at databaseadvisors.com [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of John Clark Sent: Thursday, February 10, 2005 2:57 PM To: accessd at databaseadvisors.com Subject: RE: [AccessD] Question on Reference (DAO) Do I reference them via code, or on each PC that runs the program? Or, does it follow through after I set the reference while programming it? >>> tom.bolton at donnslaw.co.uk 2/10/2005 3:58 AM >>> Hear hear! I've found this too - not having used DAO for years I shied away from it when returning to an Access project but it's noticeably quicker when using it for native Access objects. Access was after all designed around DAO/Jet. I can't stress enough what Charlotte said: if you use a mixture of DAO and ADO, REFERENCE THEM EXPLICITLY! (ADODB.Recordset, DAO.Database etc.) You'll be in a whole world of pain otherwise. Cheers Tom -----Original Message----- From: Bobby Heid [mailto:bheid at appdevgrp.com] Sent: 09 February 2005 19:27 To: 'Access Developers discussion and problem solving' Subject: RE: [AccessD] Question on Reference (DAO) It is my understanding that when accessing native Access databases, that DAO is the best performer. If you will be accessing SQL Server or other OLE databases, use ADO. Bobby -----Original Message----- From: accessd-bounces at databaseadvisors.com [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of John Clark Sent: Wednesday, February 09, 2005 1:51 PM To: accessd at databaseadvisors.com Subject: [AccessD] Question on Reference (DAO) I am working on a new program in A2K. Most of my older existing stuff is A97, and I just used some old code which had a problem. Basically, I took some code I was using, from an A97 db, to add items to a combo on NotInList...I think the code was originally written by Dev Ashish. I got a "reference" error, so I went into the references and added Microsoft DAO 3.6 object library, and it is working now. My question is this; is this alright, or should I have adapted the code to fit 2K? Is there any penalty that I risk (i.e. speed, etc.) by keeping it this way? 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