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-
- Here is my most straight forward explanation of how to
- connect your Delphi application to an Access 2.0 database. With this
- method, I have connected to Access 2.0 databases, and been able to read and
- write records to my hearts content. NOTE: You MUST have the proper ODBC
- drivers. If you don't, this will not work!
-
- REQUIRED DRIVERS:
- ODBCJT16.DLL dated 11/18/94 or later
- ODBCINST.DLL dated 08/17/94 or later
- ODBCCTL16.DLL dated 11/18/94 or later
- MSAJT200.DLL dated 11/18/94 or later
- MSJETERR.DLL dated 11/18/94 or later
- MSJETINT.DLL dated 11/18/94 or later
-
- To the best of my knowledge, these are all of the drivers that are above and
- beyond your base ODBC drivers. You should be able to obtain these from MS
- on their FTP/WWW site, however I do not know exact directories. My company
- is a MS Solutions Provider, and we obtained these drivers on one of the many
- CDs we received from MS.
-
- Now for the meat of this posting:
-
- To access a database via ODBC, you must first create an ODBC connection to
- the database.
- 1) Open Control Panel, and then select ODBC.
- 2) When the Data Sources dialog appears, select Add.
- 3) If you have installed all of the drivers properly, you should see the
- following Access drivers:
- Access Data (*.mdb)
- Access Files(*.mdb)
- Microsoft Access Driver (*.mdb)
- 4) The one you MUST choose is the third one, Microsoft Access Driver.
- Choosing any of the others will not work.
- 5) You will then be presented with the ODBC Microsoft Access 2.0 Setup
- dialog. Fill this in with the information regarding the database to which
- you wish to connect.
- 6) Save the settings and then exit all the way out of Control Panel.
-
- After having made a proper connection to the database with ODBC, the rest is
- quite simple.
- 7) Open BDE Config.
- 8) Choose New ODBC Driver.
- 9) Give your SQL link a name
- 10) From the Default ODBC Driver combo box, you must choose the Microsoft
- Access Driver, just the same as you did in the ODBC setup. Do not choose
- Access Data/Files drivers.
- 11) If everything is setup properly, the name of your database should
- appear in the Default Data Source Name combo box. Select it now.
- 12) Select OK, you will be back to the main dialog for BDE Config.
- Select the aliases tab.
- 13) Create a new alias, using the SQL link that you just created (it will
- start with ODBC_) as your Alias Type.
- 14) Now save and exit from BDE Config.
-
- You should now be able to get to you Access 2.0 database with both read and
- write instructions.
-
- And finally...
- I must say that having got to Access, via ODBC, you will probably wish you
- hadn't. It is sssllllooowww. Anytime we start adding layers, it gets
- slower and slower. Normally, I would recommend staying away from VB like
- the plague (I'm an old C++ hacker of many years, and the term BASIC makes me
- shudder). However, at this point in time, the best way to use Access
- databases is through either Access or VB. Microsoft is very close-mouthed
- about the structure of Access databases, and there is no indication that
- they are planning to change ("You either use VB/Access or we'll make you pay
- through the ODBC monster!"). Sorry, I digress. My recommendation, if you
- absolutely MUST use Access, then use VB. Otherwise, migrate your database
- to a more open system (Paradox,dBase/FoxPro,anything you can get a native
- engine), and use Delphi.
-
- I hope this helps those who are still having problems accessing Access
- databases via ODBC. If I've left anything out, I would appreciate
- commentary (no flames please...whine whine ;)
-
- Good Luck!
- Lance Leverich
- PDA, Inc.
- lancel@pdainc.com
- (913) 469-8700 ext.4110
-