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Limiting DAO Access

Posted on 1999-01-20
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Last Modified: 2013-11-20
I have an Access database from where users need to access information. They do not need to append or edit any information, only read it. I wrote a program using CDaoRecordset for the users to retrieve the information.

The problem is that if I set the mdb file as read only so that users can't delete, add or change the records, the
Open() member function responds "... Cannot open file ...It is already open exclusively by another user."

Only if I give the users read and write access does the program work. But I don't want people to be able to change the database, i.e. with MS Access for example.

Is there a way to do this and get rid of that message.
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Question by:santama
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Accepted Solution

by:
Tommy Hui earned 200 total points
ID: 1328060
In CDaoDatabase, there is a method called Open to open a database. One of the arguments to Open is whether to open the database for readonly access. You should specify TRUE for this parameter.

CDatabase::Open
virtual BOOL Open( LPCTSTR lpszDSN, BOOL bExclusive = FALSE, BOOL bReadOnly = FALSE, LPCTSTR lpszConnect = “ODBC;”, BOOL bUseCursorLib = TRUE );
throw( CDBException, CMemoryException );


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Author Comment

by:santama
ID: 1328061
I'm using the following code, and I get the same message.:


Records.Open(dbOpenDynaset, NULL, dbReadOnly);

Where Records is a CDaoRecordset Object.

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