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What is this line of code doing?

Posted on 2014-12-29
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Last Modified: 2014-12-29
I'm working with an old Access 2003 database and on a particular form there is a combobox.  In the afterupdate event of the combobox is this line of code:

If Not rs.EOF Then Me.Bookmark = rs.Bookmark

Can someone tell me what it does?

--Steve
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Question by:SteveL13
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Jim Dettman (Microsoft MVP/ EE MVE) earned 250 total points
ID: 40521825
A bookmark is a pointer or tag for a given record within a recordset.  It's used to jump back to a specific point in a recordset.

Further on in the code, you'll find a place where it's being used to move back to a record.

Jim.
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by:Scott McDaniel (Microsoft Access MVP - EE MVE )
Scott McDaniel (Microsoft Access MVP - EE MVE ) earned 250 total points
ID: 40521837
Also, it's checking for the recordset's EndOfFile (EOF) before doing that. In English:

If the recordset is not at the end of the file, then move form's bookmark to the recordset's bookmark.
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One important point on bookmarks; the values don't survive a requery or anything that causes the recordset to be re-created (a close and open).

They are only valid for the current recordset.  Once you close it or requery it, any saved bookmark values are invalid.

 So it's not something you can save forever.  It's sole purpose is to be able to move back to a given record quickly in a recordset that your currently using.  In using it, you don't need to save a key for the record, then do a find.  That is however what your forced to do if you can't use a bookmark (say because you are doing a requery).

Jim.
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