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Using Multiple Recordsets to Turn Filter On/Off

Posted on 2012-04-05
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Last Modified: 2012-04-16
Uisng Access 2007, with libraries for DAO:
 - Microsoft Office 12.0 Access database engine Object Library
 - Microsoft Jet and Replication Objects 2.6 Library

On a form, I've put radio buttons/option group to select two different modes.

Mode1 - browse/edit all records in a table, sorted by ID (i.e.Primary Key). As a row is edited and saved, the userid and date/time-saved are both stored into two extra columns on the row.  Then use Back and Next buttons to move to previous/next row.

Mode2 - edit only rows which have not already been processed ( i.e. userid and date/time-saved columns are NULL).  When switching from Mode1 to Mode2, note current position, then when switched to Mode2, position goes to FIRST row where ID.Mode2 > ID.Mode1 (i.e. the "next" unedited row.)

I've currently implemented this with one recordset.  Switching to Mode2 is done with:
   
    Dim sSQL As String
    sSQL = "([USER_EDIT] IS NULL) AND ([USER_SAVE] IS NULL)"
    DoCmd.ApplyFilter whereCondition:=sSQL

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Switching back to Mode1 is done with:
Me.FilterOn = False

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Using this code, wherever I'm positioned in the recordset becomes the beginning of the sorted subset (i.e. any un-saved rows with [ID] < currentID will not appear in the rows for Mode2.)  In addition, the sort order changes completely .. can't really identify if there is one.  

It would seem that using two recordsets (rst1 and rst2), using the existing definition as is for rst1, then adding the sort and filter criteria to rst1 and create a second recordset via
set rst2 = rst2.OpenRecordset

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should work.. but I can't get the last statement to work... it says I have missing parameters for the OpenRecordset method.

The other thing that bothers me about this code is that I'm using a DoCmd.ApplyFilter to do the select, but then do a Me.FilterOn to reverse the operation.  What's DoCmd got to do with it, and what is "Me" referring to when it's used to turn off the filter?

Being new to Access VBA, I'm not clear on how these recordsets relate to the form.  I see what appears to be a "default" recordset named RECORDSET, and somehow the fields on the form are bound to the columns in this recordset.  At a conceptual level, if I could "swap" the recordsets bound to the form, then I could switch back and forth based on the desired mode.

Since conceptual does not match practical in many instances, what's the best way to get this done?

Thanks
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Question by:MiltonLClark
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Expert Comment

by:Jeffrey Coachman
Comment Utility
???

If I am reading your post correctly, ...I am not quite sure why you need recordsets for this...?

Why not simply post a sample DB, so we can eveluate your design?

Sample database notes:
1. Back up your database(s).
2. Combine the front and back ends into one database file.
3. Remove any startup options, unless they are relevant to the issue.
4. Remove any records unless they are relevant to the issue.
5. Delete any objects that do not relate directly to the issue.
6. Remove any references to any "linked" files (files outside of the database, Images, OLE Files, ...etc)
7. Remove any references to any third party Active-x Controls (unless they are relevant to the issue)
8. Remove, obfuscate, encrypt, or otherwise disguise, any sensitive data.
9. Compile the code. (From the VBA code window, click: Debug-->Compile)
10. Run the compact/Repair utility.
11. Remove any Passwords and/or security.
12. If a form is involved in the issue, set the Modal and Popup properties to: No
    (Again, unless these properties are associated with the issue)
13. Post the explicit steps to replicate the issue.
14. Test the database before posting.

In other words, ...post a database that we can easily open and immediately see and/or troubleshoot the issue.
And if applicable, also include a clear graphical representation of the *Exact* results you are expecting, based on the sample data.

JeffCoachman
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Accepted Solution

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MiltonLClark earned 0 total points
Comment Utility
A solution was found by a colleague... it had to do with assigning a 0-length string to the column instead of a NULL .. the missing rows were elided because they were not null, they had a 0-length string in them.

I'm keeping these steps handy in the event I need to post here again.

Thanks for the help.
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Author Closing Comment

by:MiltonLClark
Comment Utility
As stated in the comment, the solution was provided by a colleague, not by EE Expert.
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