Rocky Smolin at Beach Access Software
rockysmolin at bchacc.com
Tue Jun 10 09:48:13 CDT 2008
I know how to make an unbound form but I haven't got enough nerve to present
such heresy - it runs counter to strongly held religious beliefs.
OK - briefly - but you didn't hear it from me.
1. Design your form as you would a bound form but no Control Source in the
text boxes.
2. Create a recordset in the Open event of the form (DAO or ADO - I prefer
DAO) using pretty much the same SQL or query as you would for your Record
Source in a bound form.
3. Add a module to put the fields from the current record of the recordset
into the text boxes which you can call whenever you want to display the data
on your form.
4. Add a module to put the values in the text boxes into the fields of the
current record (in DAO use .Edit or .Add and .Update) which you can call
whenever you want to write the textbox values back to the table.
5. I always put my own navigation buttons on the unbound for - First, Last,
Next, Previous with Click events that move the recordset point
appropriately.
HTH
Rocky Smolin
Beach Access Software
858-259-4334
www.e-z-mrp.com
www.bchacc.com
-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Jim Lawrence
Sent: Monday, June 09, 2008 5:38 PM
To: 'Access Developers discussion and problem solving'
Subject: Re: [AccessD] VBA Unbound data entry / update form
Hi Jennifer:
I have no idea how to create bound Access forms. ;-) The last bound database
that I have worked with was back in '97.
Jim
-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Jennifer Gross
Sent: Tuesday, May 27, 2008 5:12 PM
To: 'Access Developers discussion and problem solving'
Subject: Re: [AccessD] VBA Unbound data entry / update form
I have no idea how to create an unbound form in Access. I always use bound
forms. Though I would be interested to know how it's done. Unless I've got
it wrong, that seems to be the basic question here - For those of you who do
it, how do you create an unbound form? How do you populate the textboxes
initially and then how do you save the information back to the tables?
It's beginning to sound like nobody really does it.
Jennifer
-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of jwcolby
Sent: Tuesday, May 27, 2008 2:49 PM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] VBA Unbound data entry / update form
> 1) If your situation gives you the choice between Access and SQL Server,
then you can use SQL Server Express. For your customer's benefit - it's
free!
I know that, and you know that, but they have used an MDB BE for most of a
decade. SQL Server is the great unknown.
> 2) How many concurrent users? Too Many?
In the majority of cases, no. There ARE specific places where too many
users cause mysterious issues with an MDB.
Memos are written in "pages", as are indexes. If you open a record and
start to edit it, it "locks" an entire "page" of the index structure or the
memo area, which locks not just your record but potentially many others.
This simply doesn't happen in SQL Server because SQL Server doesn't have
this "page" system for storing memo fields etc.
> 3) How many indexes on the tables?
Not the point, the point is that ALL indexes are stored in Index pages, and
entire pages of indexs can be locked by a single edit.
Creating / using Indexes should be determined by need, not arcane locking
issues within Jet.
> 4) Are you starting up by setting a recordset to open and leaving it that
way?
If you are talking about creating and holding locks on the BE, yes I am, but
that isn't the issue either.
John W. Colby
www.ColbyConsulting.com
Dan Waters wrote:
> John - I've been reading this with interest:
>
> 1) If your situation gives you the choice between Access and SQL
> Server, then you can use SQL Server Express. For your customer's
> benefit - it's free!
>
> 2) How many concurrent users? Too Many?
>
> 3) How many indexes on the tables? I actually only use the primary
> key as an index on every table. More indexes slows down writing
performance.
>
> 4) Are you starting up by setting a recordset to open and leaving it
> that way? This greatly reduces 'churn' in the locking database. When
> I set this up all my users reported a significant performance improvement.
Code below:
>
> '------------------------------------------------------------------------
> Dim stgConnect As String
> Dim dbs As DAO.Database
> Dim tdf As DAO.TableDef
>
> stgConnect = BEFullPath
> Set dbs = DBEngine(0)(0)
> Set tdf = dbs.TableDefs("tblConnect")
> If tdf.Connect <> ";Database=" & stgConnect Then
> tdf.Connect = ";Database=" & stgConnect
> tdf.RefreshLink
> End If
> dbs.Close
>
> Set GrstConnect = DBEngine(0)(0).OpenRecordset("tblConnect",
> dbOpenSnapshot)
> '---------------------------------------------------------------------
> ---
>
> Notes: BEFullPath is a function to return the full path to the BE.
> tblConnect is a one row one field table in the BE.
> The table link is refreshed because the table link is in a
library.
> GrstConnect is a globally defined DAO recordset.
> GrstConnect remains open until just before the database is closed.
>
> Good Luck!
> Dan
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