Solved

Programming Multiple Recordsets

Posted on 2002-07-25
4
147 Views
Last Modified: 2013-11-26
I'm using VB6 against an SQL Server database.
I have a form which has 6 combo boxes on a form, each loaded with ado recordsets.
To load each recordset, I have declared in the General Declarations section a recordset and an sql string for each one.
And, I use the same routine for each of the six comboboxes to load them:
Set RsSubCommCodes = New ADODB.Recordset
SqlObjects = "SELECT * FROM objects ORDER BY Description"
RsSubCommCodes.Open SqlObjects, Cn, adOpenStatic, adLockBatchOptimistic
    If Not (RsSubCommCodes.BOF And RsSubCommCodes.EOF) Then
        cboObjectDesc.AddItem Space
        RsSubCommCodes.MoveFirst
        While Not RsObjects.EOF
            cboObjectDesc.AddItem RsObjects!Description
            RsSubCommCodes.MoveNext
        Wend
    Else
        txtMessage = "You Are Not Assigned Any Agencies"
    End If
---------------------------------------------
My question is:
Is there an easier way to code for this?
I'm concerned because I think using too many recordsets is eating up all of the memory on the machine.
Can someone let me know if there is a better way?

Thanks in Advance
John

0
Comment
Question by:jtrapat1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 10

Accepted Solution

by:
aeklund earned 50 total points
ID: 7178207
You only have one recordset in your example.  But to make sure the recordset gets released along with the connection, add this to your code where <ConnectionObject> is your connection object:

Set RsSubCommCodes = New ADODB.Recordset
SqlObjects = "SELECT * FROM objects ORDER BY Description"
RsSubCommCodes.Open SqlObjects, Cn, adOpenStatic, adLockBatchOptimistic
Set <ConnectionObject>.ActiveConnection = Nothing
   If Not (RsSubCommCodes.BOF And RsSubCommCodes.EOF) Then
       cboObjectDesc.AddItem Space
       RsSubCommCodes.MoveFirst
       While Not RsObjects.EOF
           cboObjectDesc.AddItem RsObjects!Description
           RsSubCommCodes.MoveNext
       Wend
   Else
       txtMessage = "You Are Not Assigned Any Agencies"
   End If

RsSubCommCodes.Close
Set RsSubCommCodes = Nothing
<ConnectionObject>.Close
Set <ConnectionObject> = Nothing
0
 

Author Comment

by:jtrapat1
ID: 7178238
aeklund,

Thanks for the help.
Where should I put your code to close the recordsets and set the objects to Nothing?

Here's my situation:
The user clicks on a record in a datagrid and is brought to another form with that record in edit-mode.
Here is where I have the six comboboxes (all loaded with active recordsets).

Should I release the recordsets and connections when the user exits this form and returns to the datagrid?

Thanks

John
0
 
LVL 3

Expert Comment

by:Bahnass
ID: 7181739
'''SELECT * FROM objects ORDER BY Description

if U just open recordset for Description

U should use

SELECT Description FROM objects ORDER BY Description

also

adOpenStatic, adLockBatchOptimistic
   is not needed to fill a combo

U can use read only , forward only
thus U can save Ur memory

0
 
LVL 10

Expert Comment

by:aeklund
ID: 7185332
As soon as the user is done editing the records, then I suggest release the resources.... so the queryunload event of the edit form would be a good place to do so.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I’ve seen a number of people looking for examples of how to access web services from VB6.  I’ve been using a test harness I built in VB6 (using many resources I found online) that I use for small projects to work out how to communicate with web serv…
Introduction While answering a recent question about filtering a custom class collection, I realized that this could be accomplished with very little code by using the ScriptControl (SC) library.  This article will introduce you to the SC library a…
Get people started with the utilization of class modules. Class modules can be a powerful tool in Microsoft Access. They allow you to create self-contained objects that encapsulate functionality. They can easily hide the complexity of a process from…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…

732 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question