Solved

Why do I get an error in a Text Box's "On Enter" event in an "empty" Access Form?

Posted on 2011-02-22
7
513 Views
Last Modified: 2012-05-11
I am developing an Access 2007 "project" (ADP) as a front-end to a SQL Server 2005 Express database.

I have a "continuous" Access Form that lists the records in a Table before they are printed on an Invoice or Credit Note. These rows of data can be modified or new rows added within the Form.

In the Footer of the Form I have a large Tab Control with several Tab Pages. Each of these Tab Pages contains further Combo controls and Text Box controls that govern what will be printed on the Invoice or Credit Note when it is eventually printed.

Normally this Form displays rows of records in the Detail Section when it is first opened, and I have no problems as I move from Tab Page to Tab Page in the Footer. However, if there are no records displayed to begin with, I get the following run-time error when I open a Tab Page and the focus is placed on a Text Box in the page.

Run-time error 2185
You can't reference a property or method for a control unless the control has the focus.

This happens in Text Boxes that contain messages that might be printed on the Invoice or Credit. It happens in the "On Enter" event procedure where I set ".SelStart" and ".SelLength" to 0, to position the text cursor at the first character of the text rather than selecting all the text.

I do not get this error if the Tab Page's first control is a Combo Box or if it is a Text Box for which I have not established an "On Enter" sub procedure. The cursor seems to sit in these controls OK. If I add a row of data to the Form's Detail section before opening the Tab Pages that have the "On Enter" procedures I do not get the error message.

Can someone explain to me why I get this error message when my Form is empty? I have another text control called ".txtLineCount" that I use to display the number of data lines. Even when I add the expression :
"If Nz(Me.TxtLineCount, 0) > 0 then" in my "On Enter" event procedure I get the error message at that point.

Many thanks. Colin.
0
Comment
Question by:colinasad
[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
  • 4
  • 3
7 Comments
 
LVL 3

Expert Comment

by:jmro20
ID: 34955164
Try setting the focus in the first line of the function like this: [YourTextBox].SetFocus
0
 

Author Comment

by:colinasad
ID: 34955784
Thanks for the prompt response, jmro20.

I tried your suggestion (with the lines shown below) but am still getting the same error message.    

    Me.txtTranTermsMessage.SetFocus
    With Me.txtTranTermsMessage
        .SelStart = 0
        .SelLength = 0
    End With

The VBA appears to crash on the ".SelStart=0" line. So it seems to be happy with the "Me.txtTranTermsMessage.SetFocus" line, but still doesn't like trying to do anything with the control's properties.

I think it is to do with having no real records in the continuous Form. I could live with that if I had a way of recognising that fact. My own ".txtLinesCount" field generates the same error when I try to check it when the Form's recordset is empty.

Can anyone tell me a safe way of checking for an empty recordset?

Regards. Colin.


0
 
LVL 3

Expert Comment

by:jmro20
ID: 34955852
Try this:
If Len(Trim$(Me.txtTranTermsMessage)) > 0 Then
    Me.txtTranTermsMessage.SetFocus
        With Me.txtTranTermsMessage
            .SelStart = 0
            .SelLength = 0
        End With
End If
0
Back Up Your Microsoft Windows Server®

Back up all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

 

Author Comment

by:colinasad
ID: 34955902
As I typed my previous message, it occured to me to try the following, in place of the ".SetFocus" expression before I set the ".SelStart" and ".SelLength" values :

"If Me.Recordset.RecordCount > 0 Then"
   
This seems to work OK. At least I don't get the run-time error when I have no records listed in the Detail section of my Continuous Form.

Does anyone have any further suggestions or thoughts they can offer on how better to handle this?

Thanks. Colin.
0
 

Accepted Solution

by:
colinasad earned 0 total points
ID: 34955918
Thanks, jmro.
I only received your last message after I submitted mine.
I'll give your suggestion a try, but I think the problem is with the empty recordset.

Colin.
0
 
LVL 3

Expert Comment

by:jmro20
ID: 34956018
Yes the problem is with the empty recordset.
0
 

Author Closing Comment

by:colinasad
ID: 35067649
Is it OK to accept my own response as the answer? I think we proved that the empty recordset causes the problems when we try to modify a control's properties.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

In a multiple monitor setup, if you don't want to use AutoCenter to position your popup forms, you have a problem: where will they appear?  Sometimes you may have an additional problem: where the devil did they go?  If you last had a popup form open…
It’s the first day of March, the weather is starting to warm up and the excitement of the upcoming St. Patrick’s Day holiday can be felt throughout the world.
In Microsoft Access, learn how to “cascade” or have the displayed data of one combo control depend upon what’s entered in another. Base the dependent combo on a query for its row source: Add a reference to the first combo on the form as criteria i…
Using Microsoft Access, learn some simple rules for how to construct tables in a relational database. Split up all multi-value fields into single values: Split up fields that belong to other things into separate tables: Make sure that all record…

724 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