Solved

Prevent duplicate records

Posted on 2014-02-25
2
212 Views
Last Modified: 2014-02-25
Am expert had helped me with the following code to prevent duplicate entries in a table and I suppose it works but if a form is opened to review a current record and then the form is closed they get a message indicating that the record already exists.  I have this code in the onclose event of the form.

How can I fix this problem?  We definitely don't want duplicate records but we do want to be able to review an existing record.

Here's the code:

    If DCount("*", "tblProducts", "ProdName & SizeID & FormatID & LocationID = " & Chr(34) & Me.cboProdName & Me.cboSizeID & Me.cboFormatID & Me.cboLocationID & Chr(34)) > 0 Then
        MsgBox "This product already exists.  Please correct your entry."
        Me.cmdCloseForm.SetFocus
        Cancel = True
    End If

Open in new window

0
Comment
Question by:SteveL13
  • 2
2 Comments
 
LVL 61

Expert Comment

by:mbizup
ID: 39886663
Try moving the code to the Before Update event of the form... which only runs if the record has changed.
0
 
LVL 61

Accepted Solution

by:
mbizup earned 500 total points
ID: 39886678
Alternatively, since you are using a custom close button... move the code to the Click Event of cmdClose, but add a check to only run the code if the form is dirty:

If Me.Dirty = True then
    If DCount("*", "tblProducts", "ProdName & SizeID & FormatID & LocationID = " & Chr(34) & Me.cboProdName & Me.cboSizeID & Me.cboFormatID & Me.cboLocationID & Chr(34)) > 0 Then
        MsgBox "This product already exists.  Please correct your entry."
        Me.cmdCloseForm.SetFocus
        'Cancel = True  <<--- needed in the Before Update event, not in a command button click event
    End If
End if

Open in new window

0

Featured Post

Simplifying Server Workload Migrations

This use case outlines the migration challenges that organizations face and how the Acronis AnyData Engine supports physical-to-physical (P2P), physical-to-virtual (P2V), virtual to physical (V2P), and cross-virtual (V2V) migration scenarios to address these challenges.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Access 2016 5 54
User Level Security 6 38
ACCESS 2010 - VBA - generic Table Open Button - Code 7 24
split XML field into many fields from MS Access 21 24
Regardless of which version on MS Access you are using, one of the harder data-entry forms to create is one where most data from previous entries needs to be appended to new records, especially when there are numerous fields and records involved.  W…
As tax season makes its return, so does the increase in cyber crime and tax refund phishing that comes with it
Familiarize people with the process of retrieving data from SQL Server using an Access pass-thru query. Microsoft Access is a very powerful client/server development tool. One of the ways that you can retrieve data from a SQL Server is by using a pa…
With Microsoft Access, learn how to start a database in different ways and produce different start-up actions allowing you to use a single database to perform multiple tasks. Specify a start-up form through options: Specify an Autoexec macro: Us…

772 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