Access - VB to test if a Record exists before adding new using Recordset

Hello experts:

Sorry for this stupid question. Being a novice when I had to put my project down for several months I'm fuzzy on writing my code again.

Anyway, in my project I have a table of Zipcodes [sysdta_ZipCodes] and a table of State Codes [sysdta_FIPSStates].  I then have a table that relates them [sysctlZipFIPSState].

My table  [sysctlZipFIPSState] has the PKs from those two tables [ZipID] and [FIPSStateCode] set as primary keys.

I am trying to write code that looks at the recordset for the table [sysctlZipFIPSState] to see if that combo already exits before it tries to add it again and gives the user all that cryptic MS error that freaks them out.

    Dim lngZipID As Long, lngFIPSState As Long
    Dim rst1 As DAO.Recordset, lngCountID As Long
    
    lngZipID = Me.cboSelectZip.Column(0)
    lngFIPSState = Me.cboSelectState.Column(0)
    
    Set rst1 = CurrentDb.OpenRecordset("SELECT * FROM sysctl_ZipFIPSState WHERE [ZipID]=" & lngZipID & " AND [FIPSStateCode] =" & lngFIPSState)
    lngCountID = Nz(DCount("ZipID", "rst1"), 0)
    
    rst1.Close

Open in new window


This doesn't work as you'll know.  Am I using this wrong?
wlwebbAsked:
Who is Participating?
 
Goodangel MatopeSoftware ArchitectCommented:
oops sorry left out brackets in the insert statement

CREATE PROCEDURE spAddZIPState
@ZipID INT,
@StateCode varchar(10)
AS

IF NOT EXISTS(SELECT * FROM sysctl_ZipFIPSState
                        WHERE [ZipID]= @ZipID AND [FIPSStateCode] = @StateCode)
INSERT INTO sysctl_ZipFIPSState ([ZipID], [FIPSStateCode])
VALUES (@ZipID, @StateCode)

Open in new window



GO
0
 
Goodangel MatopeSoftware ArchitectCommented:
I would suggest you use a stored procedure to update the record, you could then use this procedure from your VB code, and the procedure would do the checking. An example stored procedure is shown below:

CREATE PROCEDURE spAddZIPState
@ZipID INT,
@StateCode varchar(10)
AS

IF NOT EXISTS(SELECT * FROM sysctl_ZipFIPSState
                        WHERE [ZipID]= @ZipID AND [FIPSStateCode] = @StateCode)
INSERT INTO sysctl_ZipFIPSState [ZipID], [FIPSStateCode]
VALUES @ZipID, @StateCode


GO

Open in new window


All you need to do in the vb code is call the stored procedure spAddZIPState
0
 
wlwebbAuthor Commented:
Thank you
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.