Check for existence of a field in a Microsoft Access table

I have a vba program that alters a linked table - a new field is added.  Before I create the field, I need to make sure that it doesn't already exist.  Here is the code I have to do the alter:

Public Function Alter_Table()
    Dim db As DAO.Database
    Dim tdf As DAO.TableDef
    Dim fld As DAO.Field
    Dim strSQL As String
   
    On Error GoTo Alter_Table_Exit
   
    Set db = DBEngine.OpenDatabase("C:\Quote Templates\Data Files\Quote Data.mdb")
    Set tdf = db.TableDefs("tbl_Quotes")
   
    Set fld = tdf.CreateField("Freight_PO", dbBoolean)
    fld.DefaultValue = 0
    tdf.Fields.Append fld
    Set fld = Nothing
   
    Set fld = tdf.CreateField("Freight_Amt", dbCurrency)
    fld.DefaultValue = 0
    tdf.Fields.Append fld
    Set fld = Nothing
    Set tdf = Nothing
   
    db.Close
    Set db = Nothing

    Set db = CurrentDb()
    Set tdf = db.TableDefs("tbl_Quotes")
    tdf.RefreshLink

Alter_Table_Exit:
   
    DoCmd.OpenQuery ("qupd_Freight_Amt_0")
     
    Set tdf = Nothing
    db.Close
    Set db = Nothing
    Exit Function
   
End Function
Marilync1266Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Rey Obrero (Capricorn1)Commented:
Set db = DBEngine.OpenDatabase("C:\Quote Templates\Data Files\Quote Data.mdb")
    Set tdf = db.TableDefs("tbl_Quotes")

'add this codes

For Each fld In tdf.Fields
    If fld.Name = "Freight_PO" Then
        MsgBox "Field exists"
        Exit Function
    End If
Next

'end of codes    to add

Set fld = tdf.CreateField("Freight_PO", dbBoolean)
    fld.DefaultValue = 0
    tdf.Fields.Append fld
    Set fld = Nothing
0
Marilync1266Author Commented:
If it exists - I don't want to display a message, I need to continue in the code to check the next field - Freight_Amt
0
Rey Obrero (Capricorn1)Commented:
ok, how many fields are you going to check?
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

Marilync1266Author Commented:
Just 2 - freight_po and freight_amt
0
Rey Obrero (Capricorn1)Commented:
Public Function Alter_Table()
    Dim db As DAO.Database
    Dim tdf As DAO.TableDef
    Dim fld As DAO.Field
    Dim strSQL As String
   
    On Error GoTo Alter_Table_Exit
   
    Set db = DBEngine.OpenDatabase("C:\Quote Templates\Data Files\Quote Data.mdb")
    Set tdf = db.TableDefs("tbl_Quotes")
   
   Dim blnFld1 As Boolean, blnFld2 As Boolean
   For Each fld In tdf.Fields
        If fld.Name = "Freight_PO" Then
            blnFld1 = True
        End If
        If fld.Name = "freight_amt" Then
            blnFld2 = True
        End If
   
    Next

   If blnFld1 = False Then
            Set fld = tdf.CreateField("Freight_PO", dbBoolean)
            fld.DefaultValue = 0
            tdf.Fields.Append fld
            Set fld = Nothing
   End If
   
      If blnFld2 = False Then

            Set fld = tdf.CreateField("Freight_Amt", dbCurrency)
            fld.DefaultValue = 0
            tdf.Fields.Append fld
            Set fld = Nothing
            Set tdf = Nothing
   End If
    db.Close
    Set db = Nothing

    Set db = CurrentDb()
    Set tdf = db.TableDefs("tbl_Quotes")
    tdf.RefreshLink

Alter_Table_Exit:
   
    DoCmd.OpenQuery ("qupd_Freight_Amt_0")
     
    Set tdf = Nothing
    db.Close
    Set db = Nothing
    Exit Function
   
End Function
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Marilync1266Author Commented:
Excellent!  Thanks!
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Applications

From novice to tech pro — start learning today.

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.