Check if file has already been loaded

I use this VB code to load a test file into an access table.  How can I add to this to check if I have already loaded the file.


Private Sub cmdImport_Click()
If IsNull(Me.txtFileName) Or Len(Me.txtFileName & "") = 0 Then
    MsgBox "please select the excel file"
    Me.cmdSelect.SetFocus
    Exit Sub
End If
'DoCmd.TransferSpreadsheet acImport, acSpreadsheetTypeExcel9, "Import", Me.txtFileName, True
DoCmd.TransferText acImportDelim, "ImportSpecification", "STG_Load", Me.txtFileName, False
'DoCmd.TransferText acImportDelim
MsgBox "Your file has sucessfully loaded"
'Me.txtFileName = Null
End Sub

Thanks
Brian
LVL 1
bmcdowell540Asked:
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jdthedjCommented:
You could set a global variable the first time you open the file, then check it next time.
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rheitzmanCommented:
Or build a log table to track what has been imported. Say a table with two fields: Filename as Text, TimeImported as Date.

After import:
   CurrentDB.Execute :INSERT INTO Log (Filename, TimeImported) VALUES ("'" & me.txtFileName & "'",#" & now() & "#)"

Checking the log may get complicated if you can ever import the same filename twice. Otherwise use DLookup.
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jefftwilleyCommented:
If you only do this once a day, you can add the datestamp directly into the Imported Data. Anything with "Today's" date would be considered already imported.

Outside of that, we really don't have enough information to make an educated suggestion.

Importing is a whole process and has to be designed with rollback capability for it to be considered complete. Without an import ID or Timestamp, with a record of the file name you're importing (or a directory location of where its archived once its imported) then you simply don't have enough of your design in place.

J
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bmcdowell540Author Commented:
Thanks for your help.  Sorry it took me so long to respond.  I ended up using the global because it was easy to implement but if the future I may need to create a log table.
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