Lauren Wilson wrote:
Hi folks,
Somewhere, I recently saw an article header titled:
"How to compact and Repair a back-end Access db from the front-end
using VBA" or words to that effect.
Now that I need it, I cannot find it. Does anyone know were to find
such an article?
Thanks
Lauren,
Rick has already mentioned the key piece needed but there are a few
things that you need to know about to make this work.
If the Backend is being accessed then the CompactDatabase method will
fail as it cannot get Exclusive use of it. Your code will need to trap
this error. Also, if your frontend maintains any attachments to the
backend (ie first form open opens a recordset on the backend to force
the backend ldb file to remain for the session - a known trick to
speedup FE-BE setups) you will need to have your code close them before
the compact (and I suppose reopen them after). In some situations, you
may need to 'unlink' the tables from the BE (test without first as it is
much easier to code). The newly compacted backend then needs to replace
the old backend. I usually leave it around as a backup (renamed). Below
my sig is a function I use as a starting place. I pass to it the name of
a table in the BE so it can get the name of the BE from its connection
string.
--
Bri
My code, watch for wrap.
Function Compactdb(TableName As String) As Boolean
On Error GoTo Err_CompactDB
'If Tables are always connected then use commented code
'Dim Connections() As String
Dim i, j As Integer
Dim tbl As TableDef
Dim stFileName
DoCmd.Hourglass True
stFileName = db.TableDefs(TableName).Connect
stFileName = Mid(stFileName, InStr(stFileName, "=") + 1)
'If Tables are always connected then use commented code
'i = db.TableDefs.Count
'ReDim Connections(i)
'j = 0
'For Each tbl In db.TableDefs
' Connections(j) = tbl.Connect
' If Left(tbl.Name, 4) <> "Msys" Then
' tbl.Connect = ""
' tbl.RefreshLink
' End If
' j = j + 1
'Next
DBEngine.CompactDatabase stFileName, stFileName & "TMP"
If Dir(stFileName & ".BCK") <> "" Then _
Kill stFileName & ".BCK"
Name stFileName As stFileName & ".BCK"
Name stFileName & "TMP" As stFileName
If Dir(stFileName & "TMP") <> "" Then _
Kill stFileName & "TMP"
Compactdb = True
'If Tables are always connected then use commented code
'j = 0
'For Each tbl In db.TableDefs
' If Left(tbl.Name, 4) <> "Msys" Then
' tbl.Connect = Connections(j)
' tbl.RefreshLink
' End If
' j = j + 1
'Next
Exit_Compactdb:
DoCmd.Hourglass False
Exit Function
Err_CompactDB:
DoCmd.Hourglass False
Compactdb = False
If Err.Number = 3356 Then
MsgBox "The database is currently being used by another User. " & _
"You can only Compact the Database if you are the only person " & _
"using it." & vbCr & _
vbCr & "Please try again later.", vbExclamation, & _
"Database in Use by Another User"
Else
MsgBox Err.Description
End If
Resume Exit_Compactdb
End Function
