Preserving linked tables for Access DBs in same folder when the folder changes

Question

I've got two Access databases that share linked tables. They are deployed together in a directory and accessed via code in a Word form.

How can I make sure that the links are preserved when the two databases are copied (together) to a different folder? Since I'm not "opening" the database, per se (it's being accessed via ADO), I don't know how to write code to refresh the links.

Answer 1

Update 14APR2009 I found that the previous answer I gave here was erroneous, so I updated it with new code.

How to proceed

• Copy the code below to a VBA module.

• From code or from the Immediate window in the VBA IDE, simply type:

  RefreshLinksToPath Application.CurrentProject.Path
  

This will now relink all the linked tables to use the directory where your application is located.
It only needs to be done once or whenever you relink or add new tables.
I recommend doing this from code every time you start your application.
You can then move your databases around without problems.

Code

'------------------------------------------------------------'
' Reconnect all linked tables using the given path.          '
' This only needs to be done once after the physical backend '
' has been moved to another location to correctly link to    '
' the moved tables again.                                    '
' If the OnlyForTablesMatching parameter is given, then      '
' each table name is tested against the LIKE operator for a  '
' possible match to this parameter.                          '
' Only matching tables would be changed.                     '
' For instance:                                              '
' RefreshLinksToPath(CurrentProject.Path, "local*")          '
' Would force all tables whose ane starts with 'local' to be '
' relinked to the current application directory.             '
'------------------------------------------------------------'
Public Function RefreshLinksToPath(strNewPath As String, _
    Optional OnlyForTablesMatching As String = "*") As Boolean

    Dim collTbls As New Collection
    Dim i As Integer
    Dim strDBPath As String
    Dim strTbl As String
    Dim strMsg As String
    Dim strDBName As String
    Dim strcon As String
    Dim dbCurr As DAO.Database
    Dim dbLink As DAO.Database
    Dim tdf As TableDef

    Set dbCurr = CurrentDb

    On Local Error GoTo fRefreshLinks_Err

    'First get all linked tables in a collection'
    dbCurr.TableDefs.Refresh
    For Each tdf In dbCurr.TableDefs
        With tdf
            If ((.Attributes And TableDefAttributeEnum.dbAttachedTable) = TableDefAttributeEnum.dbAttachedTable) _
               And (.Name Like OnlyForTablesMatching) Then
                collTbls.Add Item:=.Name & .Connect, key:=.Name
            End If
        End With
    Next
    Set tdf = Nothing

    ' Now link all of them'
    For i = collTbls.count To 1 Step -1
        strcon = collTbls(i)
        ' Get the original name of the linked table '
        strDBPath = Right(strcon, Len(strcon) - (InStr(1, strcon, "DATABASE=") + 8))
        ' Get table name from connection string '
        strTbl = Left$(strcon, InStr(1, strcon, ";") - 1)
        ' Get the name of the linked database '
        strDBName = Right(strDBPath, Len(strDBPath) - InStrRev(strDBPath, "\"))

        ' Reconstruct the full database path with the given path '
        strDBPath = strNewPath & "\" & strDBName

        ' Reconnect '
        Set tdf = dbCurr.TableDefs(strTbl)
        With tdf
            .Connect = ";Database=" & strDBPath
            .RefreshLink
            collTbls.Remove (.Name)
        End With
    Next
    RefreshLinksToPath = True

fRefreshLinks_End:
    Set collTbls = Nothing
    Set tdf = Nothing
    Set dbLink = Nothing
    Set dbCurr = Nothing
    Exit Function

fRefreshLinks_Err:
    RefreshLinksToPath = False
    Select Case Err
        Case 3059:

        Case Else:
            strMsg = "Error Information..." & vbCrLf & vbCrLf
            strMsg = strMsg & "Function: fRefreshLinks" & vbCrLf
            strMsg = strMsg & "Description: " & Err.Description & vbCrLf
            strMsg = strMsg & "Error #: " & Format$(Err.Number) & vbCrLf
            MsgBox strMsg
            Resume fRefreshLinks_End
    End Select
End Function

This code is adapted from this source: http://www.mvps.org/access/tables/tbl0009.htm.
I removed all dependency on other functions to make it self-contained, that's why it's a bit longer than it should.