I think what you want is a "DSN-LESS connection". I've done something similar in the past. Basically, at user login you re-link the tables using a connection string that you build based on the user's credentials.
Take a look at this prior SO Question for more details.
Also, here are a few routines I've used in the past that you are free to use \ modify. Call these from your login process.
Public Function RelinkDSNTables( _
ByVal ServerName As String, _
ByVal DatabaseName As String, _
ByVal UserName As String, _
ByVal Password As String) As Boolean
On Error GoTo Err_Handler
Dim dsn As String
dsn = GetDSNLink(ServerName, DatabaseName, UserName, Password)
Dim td As TableDef
Dim db As DAO.Database
Set db = CurrentDb
Dim rst As ADODB.Recordset
'Get a list of tables that need to be relinked'
If GetLocalRecordSet(rst, "SELECT * FROM TableMapping") < 1 Then
Err.Raise 1000, "Missing Tables!", "Missing Table Mappings!"
End If
Dim fNeedToRefresh As Boolean
'See if we actually need to relink the tables'
For Each td In db.TableDefs
If td.Connect <> vbNullString Then
If td.Connect <> dsn Then
fNeedToRefresh = True
Exit For
End If
End If
Next td
If fNeedToRefresh = False Then
RelinkDSNTables = True
GoTo Err_Handler
End If
'Drop linked table in Access'
For Each td In CurrentDb.TableDefs
If td.Connect <> vbNullString Then
CurrentDb.TableDefs.Delete td.Name
End If
Next td
'Create new linked table using new DSN'
rst.MoveFirst
Do Until rst.EOF
Set td = db.CreateTableDef(rst!LocalTableName, dbAttachSavePWD, rst!RemoteTableName, dsn)
db.TableDefs.Append td
rst.MoveNext
Loop
'Because I am paranoid, refresh the link'
db.TableDefs.Refresh
For Each td In db.TableDefs
If td.Connect <> "" Then td.RefreshLink
Next td
RelinkDSNTables = True
Err_Handler:
If Err.Number = 3011 Then
'Happens if user does not have permission in SQL Server; Nothing to see here, move along'
Err.Clear
Resume Next
ElseIf Err.Number = 3010 Then
'already exists; should not occur, but if it does eat the exception and move on'
Err.Clear
Resume Next
ElseIf Err.Number <> 0 Then
Err.Raise Err.Number, Err.Source, Err.Description
End If
End Function
Private Function GetDSNLink( _
ByVal ServerName As String, _
ByVal DatabaseName As String, _
ByVal UserName As String, _
ByVal Password As String) As String
On Error GoTo Err_Handler
If ServerName = "" Or DatabaseName = "" Then
Err.Raise -1220, "Missing Server \ DB", _
"Unable to refresh table links because you are missing the server or database name!"
End If
Dim dsnLink As String
If UserName = "" Then
'trusted connection'
dsnLink = "ODBC;DRIVER=SQL Server;SERVER=" & ServerName & _
";DATABASE=" & DatabaseName & ";Trusted_Connection=Yes"
Else
'MixedMode connection'
'//WARNING: This will save the username and the password with the linked table information.
dsnLink = "ODBC;DRIVER=SQL Server;SERVER=" & ServerName & _
";DATABASE=" & DatabaseName & ";UID=" & UserName & ";PWD=" & Password
End If
GetDSNLink = dsnLink
Err_Handler:
If Err.Number <> 0 Then
Err.Raise Err.Number, Err.Source, Err.Description
End If
End Function
Edit: Added sample GetLocalRecordSet Function
Public Function GetLocalRecordSet(ByRef rs As ADODB.Recordset, ByVal sql As String) As Long
On Error GoTo Err_Handler
If sql = vbNullString Then
Err.Raise vbObjectError + 1001, _
"Empty SQL String", "Empty SQL String Passed to GetLocalRecordset Function!"
End If
Set rs = New ADODB.Recordset
rs.Open sql, CurrentProject.Connection, adOpenKeyset, adLockOptimistic
If rs Is Nothing Then
GetLocalRecordSet = -1
GoTo Err_Handler
End If
If rs.State = adStateOpen Then
If Not rs.EOF Then
rs.MoveLast
GetLocalRecordSet = rs.RecordCount 'store number of records
rs.MoveFirst
Else
GetLocalRecordSet = 0
End If
Else
GetLocalRecordSet = -2
End If
Err_Handler:
If Err.Number <> 0 Then
Err.Raise Err.Number, Err.Source, Err.Description
End If
End Function
