Access Virgin
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- Apr 8, 2003
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I have this code in a module for an audit trail, it is working fine for controls on my main forms but I cant get it to work for subforms on my main forms.
I have added the code to the subforms exactly the same way as I have to the main forms. If you open the sub form it works fine but when you make changes when the sub form is opened on the main form it doesnt record these changes.
Can anyone help? heres the code, I think it has something to do with the Set MyForm bit but not sure
Public Function Audit_Trail()
On Error GoTo Err_Audit_Trail
'ACC2000: How to Create an Audit Trail of Record Changes in a Form
'http://support.microsoft.com/default.aspx?scid=kb;en-us;197592
Dim MyForm As Form
Dim ctl As Control
Dim sUser As String
Set MyForm = Screen.ActiveForm
sUser = "User: " & MyForm.UserName 'You need to identify your users if you are not using Access security with workgroups.
' sUser = CurrentUser
'If new record, record it in audit trail and exit function.
If MyForm.NewRecord = True Then
MyForm!AuditTrail = MyForm!tbAuditTrail & "New Record added on " & Now & " by " & sUser & ";"
Exit Function
End If
'Set date and current user if the form (current record) has been modified.
MyForm!AuditTrail = MyForm!tbAuditTrail & vbCrLf & vbLf & "Changes made on " & Now & " by " & sUser & ";"
'Check each data entry control for change and record old value of the control.
For Each ctl In MyForm.Controls
'Only check data entry type controls.
Select Case ctl.ControlType
Case acTextBox, acComboBox, acListBox, acOptionGroup, acCheckBox
If ctl.Name = "tbAuditTrail" Then GoTo TryNextControl 'Skip AuditTrail field.
'If new and old value do not equal
If ctl.Value <> ctl.OldValue Then
MyForm!AuditTrail = MyForm!tbAuditTrail & vbCrLf & ctl.Name & ": Changed From: " & ctl.OldValue & ", To: " & ctl.Value
'If old value is Null and new value is not Null
ElseIf IsNull(ctl.OldValue) And Len(ctl.Value) > 0 Or ctl.OldValue = "" And Len(ctl.Value) > 0 Then
MyForm!AuditTrail = MyForm!tbAuditTrail & vbCrLf & ctl.Name & ": Was Previoulsy Null, New Value: " & ctl.Value
'If new value is Null and old value is not Null
ElseIf IsNull(ctl.Value) And Len(ctl.OldValue) > 0 Or ctl.Value = "" And Len(ctl.OldValue) > 0 Then
MyForm!AuditTrail = MyForm!tbAuditTrail & vbCrLf & ctl.Name & ": Changed From: " & ctl.OldValue & ", To: Null"
End If
End Select
TryNextControl:
Next ctl
Exit_Audit_Trail:
Exit Function
Err_Audit_Trail:
If Err.Number = 64535 Then 'Operation is not supported for this type of object.
Exit Function
ElseIf Err.Number = 2475 Then 'You entered an expression that requires a form to be the active window
Beep
MsgBox "A form is required to be the active window!", vbCritical, "Invalid Active Window"
Else
Beep
MsgBox Err.Number & " - " & Err.Description
End If
Resume Exit_Audit_Trail
End Function
I have added the code to the subforms exactly the same way as I have to the main forms. If you open the sub form it works fine but when you make changes when the sub form is opened on the main form it doesnt record these changes.
Can anyone help? heres the code, I think it has something to do with the Set MyForm bit but not sure
Public Function Audit_Trail()
On Error GoTo Err_Audit_Trail
'ACC2000: How to Create an Audit Trail of Record Changes in a Form
'http://support.microsoft.com/default.aspx?scid=kb;en-us;197592
Dim MyForm As Form
Dim ctl As Control
Dim sUser As String
Set MyForm = Screen.ActiveForm
sUser = "User: " & MyForm.UserName 'You need to identify your users if you are not using Access security with workgroups.
' sUser = CurrentUser
'If new record, record it in audit trail and exit function.
If MyForm.NewRecord = True Then
MyForm!AuditTrail = MyForm!tbAuditTrail & "New Record added on " & Now & " by " & sUser & ";"
Exit Function
End If
'Set date and current user if the form (current record) has been modified.
MyForm!AuditTrail = MyForm!tbAuditTrail & vbCrLf & vbLf & "Changes made on " & Now & " by " & sUser & ";"
'Check each data entry control for change and record old value of the control.
For Each ctl In MyForm.Controls
'Only check data entry type controls.
Select Case ctl.ControlType
Case acTextBox, acComboBox, acListBox, acOptionGroup, acCheckBox
If ctl.Name = "tbAuditTrail" Then GoTo TryNextControl 'Skip AuditTrail field.
'If new and old value do not equal
If ctl.Value <> ctl.OldValue Then
MyForm!AuditTrail = MyForm!tbAuditTrail & vbCrLf & ctl.Name & ": Changed From: " & ctl.OldValue & ", To: " & ctl.Value
'If old value is Null and new value is not Null
ElseIf IsNull(ctl.OldValue) And Len(ctl.Value) > 0 Or ctl.OldValue = "" And Len(ctl.Value) > 0 Then
MyForm!AuditTrail = MyForm!tbAuditTrail & vbCrLf & ctl.Name & ": Was Previoulsy Null, New Value: " & ctl.Value
'If new value is Null and old value is not Null
ElseIf IsNull(ctl.Value) And Len(ctl.OldValue) > 0 Or ctl.Value = "" And Len(ctl.OldValue) > 0 Then
MyForm!AuditTrail = MyForm!tbAuditTrail & vbCrLf & ctl.Name & ": Changed From: " & ctl.OldValue & ", To: Null"
End If
End Select
TryNextControl:
Next ctl
Exit_Audit_Trail:
Exit Function
Err_Audit_Trail:
If Err.Number = 64535 Then 'Operation is not supported for this type of object.
Exit Function
ElseIf Err.Number = 2475 Then 'You entered an expression that requires a form to be the active window
Beep
MsgBox "A form is required to be the active window!", vbCritical, "Invalid Active Window"
Else
Beep
MsgBox Err.Number & " - " & Err.Description
End If
Resume Exit_Audit_Trail
End Function