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Set control .enabled property to false, control .enabled property still true

Posted on 2008-11-02
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Last Modified: 2012-05-05
I have implemented custom navigation buttons, below is my button update code.

            If .BOF Then
                cmdMovePrevious.Enabled = False
            Else
                cmdMovePrevious.Enabled = True
            End If

After cmdMovePrevious.Enabled = False is executed cmdMovePrevious.enabled is still true. Why is this happening, below I have almost identical code for cmdMoveNext and it does not give me any problems.
Public Sub EnableDisableButtons()

    On Error Resume Next

    txtRecordNumber = frmNavigate.CurrentRecord

    

    If Err <> 0 Then Exit Sub
 

    If frmNavigate.RecordsetClone.RecordCount > 0 Then frmNavigate.RecordsetClone.MoveLast
 

    If frmNavigate.NewRecord = True Then

        txtRecordNumber = frmNavigate.RecordsetClone.RecordCount + 1

        lblTotalRecords.Caption = " of  " & frmNavigate.RecordsetClone.RecordCount + 1
 

        hidden.SetFocus

        cmdAddNew.Enabled = False

        cmdMoveNext.Enabled = False

        

        If frmNavigate.RecordsetClone.RecordCount > 0 Then

            cmdMovePrevious.Enabled = True

        Else

            cmdMovePrevious.Enabled = False

        End If

    Else

        lblTotalRecords.Caption = " of  " & frmNavigate.RecordsetClone.RecordCount

        

        hidden.SetFocus

        cmdAddNew.Enabled = True
 

        frmNavigate.RecordsetClone.Bookmark = frmNavigate.Bookmark

        With frmNavigate.RecordsetClone

            .MovePrevious

            

            hidden.SetFocus

            If .BOF Then

                cmdMovePrevious.Enabled = False

            Else

                cmdMovePrevious.Enabled = True

            End If

        End With

        

        frmNavigate.RecordsetClone.Bookmark = frmNavigate.Bookmark

        With frmNavigate.RecordsetClone

            .MoveNext

            

            hidden.SetFocus

            

            If .EOF Then

                cmdMoveNext.Enabled = False

            Else

                cmdMoveNext.Enabled = True

            End If

        End With

    End If

End Sub

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0
Comment
Question by:bejhan
  • 2
4 Comments
 
LVL 5

Expert Comment

by:sinjin
ID: 22864058
The root cause of this seems to be that even though you be on the first record, it is still after BOF.  In other words, Recordsets have start with BOF, then move into Record 1, 2,3, ... X, new record, and finally EOF.  In your sample code you move previous only one time.  Perhaps if you used your recordset clone to test if a second move previous = BOF then your code would work as you expect.  Alternatively, you could check the index value of the current record. If it = 1 then you know you are on the first record and you could then disable the move previous button.
luck,
-sinjin
0
 
LVL 14

Expert Comment

by:ldunscombe
ID: 22865041
Not sure where you are using your code but just beware that you can't disable a control that has the focus. ie if your code is in the onClick event of your cmdMovePrevious command button then it won't work.  You first have to move the focus to a different control before you can disable it.

ie
me.SomeotherControl.set focus
me.cmdMovePrevious.enabled = false.

As I said, I'm not sure here and I may be way of the mark, Just something to consider.

Leigh
0
 
LVL 1

Author Comment

by:bejhan
ID: 22871513
SInjin: This isn't the issue. If you look at the images I posted the statement cmdMovePrevious.Enable = False is evaluated (it is highlighted while I am single stepping). So the .BOF condition is evaluating to true like it should, for some reason this statement doesn't have any effect on the enabled property.

Leigh: I posted below part of the code posted in my first post, I do set the focus to a hidden object on the form before attempting to set the enabled property on a button (I have previously run into the problem of focus before).

The only thing is I am just noticing I have On Error Resume Next at the beginning of my procedure and I never set it back to On Error Goto 0 after that. Does On Error Resume Next apply to the whole procedure then? If so, it may be surpressing an error at that statement. I am not back at work until tomorrow. Will have to try then.
        hidden.SetFocus

        cmdAddNew.Enabled = True

 

        frmNavigate.RecordsetClone.Bookmark = frmNavigate.Bookmark

        With frmNavigate.RecordsetClone

            .MovePrevious

            

            hidden.SetFocus

            If .BOF Then

                cmdMovePrevious.Enabled = False

            Else

                cmdMovePrevious.Enabled = True

            End If

        End With

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0
 
LVL 14

Accepted Solution

by:
ldunscombe earned 250 total points
ID: 22891911
If by "Hidden Object" you mean that it's visible property is set to false then that is probably the error you are missing.

ie You can't set the focus to a hidden control.

Leigh
0

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