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1/1/2009
Access Calendar Seminar
By Richard Rost   Richard Rost on Facebook Richard Rost on Twitter Richard Rost on Google Plus Richard Rost on LinkedIn Email Richard Rost

 
Manage your appointments, and create printable monthly reports from your Access databases.

Permanent Link
Course Link: Access Calendar Seminar
Keywords: access calendars appointments
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triple state box Comment from Lynda Chase @ 9/8/2014
Duh!!!  Can't see the woods for the trees - I found my error!  Soooo frustrated with myself lol.

Sorry for been a time waster.

Lynda :o)
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triple state box Comment from Lynda Chase @ 9/8/2014
Hi Richard.

I have the triple state box working, however, when i click on it, which should 'show open' it comes up blank.

This is the code I put in:
Private Sub ApptListBox_DblClick(Cancel As Integer)

    DoCmd.OpenForm "CalendarF", , , "CalendarID=" & ApptListBox
    
End Sub

Private Sub Form_Open(Cancel As Integer)

    ShowClosedItems = False
    ShowClosedItems_AfterUpdate
    
End Sub

Private Sub ShowClosedItems_AfterUpdate()

    If ShowClosedItems = True Then
        ApptListBox.RowSource = "SELECT CalendarID, LocationID, WorkerID, CustomerID, DateTime, Description FROM CalendarT WHERE Closed=TRUE ORDER BY DateTime;"
    ElseIf ShowClosedItems = False Then
        ApptListBox.RowSource = "SELECT CalendarID, LocationID, WorkerID, CustomerID, DateTime, Description FROM CalendarT WHERE Closed=FALSE ShowClosedItems ORDER BY DateTime;"
    Else
        ApptListBox.RowSource = "SELECT CalendarID, LocationID, WorkerID, CustomerID, DateTime, Description FROM CalendarT ORDER BY DateTime;"
    End If
        
    
End Sub

I can't seem to see where I've gone wrong.

Thanks
Lynda
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Triple State Checkboxes Comment from Ronald Pero @ 8/15/2013
I did not realize you could type null in as a default value.  That seems to be what is required for the checkbox to work as a triple state.  If you have yes or no in the default field it behaves as if triple state is set to no.  If you set default as False it locks the checkbox.


Reply from Richard Rost:

It shouldn't happen that way. NULL means "no value." You should be able to specify any of the three as default values.
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Triple State Checkboxes Comment from Ronald Pero @ 8/14/2013
After further playing around with the triple state of my checkbox is that at least in Access 2010 you cannot put anything in the default value for the checkbox.  The video says to set that to False but maybe that worked in 2007, in 2010 at least it makes the checkbox act like its locked and so it won't change state.


Reply from Richard Rost:

I'm not sure what you mean. You can set the default value of a check box to YES, NO, or (in the case of a tri-state) NULL. I know for a fact that this works in Access 2007 and 2013. I don't see why it wouldn't work in 2010.
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Triple State Checkboxes Comment from Ronald Pero @ 8/12/2013
I cannot seem to get the triple state version of the listbox to work in Access 2010.  I found an article online that said you needed to change the closed items checkbox data type to integer instead of yes/no.  Doing this did seem to prevent me from getting an error but it still doesn't seem to work as a triple state.  Does anyone have any suggestions?


Reply from Richard Rost:

They're a pain to work with. They're easiest as UNBOUND check boxes to select criteria on a form. If you want to use it with a BOUND field, then YES, you need to make the data type Integer or Long Integer (you can't use a Y/N value). Yes will be -1, No will be 0, NO SELECTION will be NULL.
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