Normally with a combo box, you can select only 1 item
in the drop down list. But what happens when you want to “Select All”
the items in the list?
I have done this 2 different ways, 1 way is to put a checkbox on the form,
called “All”, and then have the combo box list, and the other way is giving
the user the option to “Select All” in the same list.
This eliminates the need for extra coding and for an extra check box control, thus
it SAVES TIME.
In this video, you will find out how to add the ability to “Select All”
to a combo box.
The “(All)” is done with a UNION query.
Here is the sql:
SELECT SupplierID, CompanyName FROM tblSuppliers UNION Select 0 as AllChoice , “(All)” as Bogus From tblSuppliers
This goes into the “Rowsource” of the dropdown list.
Here is another sample (now with a sort):
SELECT “(ALL)” AS Period FROM YTDFlowmonth UNION SELECT DISTINCT Period FROM YTDFlowmonth ORDER BY Period
Now (All) is part of the select list.
Select it and click “Show Supplier”, and you’ll see that it
becomes united with the list, and shows in the message box as
a valid item.
The following video shows you how to do it:
Hope it helps, here is the database:by