Limit to List question?

[MLH]

I have a form: frmVehicleEntry Form
The form has a combo-box control: AuthEntityChoos erBox
The combo-box has a RowSource: property of:
SELECT DISTINCTROW IIf(IsNull([Company]),[Name],[Company]) AS
EntityName, qryAuthorizingE ntities.Address ,
IIf(IsNull([Company]),"Person","Com pany") AS EntityType,
qryAuthorizingE ntities.AuthID FROM qryAuthorizingE ntities;
The combo-box's BOUND field is the 4th and last field: AuthID

qryAuthorizingE ntities lists values between 1 and 350 in the AuthID
field. There are NO RECORDS in the source table (tblAuth) with values
over 350 - none.

The combo-box's LimitToList property is set to Yes.

How is it, then, that the following line runs WITHOUT ERROR
and actually succeeds in placing 500 in that control?
Me!AuthEntityCh ooserBox = 500

I can type Print Me!AuthEntityCh ooserBoxin the debug window and it
will return 500. The value is DEFINITELY there. How can that be?

[Albert D. Kallal]

Re: Limit to List question?

I not tested this, but in code, you can do all kinds of things, and the user
interface is ignored.

When you modify a value via code, NONE of the events fire. So, the before
update, after update, not in list....all of those things don't fire (none
never did..for the last 15+ years of ms-access).

So, it not really much of a surprise that the not-in list code don't
fire...since events don't fire when you use code and by-pass the user
interface.

The above is not only an explain, but, if you realize that events don't fire
when modifying values via code..then the ability to by-pass what you have on
a form makes sense. often, this ability is EXACLTY why we use code!!

If you going to need to limit the list via code, then you have to test.

eg:

dim lngValue as long


lngValue = 500

if isnull(dlookup( "AuthID","qryAu thorizingEntiti es","Authid = " & lngValue))
= true then
....value is not legal..
else
.....value is ok
end i


--
Albert D. Kallal (Access MVP)
Edmonton, Alberta Canada
pleaseNOOSpamKa llal@msn.com

[MLH]

Re: Limit to List question?

Thanks, Albert.
I understand.