Changing a control value with VB code


F

Fred

I'm trying to change several controls to 0 if a certain condition is met
using VB code, but I keep getting an error stating that I can't change those
values. Is there an easy to do this?

my current code looks something like this
ie. If x=0 then
a=0
b=0
end if

TIA
 
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A

Alex White MCDBA MCSE

Hi,

if your control is called say text1 then the proper way to set the values is
me.text1.value = 0 or text1.value = 0 also use the option explicit at the
top of all modules and code behind forms etc. this makes sure that your code
and references are declared properly.
 
F

Fred

I tried your suggestions and it isn't working.
The way I have it set up, there are three fields that if one of them is null
or zero, I want all of them to be set to 0 when you exit the form. So my
event occurs upon clickin the "close form" button.

The error I'm getting is a run-time error "you can't assign a value to this
object".

Thanks again.
 
A

Alex White MCDBA MCSE

Hi Fred,

couple of questions

are these fields or textboxes ?

if they are fields then we are talking at a database level, if they are
textboxes are they bound to a recordset on the form?

if they are textboxes then maybe setting the default value in the properties
= 0 might sort the problem.

I have just tested setting values in the form close event for a textbox and
it worked without fault, so I need a bit more information, maybe post the
code within the form close event so I can see what is going on.
 
A

Alex White MCDBA MCSE

so you need something like this ...

for bound forms/controls

me.text1.value = 0

docmd.runcommand accmdsaverecord

or

docmd.close acform, me.name, acsaveyes

for database fields that are not bound

DAO for dao, you need to run the edit method first

daoTable.Edit
daoTable!Field1.Value = 0
daoTable.update

for ado

adoTable.fields("Field1").value = 0
adoTable.update


also trying something like

if isnull(adoTable.fields("Field1").value) then
adoTable.fields("Field1").value = 0
end if

have you thought about setting default field values at a table level?

if none of the above helps post up some code and I will look at it for you.
 
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F

Fred

Alex,

I'm gonna try to work around this one for now. I'm running out of time.
Really appreciate all your help and I'll give these last suggestions a try
when I get a chance.

Best Regards,
Fred
 
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A

Albert D. Kallal

if you have the controls actually placed on the screen, then you can use:


me.MyContorl = 0

If the fields are part of the underlying reocrdset, and NOT placed on the
screen, (or you change the recorsouce via code), then you can use:


me!MyFieldName = 0

You do NOT have to create a reocrdset, or use the recordset clone, or use
the reocrdset.Edit method.
 

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