Question

How can i save a calculated value from textbox in to the table?
I tried to make my calculation as the default value, it’s saving but if i change the input my calculation doesn’t change. If i put it to into my Control Source i can’t save it than.

Is it possible to save the calculation in to the table?

Kind Regards,
Lukso

Answer 1

For the most part, you need to use an event. The After Update event of a control is usually suitable. For example

 Form
 ---------------------------
 Amount : 10
 Tax    :  2
 Total  : 12  'Amount + Tax

With the above form, in the After Update event for Tax and for Amount, you could update the bound control Total to Amount + Tax.

Private Sub Amount_AfterUpdate()
    Me.Total = Me.Amount + Me.Tax
End Sub

As usual with calculations, you must ask yourself is it relevant to store this calculation or can it be obtained from a query?

Finally, with Access 2010 came data macros and calculated columns, which may also suit.