Transfer A value from a subform to the form

[ashraf_al_ani]

Dear All
i have form and subform there is a calculated field in the subform
I want to transfer this value to a bound field in the main form and this
value is updatable (i mean every time the calculated field is changed the
value in the main field updated directly)


please any idea to help me

best reagrds

 

[Allen Browne]

Is this something like a total, where the data would be messed up if the
value didn't match?

If so, you must not store the value in the main form's total. Doing so
violates the most basic rules of data normalization.

If it could be meaningfully different, you will need to use the AfterUpdate
and AfterDelConfirm event procedures of the subform to calculate the value,
and assign it to the text box on the parent form.

 

[John W. Vinson]

Dear All
i have form and subform there is a calculated field in the subform
I want to transfer this value to a bound field in the main form and this
value is updatable (i mean every time the calculated field is changed the
value in the main field updated directly)


please any idea to help me

best reagrds

Storing derived data such as this in your table accomplishes
three things: it wastes disk space; it wastes time (almost
any calculation will be MUCH faster than a disk fetch); and
most importantly, it risks data corruption. If one of the
underlying fields is subsequently edited, you will have data
in your table WHICH IS WRONG, and no automatic way to detect
that fact.

Just redo the calculation whenever you need it, either as a
calculated field in a Query or just as you're now doing it -
in the control source of a Form or a Report textbox.