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Business rule against a form property
Message
From
06/12/2001 20:27:22
Gil Munk
The Scarborough Group, Inc.
Baltimore, Maryland, United States
 
 
To
06/12/2001 12:57:57
General information
Forum:
Visual FoxPro
Category:
The Mere Mortals Framework
Miscellaneous
Thread ID:
00590665
Message ID:
00590955
Views:
24
>Hope this isn't another dumb question but ....
>
>I have a business rule object that has a rule which simply compares the sum of several fields in the view with a total that the user entered in the form (the tot is saved in a property on the form).
>
>I tried something like:
>
>if v_invoice.ext + v_invoice.tax + v_invoice.extras <> thisform.nTotal
>
>which blew up because there is no form in the business rule class! So I'm using _screen.activeform.nTotal instead. Is this the best way to reference the property?
>
>Thanks

Sally,

Agreeing with Michael and Jay, it's good practice not to reference a form from within a business object unless you wrap it in a method that determines if the BO is being hosted by a form. The kBizObz has just such a method: IsFormHost().
Gil Munk


"If a nation expects to be ignorant and free, it expects what never was and never will be." - Thomas Jefferson
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