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Abstract vs. Concrete Classes. Can anyone tell me?
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À
05/08/1999 13:40:26
Information générale
Forum:
Visual FoxPro
Catégorie:
Classes - VCX
Divers
Thread ID:
00250219
Message ID:
00250377
Vues:
28
>Jim,
>
>Quick question on "Effective Techniques".
>
>In chapter 5, the timecard example, no tables are used in the form only views. Is there any reason for the read-only type view, such as the basis for a combo that shows all employees, other than to simplify matters if the data get upsized to SQL Server, for example.
>
>Thanks,
>
>Pf
Perry,

That chapter was written by Seve Sawyer and he uses views exclusively for all data activity. As for what benefits there might be for using a view, well you can limit the number of employees in the view using a parameterized view. That can surely speed up the list or combo.

If you read the chapter on Views, Steve gives a very good explanation as to why he prefers to use views exclusively.
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