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Private Data Sessions -- What are they good for
Message
De
08/12/1999 21:29:49
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Gestionnaire d'écran & Écrans
Divers
Thread ID:
00300134
Message ID:
00300732
Vues:
27
>>Yes, they are called by form manager. Each form (if it's data-specific) has master_key property to move data pointer from its Activate event and then retrieve data. Basically, there is nothing to clean-up afterwards. Every form will work independently, moving pointer to the last master_key position when it gets the focus, or form manager will tell the form how to move it. Obviously, it's all about modeless forms.
>
>Ed,
>
>You could set the data session to private and dump the property and the moving of the record pointer forever. Your form manager could manage only forms and not data, the forms don't need to know where they were last because nothing has changed. The activate doesn't have to restore pointers because they haven't moved. And everything is managed at the VFP level and not in interpreted code that has to execute.

How it's possible for a form to decide is somethiong changed or not? Maybe record or data pointer was changed by some other form?
Obviously, I'm not going to dump anything. Jim, I have developed too many application this way. I'm afraid that you're missing my point: I do not say that private DS is bad, I say that there are other ways. As I understand you develop your systems differently, and you have expertise in that area. I develop applications this way, and have some knowledge here.
Edward Pikman
Independent Consultant
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