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Clever way to close all cursors
Message
De
07/08/1998 11:36:43
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
00124575
Message ID:
00124820
Vues:
34
>>>In reports (sometimes in forms), I can use over half a dozen temporary cursors to extract and format data. Does anyone have a clever way of closing all cursors used in a report. I have grown tired on manually destroying all cursors at the end of a method or upon the closing of a report.
>>>
>>>Since I open all my tables at the start of the app (still the old fashioned way), I could count the highest table # and when a report or form is release make a loop to close tables and cursors higher than than number. Is there a more clever way?
>>
>>If you make the report have a private DE, you don't have to think about it. The *USE* command has an option *NoRequery DSID* where you can put *1* for the DSID and it will use the information in the already opened tables in the default DS (i.e., little or no performance hit).
>
>I don't understand... perhaps we are talking about two different things.
>
>The temporary cursors that I am refering to are created using SQL-select statements. It is these that I want to close, not the actual tables.

I prefer a way to discipline coding: enumerating all cursors (CREATE CURSOR ...) in Form.Init event and closing them in Form.Destroy event. To be precize I use convention aliases: i.e. if form name is frmSearch then cursors will get alias 'curFrmsearch1','curFrmsearch2' etc, i.e. it's easy to write some generic method to trace all used cursor aliases in Form.Destroy event.
Edward Pikman
Independent Consultant
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