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How to implement 3-tier using VFP DB?
Message
From
20/12/2000 11:14:41
 
General information
Forum:
Visual FoxPro
Category:
Client/server
Miscellaneous
Thread ID:
00454613
Message ID:
00455444
Views:
31
>>ADO can handle this for you. Look at the help files.
>You have to go to MSDN and see ADODC to learn about 'RecordSet.Refresh;. Is the object we're all talking about the:MSAdodcLib.Adodc.6?
>So Graig,
>A developer could conceivably develop one interface, with ADO COM, to service data requests (via store procedures and a VFP 'thick client'), that could (both) work inside a firewall AND accross an ISP, right? The same 'program' would work regardless of its proximity to the 'backend' odbc. It almost seems that c/s applications should more or less rely on ADO for almost all the data stuff in order to be 'boltable' to a variety of architectures.
>
>Do you see much difference between the way a pass-thru cursor behaves, and the way an ADO RecordSet behaves. Is performance noticably degraded when stored procedure calls are required to pass through an ADO COM layer?
>
>Word!

Pass-through cursors work totally different than ADO. SPT is a two-tier solution and always returns a Fox cursor. ADO creates an object that holds the data and can be passed from component to component and tier to tier.

Using stored procedures is one way to improve performance.
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer
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