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Article #1801

Re: ADO Access database, and multiusers. Again

#1801
From: Viatcheslav V. Vassiliev
Date: Fri, 30 Jan 2004 13:17
50 lines
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> I've tried to call Requery(), and it's work, but what message or event
I've
> to wait for call Requery ?

There are no notifications. You call Requery() when you need to refresh
data.

> If I use server-side curson every changes are written on DB immediately ?

On client-side cursor changes are written immediately (if not in batch mode)
too. But on server-side cursor TADODataSet reads data from database while on
client-side cursor - from in-memory cache, so changes will be reflected only
on server-side cursor.

//------------------------------------------
Regards,
Vassiliev V. V.
http://www.managed-vcl.com - using .Net objects in Delphi for Win32 +
ADO.Net
http://www.oledbdirect.com - The fastest way to access MS SQL Server,
MS Jet (Access) and Interbase (through OLEDB)

"Stefano" <s.dardari@tin.it> �������/�������� � �������� ���������:
news:401a2f5d$2@newsgroups.borland.com...
> Hi Viatcheslav V. Vassiliev,
>
> > You should either use server-side cursor or call Requery() to renew
data.
> > Client-side cursor fetches all rows and work with in-memory cache, not
> with
> > data in database.
>
> Yes, but when a user do a change in the DB from a client, how the other
> clients can "feel" that  ?
>
> I've tried to call Requery(), and it's work, but what message or event
I've
> to wait for call Requery ?
>
> > You may get SELECT with server-side cursor. Generally you may execute
any
> > SQL statement for server-side cursor as for client-side cursor. However
> > sometimes recordset may become read-only and even forward-only.
>
> If I use server-side curson every changes are written on DB immediately ?
>
> Thank's for your patience! :)
> Steve
>
>
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Subject: Re: ADO Access database, and multiusers.  Again
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