Article View: borland.public.cppbuilder.database.ado
Article #3569Re: Custom Database Objects
From: Vassiliev V.V.
Date: Thu, 11 Jul 2002 07:30
Date: Thu, 11 Jul 2002 07:30
31 lines
2334 bytes
2334 bytes
Look Examples\DBTasks\TextData sample in BCB5/6. Buffer holds a record data - not necessary string. Each field is stored at predefined (by you) offset. Regards, Vassiliev V.V. http://www.oledbdirect.com "Mark Petryk" <markpetryk@yahoo.com> ???????/???????? ? ???????? ?????????: news:3D2C9E84.9030609@yahoo.com... > I am trying to construct my own database object, consistent with > borland's objects, that connects to my own database engine (sort of). > Actually, it's a client program that has conduits to the internal data > through DDE and COM. So, I want to construct my own database object to > "transform" (so to speak) my DDE/COM database to a database object that > can be placed on a TDBGrid or TDBEdit or any of the other objects. > > Is there documentation on how to do this? > > I have built an object, so far, that looks like the TDataSet object. > I've gotten as far as noticing that when I connect my TMyDataSet object > to the TDataSource object for a TDBGrid object that it begins making > calls (IsCursorOpen, AllocRecordBuffer, GetRecord) and so on. But, > AllocRecordBuffer, for instance, returns a pointer to a character > buffer. My data, necessarily, isn't in a big character buffer. It's a > bunch of fields and things. So, is there some sort of documentation > that can provide some guidance? > > Any help is greatly appreciated. >
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10698b,1099f485881ce80e X-Google-Attributes: gid10698b,public X-Google-ArrivalTime: 2002-07-11 02:54:58 PST From: "Vassiliev V.V." <news@vassilievvv.mtu-net.ru> Newsgroups: borland.public.cppbuilder.database.ado References: <3D2C9E84.9030609@yahoo.com> Subject: Re: Custom Database Objects Date: Thu, 11 Jul 2002 11:30:45 +0400 Lines: 33 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 NNTP-Posting-Host: 62.118.133.35 Message-ID: <3d2d3e72_1@dnews> X-Trace: dnews 1026375282 62.118.133.35 (11 Jul 2002 01:14:42 -0700) Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-05!sn-xit-06!sn-xit-01!sn-xit-08!supernews.com!feed.textport.net!news.stealth.net!news.stealth.net!skynet.be!skynet.be!newsfeed01.tsnz.net!newsfeeds.ihug.co.nz!ihug.co.nz!dnews