reader.getstring null

Article View: pl.comp.lang.vbasic

Article #104278

Back to pl.comp.lang.vbasic Previous Next

#104278

From: Jędruś
Date: Sat, 29 Aug 2009 21:15

13 lines
1499 bytes

witam

odczytuje dane z bazy za pomocą SQLDataReader`a, czyli:

if not reader.getstring(nrpola) = system.dbnull then
   wartosc = reader.getstring(nrpola)
end if

ale mi krzyczy:

" 'dbnull' is a type in 'system' and cannot be used as an expression "

co muszę zrobić, aby zadziałało sprawdzenie.

Technical Details

Message-ID: <c21664e6-68e7-4649-9711-976f97841db3@p23g2000vbl.googlegroups.com>

Path:

mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!newsfeed.gazeta.pl!feed.news.interia.pl!news.nask.pl!news.nask.org.pl!goblin1!goblin.stu.neva.ru!postnews.google.com!p23g2000vbl.googlegroups.com!not-for-mail

Show Full Headers

Complete Article Headers

Path: mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!newsfeed.gazeta.pl!feed.news.interia.pl!news.nask.pl!news.nask.org.pl!goblin1!goblin.stu.neva.ru!postnews.google.com!p23g2000vbl.googlegroups.com!not-for-mail
From: Jędruś <anowacki.pila@interia.pl>
Newsgroups: pl.comp.lang.vbasic
Subject: reader.getstring null
Date: Sat, 29 Aug 2009 14:15:09 -0700 (PDT)
Organization: http://groups.google.com
Lines: 13
Message-ID: <c21664e6-68e7-4649-9711-976f97841db3@p23g2000vbl.googlegroups.com>
NNTP-Posting-Host: 86.63.105.127
Mime-Version: 1.0
X-Trace: posting.google.com 1251580510 5567 127.0.0.1 (29 Aug 2009 21:15:10 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Sat, 29 Aug 2009 21:15:10 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: p23g2000vbl.googlegroups.com; posting-host=86.63.105.127;  posting-account=96L34woAAADPw3buWDWlsliW2KsLUmpO
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0;  Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR  3.5.30729; .NET CLR 3.0.30618),gzip(gfe),gzip(gfe)
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit