'Could not convert variant of type (Null) into type (String)'

Article View: borland.public.cppbuilder.database.ado

Article #634

Back to borland.public.cppbuilder.database.ado Previous Next

#634

From: Kura
Date: Fri, 13 Jan 2006 10:34

20 lines
1676 bytes

In borland C++ builder 6 I add ADOTable and set up
ConnectionString on value:
Provider=MSDASQL.1;Password=masterkey;Persist Security Info=True;User
ID=sysdba;Data Source=ConnectFbServer;Mode=ReadWrite


I connecting with Firebird, I have OLE DB driver from
Firebird website.


In propertise for ADOTable  "table name" I choose my table,and set active on 
true
When i compiling the program i get an exception:
Project "Name.exe" raised exception class EVariantTypeCastError with
message 'Could not convert variant of type (Null) into type (String)'.


I don`t have any others components then Form and ADOTable.

I'll be greatfull for any suggestions.(Sory for my Englisch!)

Technical Details

Message-ID: <43c78184@newsgroups.borland.com>

Path:

arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!news3.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed.hal-mli.net!feeder1.hal-mli.net!news-out.superfeed.net!propagator2-sterling.newsfeeds.com!in.nntp.be!caladan.landsraad.net!newsgroups.borland.com!not-for-mail

Show Full Headers

Complete Article Headers

X-Google-Thread: 10698b,675aba66c3209cb7,start
X-Google-Attributes: gid10698b,public
X-Google-Language: ENGLISH,ASCII-7-bit
From: "Kura" <kurakusmaximus@poczta.onet.pl>
Newsgroups: borland.public.cppbuilder.database.ado
Subject: 'Could not convert variant of type (Null) into type (String)'
Date: Fri, 13 Jan 2006 11:34:01 +0100
Lines: 23
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2900.2670
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670
X-RFC2646: Format=Flowed; Original
NNTP-Posting-Host: 80.55.120.54
Message-ID: <43c78184@newsgroups.borland.com>
X-Trace: newsgroups.borland.com 1137148292 80.55.120.54 (13 Jan 2006 02:31:32 -0700)
Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!news3.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed.hal-mli.net!feeder1.hal-mli.net!news-out.superfeed.net!propagator2-sterling.newsfeeds.com!in.nntp.be!caladan.landsraad.net!newsgroups.borland.com!not-for-mail