Article View: borland.public.cppbuilder.database.ado
Article #1725Re: CreateBlobStream
From: Viatcheslav V. Vassiliev
Date: Tue, 20 Apr 2004 09:56
Date: Tue, 20 Apr 2004 09:56
31 lines
2217 bytes
2217 bytes
Why do not you use BlobField->LoadFromStream()?
//------------------------------------------
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)
"kdl" <me@isp.net> �������/�������� � �������� ���������:
news:4083e397@newsgroups.borland.com...
> I am having major difficulty in getting CreateBlobStream to work properly
> with Builder 6. I am using the code below and I can get it to compile,
but
> the program crashes with a message like "Invalid Variant Operation". I am
> connected to a MS SQL database and the field that I am trying to access is
> defined as a VarByte with a size of 8000. The help in BCB6 is not correct
> for ADO blobs and I cannot find any other help on the web. I am stuck at
> this point. Please help if there are any sugestions.
>
> int MemSize;
> char *Buffer;
> TADOBlobStream *Stream;
>
> //Crashes on this line. I have tried many variations including
> "CreateBlobStream"with no success.
> Stream = new TADOBlobStream((TBlobField
> *)adoTraceDetailsDataSet->FieldByName("TraceArray") , bmRead);
>
>
Technical Details
Message-ID:
<4084f3da$1@newsgroups.borland.com>Path:
arc1-ca.pugleaf.net!archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mailReferences:
<4083e397@newsgroups.borland.com>Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII X-Google-Thread: 10698b,eb986792cae970be X-Google-Attributes: gid10698b,public X-Google-ArrivalTime: 2004-04-20 03:10:06 PST From: "Viatcheslav V. Vassiliev" <support@oledbdirect.com> Newsgroups: borland.public.cppbuilder.database.ado References: <4083e397@newsgroups.borland.com> Subject: Re: CreateBlobStream Date: Tue, 20 Apr 2004 13:56:43 +0400 Lines: 33 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 NNTP-Posting-Host: 213.234.218.42 Message-ID: <4084f3da$1@newsgroups.borland.com> X-Trace: newsgroups.borland.com 1082455002 213.234.218.42 (20 Apr 2004 02:56:42 -0700) Path: arc1-ca.pugleaf.net!archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail