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blob of sql server

Posted on 2001-08-17
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Last Modified: 2010-04-06
i use a dbimage item in delphi to insert into a image data in sql server, but it always tell me the "invalid blob length",

what's the problem

ws1999
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Question by:ws1999
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Expert Comment

by:jsweby
ID: 6396673
FAQ4271B

Question:
How come I'm getting the error "Invalid Blob Length" when
trying to post a blob to an ODBC datasource when the blob is greater than 1000000 bytes?

Answer:
This is a current limitation of the BDE ODBC driver. Native drivers do not have this limitation.


J.
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Accepted Solution

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Mohammed Nasman earned 100 total points
ID: 6396697
if you are using the BDE to connect to sql server

1) go to the BDE Admin
2) click in your alias(sql server)
3) change the blob size to be more than 32kb, use value bigger than the image that u want to store in the database

if you still have problems, for storing images in database, use the Stream, specially if you are store not bitmap images (like jpg)

I made a simple project for storing images in the database, using the stream, I test it with oracle, paradox, ms access, without any change of the code

I post it in old question
http://www.experts-exchange.com/jsp/qShow.jsp?ta=delphi&qid=20145695

Best regards
Mohammed Nasman
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Author Comment

by:ws1999
ID: 6475570
hello mansman

still when i save jpg file ,the program will tell me "bitmap image invalid", it seems only bitmap can be saved here is my code:

if OpenPictureDialog1.Execute then
  with Table1 do
begin
  //Button1.Enabled := false;
  FileStream := TFileStream.Create(OpenPictureDialog1.FileName, fmOpenRead);
  Table1.Edit;
  BlobStream := TBlobStream(CreateBlobStream(FieldByName('ThumbImage'), bmWrite));
  BlobStream.Seek(0,soFromBeginning);
  BlobStream.Truncate;
  BlobStream.CopyFrom(FileStream,FileStream.Size);
  FileStream.Free;
  BlobStream.Free;
  Table1.Post;
  //ReadPicFromDB;
  //Button1.Enabled := True;
end;

what will be the problem?

worried ws1999

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Expert Comment

by:Mohammed Nasman
ID: 6475782
send me email, and  i will send you the full project
i tried it with oracle database, access, and paradox without any modification, just change the alias
send me email at nasman@mogaza.org
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Author Comment

by:ws1999
ID: 6475868
wu_song@sohu.com
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ws1999:

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