안녕하세요. 최용일입니다. BLOB필드에 파일을 저장하고 불러오는 팁입니다.
If you develop a database related software, then very popular task is to save some files (documents/images/reports/etc) in some BLOB field of table and use these saved data later.

In this tip I want to show how this task could be solved.

To save a file to BLOB:

blob := yourDataset.CreateBlobStream(yourDataset.FieldByName('YOUR_BLOB'), bmWrite);
try
  blob.Seek(0, soFromBeginning);

  fs := TFileStream.Create('c:your_name.doc', fmOpenRead orfmShareDenyWrite);
  try
    blob.CopyFrom(fs, fs.Size)
  finally
    fs.Free
  end;
finally
  blob.Free
end;

To load from BLOB:

blob := yourDataset.CreateBlobStream(yourDataset.FieldByName('YOUR_BLOB'), bmRead);
try
  blob.Seek(0, soFromBeginning);

  with TFileStream.Create('c:your_name.doc', fmCreate) do
    try
      CopyFrom(blob, blob.Size)
    finally
      Free
    end;
finally
  blob.Free
end;

Using this code you can work with any database engine (BDE/ADO/DAO/ODBC/DBISAM/etc) and any file format (document of MS Word, spreadsheet of MS Excel, bitmap or jpeg pictures, wav-files etc)

출처 by Delphi3000 ^^ 항상 즐코하세요...


질문하신 내용에 딱 맞는 답변은 아니겠지만, 이를 참고해서
구현하셔야 겠네요.

그럼.