Using File Browse to update stored file

Question

Hi all,
I have a form with a File Browse item on it which is (surprisingly!) used to upload a file and associate with a record. The filename is stored in a varchar column in the table. This works fine when I create (INSERT) the initial record and I can retrieve the stored file just fine. However the problem I have is when I want to update the uploaded file. It seems the normal mechanisms for update / save requests don't apply to uploaded files. My other attributes get updated fine but the new uploaded filename is not reflected in the table.
I've put together a simple example of this on a when apex.oracle.com :
http://apex.oracle.com/pls/otn/f?p=40740
Which has two fields, a file name and an 'attribute'. Try as I might I can't update the file name although the attribute changes just fine.
Any suggestions will be much appreciated. I realise I may be missing something fundamental here and am more than happy to be enlightened.
FYI, the purpose for such functionality is to allow users of our system to store a photograph of themselves along with their details. This functionality is required to allow the photograph to be updated if required.
Thanks,
Steve

Answer 1

If i am not mistaking, using a file browser item type will not set the uploaded file (blob) in this item, to be processed in the standard processing on you're page.
In a recent project i wrote a stored procedure for handling with uploaded files. This procedure, which based on the filename ( Fnnnn/<filename> ) , select the uploaded content through apex_application_files, the location apex saves the files. and procedure outputted the file as a blob, which then can be used to insert/update in youre table
Hope this example code will help you:
procedure upload_bestand( p_file_name in varchar2
, p_file out nocopy blob
, p_filetype out nocopy varchar2 )
is
-- Cursor voor bepalen bestand uit apex_application+files
cursor c_file ( b_file_name in varchar2)
is
select aaf.filename
, aaf.mime_type
, aaf.blob_content
from apex_application_files aaf
where aaf.name = b_file_name
r_file c_file%rowtype;
begin
open c_file ( b_file_name => p_file_name );
fetch c_file into r_file;
if c_file%notfound
then
-- Upload van bestand niet geslaagd
close c_file;
raise e_file_err;
end if;
close c_file;
-- Geupload bestand uit temp_upload tabel verwijdern
delete from apex_application_files
where name = p_file_name
commit;
p_file := r_file.blob_content;
p_filetype := r_file.mime_type;
end upload_bestand;