File as blob upload and display an image
I created a browse file to store the files as BLOB in a table. File mail in table but are unable to view
File can be image, pdf, text, etc.
Found an example and tried to implement but can't get the image to display.
Do not know what Miss me?
I created an example
https://Apex.Oracle.com/pls/Apex/f?p=54811:1:7357315146564:
whiskers
I created a table
CREATE TABLE 'MY_BLOB '.
(VARCHAR2 (7) "IMAGE_KEY",)
VARCHAR2 (400) "IMAGE_FILENAME."
VARCHAR2 (48) "IMAGE_MIME_TYPE."
NUMBER OF "IMAGE_DOC_SIZE."
'IMAGE_CONTENT_TYPE' VARCHAR2 (255),
'BLOB_CONTENT' BLOB,
KEY ELEMENTARY SCHOOL ("IMAGE_KEY")
INDEX USING ACTIVATE
)
and ran the process to transfer the file as a BLOB in the table
declare
number of V_LENGTH;
number of image_pk_hld;
Whole CNT;
Start
Select doc_size from v_length
of wwv_flow_files
WHERE name =: P1_FILEBROWSE;
If v_length < = 1000000 then
Select count (*) in the my_blob cnt;
If cnt > 0 then
Select max (image_key) + 1 image_pk_hld
of my_blob;
on the other
image_pk_hld: = 100;
end if;
: P1_BLOB_PK: = image_pk_hld;
insert into MY_BLOB (IMAGE_KEY, IMAGE_FILENAME,
IMAGE_MIME_TYPE, IMAGE_DOC_SIZE, IMAGE_CONTENT_TYPE,
BLOB_CONTENT)
Select image_pk_hld, FILENAME, MIME_TYPE,
DOC_SIZE, CONTENT_TYPE, BLOB_CONTENT
of wwv_flow_files
WHERE name =: P1_FILEBROWSE;
delete from wwv_flow_files where name =: P1_FILEBROWSE;
on the other
delete from wwv_flow_files where name =: P1_FILEBROWSE;
commit;
raise_application_error (-20001,' cannot upload images larger than 1 MB!');
end if;
exception
while others then
raise_application_error (-20001, "Error when downloading image!");
end;
then tried to view the file (the file can be an image, text, pdf, etc.) in a region of pl/sql
declare
MimeType VARCHAR2 (255);
Start
Select IMAGE_MIME_TYPE in the mimetype
of my_blob
where IMAGE_KEY =: P1_BLOB_PK;
If the MIME type is not null or type MIME! = "THEN
HTP.p ("< img src =" display_image? p_image_id =' |: P1_BLOB_PK |') "" height = "'. 500 | » » / >') ;
on the other
HTP.p ('No Image');
END IF;
HTP.p (' ');
end;
procedure display_image
create or replace PROCEDURE display_image ()p_image_id IN VARCHAR2,( )
ACE
l_mime VARCHAR2 (255) ;
l_length number ;
l_file_name VARCHAR2 (2000) ;
lob_loc BLOB ;
Start
Choose IMAGE_MIME_TYPE BLOB_CONTENT
DBMS_LOB.getlength()BLOB_CONTENT() IMAGE_FILENAME
en l_mime, lob_loc, l_length, l_file_name
de my_blob
où image_key = p_image_id;
owa_util.mime_header ()NVL()l_mime "application/octet"() FALSE()
htp .p (' Content-length: ' | ) l_length );
owa_util.http_header_close
wpg_docload.download_file()lob_loc()
end display_image ;
pam499057 wrote:
Thanks for the reply.
I have given the procedure.
So I think that you must provide the credentials of developer to your workspace on apex.oracle.com so that we can investigate the problem.
examples uploading files a better way
See page 6 of the database Application example.
There is also a tutorial OBE which followed the introduction of the declarative BLOB support in 3.1 that is always topical in 4.x.
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