Blob in forms 9i

Hi Friends,
I want to know that how can we (handle) save images in database in blob data format using forms 9i.
Is it jsut like as we do in forms 6i or there is difference ?
Raza Ullah Khan

Hello,
Use READ_IMAGE_FILE if images are stored on the Application Server or CLIENT_READ_IMAGE_FILE (Webutil) if they are stored on the client machine.
Francois

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Show BLOB in Forms 6i

Hello:
I've got a table with a BLOB field.
I saved an image or another document using DBMS_LOB package.
Now I want to show it in a Form(6i).
I found this rutine but i don't know how show the blob field in a form.
Could anybody help me, please ?
Thanks.
DECLARE
ac BLOB;
amount BINARY_INTEGER;
offset INTEGER;
buf RAW(2000);
BEGIN
/* select the LOB from which to read and return the locator into 'ac' */
SELECT audio_clip INTO ac FROM multimedia_table WHERE id = 1;
/* open the LOB */
DBMS_LOB.OPEN(ac, DBMS_LOB.LOB_READONLY);
/* read the LOB value into 'buf' */
amount := 2000;
offset := 1;
DBMS_LOB.READ(ac, amount, offset, buf);
/* close the LOB */
DBMS_LOB.CLOSE(ac);
END;

You can directly use read_image_file built in to read an image from the clients system directly into a image object. And regarding form server crash, it is no where related to the form u are running. try to invoke forms runtime screen(which is available in forms installed software) and work with it.
And web.show_document cannot be used to open images from client side. As the form server will not recognise the clients file system.

Querying Blobs in Forms

In the publication 'Oracle 9i Developement' by Dan Hotka one of the form examples says copy from an image, say in Paint Shop Pro, and paste it into an Image item on the form. It commits ok but the image isnt displayed when i query the form. As an alternative, I have tried, successfully, to load the image directly into the table using DBMS_LOB techniques but querying the form still wont show the image.
Any answers or suggestions folks?

Thanks Shay, but i still need some questions answered by anyone out there who has expereienced the same problem.
I used read-image-file in a 'When-image-pressed' trigger to insert the image. It did'nt work with message '47100 - Cant read image file ...'. I noticed other images in the example tables where all around 100k so i resized mine from 900k to 100k and tried again and it worked and committed but it still wouldnt return the image in a query. I then loaded the image through a procedure using DBMS_LOB and then queried the record in Forms and it worked. So
Why wouldnt the larger image work, i thought blobs were up to 4gb and
Why is Forms not commiting the image to the database
Anyone more answers or ideas?

Swing/bc4j - not visible gif stored in blob thru forms

I have problem with displaying gifs stored in blob column through Forms. If the very same files are stored through swing client they are visible in both swing and forms application.
In thread Displaying jpeg in JSP I saw that the reason for irregular blob behaviour could be its "forms background". What is exactly problem?
Is it possible to update blob column in database somehow (reloading over 2000 gifs will be pretty uncomfortable and slow) ?
I am using JDev 9.0.5.1 build 1605, DB 8.1.7., Forms 6i.

It appears that Forms, while storing gifs, uses compression apparently not handled by JUImageControl. More on Metalink 16035040.6

Insert doc/pdf/jpg into BLOB using forms (web based)

Hi All,
we have 81741 db on window2000(data server), forms6.0.8.20.1 on windows2000(webserver)
& users using IE6/netscape as setup. User wants to store a pdf/doc/jpg file (stored on his PC)
into database.
He wants ability to view this pdf/doc/jpg later & have ability to download again to his pc. Please note
that we have web based setup & not using HTTP server (using WebDB listener).
I am planning to use BLOB to store the table in database, but cannot figure out what/how to force forms
to do this.
If someone has done this before, could you please update this thread on how to proceed.
Thanks a lot for your input...
Abhi.

AS far as inserting images you can use the image item in Oracle Forms and base it on a blob column in the database.
Regarding the other types of data you can upload them to the database using a Java function on the application server (use the java importer from Forms to call the Java class). You can use another Java function to retrieve the info from the database to the application server, and then use web.show_document to get the file from the application server to the client.
Or you can wait a few weeks for the Webutil utility that will have this functunality built into it.

Loading a blob from forms ?

I would like to know if anyone has loaded a file into the
database in a blob field with forms not using OLE in client
server mode.

Well, sorry for the delayed response.
You can load Word Documents also in forms. For this you have to
use OLE interface.
Just, create an OLE container for your database item (say,
notes_text) and use the following code for loading the document
to that item.
FORMS_OLE.INITIALIZE_CONTAINER (:notes_text, '<file_name>');
FORMS_OLE.CLOSE_SERVER (:notes_text);
The above code will initialize the OLE container with specified
document. After initializing the OLE container, just commit the
record to save the document into database.
Hope the above helps you.
Best Wishes,
Ganeasn

Read/Write pdf's as blobs using forms 10g

Hi All,
I have a table called IMAGES in which i store the pdfs as blobs.
It was successfully working fine with me when I was using forms 6i.
Recently I installed oracle 10g and just found that 10G doesnt support OLE.
I came to know about WEBUTIL package and I have already included in the form.
Could you please help me out how can utilize this WEBUTIL package to read/write blobs from database.
If you have already developed any code like that, could please forward me?

The WebUtil_file_transfer.client_to_db and db_to_client will give you direct access to read and write to the blob - I think the Demo form on
http://www.oracle.com/technology/products/forms/htdocs/webutil/webutil.htm
has an example of this

Inserting to BLOB from Forms 6i

I need to take one of the following file types from a client machine and insert it into a BLOB column on the database:
Word, Excel, PDF, MS Project, GIF or JPG
I am using oracle forms 6i, the database is Oracle 9.2.
To get the file into the form, I believe I need to have the blob column defined as an ole_container. To put the file into the container, I need something like this:
:blob_name := GET_FILE_NAME('c:\');
if :attchmnt_name is not null
then
Initialize_Container('ATTCHMNT_FILE',:blob_name);
end if;
Am I missing something here?

Thanks for your response, Harish.
Unfortunately, I am still unable to connect to the database under Forms 6i or SQL*Plus 8.0 (under Oracle - OraHome81).
I have tried to modify the TNSnames.ora file as you suggested, but since there are several TNSnames.ora files under similar directory, I cannot be absolutely sure if I have modified the specific file that you intended me to. Below are the directories of the files that I tried to modify:
* Oracle\OraDev\NET80\ADMIN
* Oracle\OraAppSvr\NET80\ADMIN
* Oracle\oraenterprise\NET80\ADMIN
* Oracle\Ora81\NETWORK\ADMIN
Enclosed is also the modification that I added in the TNSnames.ora:
orcl.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = tcp.world)
(PROTOCOL = TCP)
(Host = oracle.cba.uh.edu)
(Port = 1521)
(CONNECT_DATA = (SID = ORCL)
Moreover, I am also not sure about your last suggestion to add environmental variable in the registry of Forms. I would really appreciate it if you can elaborate on this.
Again, thanks very much for your help, Harish. I greatly appreciate it.

BLOB in Forms 6i

Hello
I have inserted the pdf and excel files in the blob column of the table.
Please anyone can tell me how to open these files in the Forms 6i.
Thanks and Regards
Laila Mac

Hi
U can use OLE Container for this purpose.Please Add OLE as a database item name of the column name should be the name of BLOB column in the table.During execute query it automatically fetch excel sheet that you stored in your database to OLE item.
Regards
Ahamed

Retreving Image from Blob in forms 6

I am using forms 6 and oracle 9i.i have an image item and on when_button_press trigger i insert an image into the image_item by calling the read_image_file function and then save that image into the database.it gives me a message that 1 transactoion applied and saved. now i want to to retrived that image from database into form.how should i do it.also how will i know whether my image has been saved or not.when i tried to execute query i got message query caused no records to be retreived.
my table name is test_images and i have one column image(blob)

your test_image table better to have another primary key item like file_id number with table trigger to sequence generating its value for IF INSERTING event, or it will have no handle to get the image back.

Using BLOB on FORM

Hi,
I m using form 6i becoz my pc can only support up to 6i.
But I just upgraded my server from Oracle 8.0 to 9i and now that I have a new table with image, I created the field to be a BLOB field.
However, in old days, I uses LongRaw and I save my images using the following:-
READ_IMAGE_FILE(filename, 'BMP', 'logos.logo')
it works perfectly, I can save and retrive from both form and report.
Now, it don't work anymore... Any advices?
Thanks

Hi Hema
if ur problem is for displaying and saving data in the oracle (engine,tools),then u should choose Arabic char. when u setup the oracle 9i engine & the tools.
ok
And these a quick solution for ur problem to avoid the unistsall of the oracle,follow these steps:
Goto start>run, then write regedit,then press enter,when the registry editor open double click the my computer if it appear only, then double click HKEY_LOCAL_MACHINE, software,find oracle floder then search for NLS_LANG (also you can press F3 for quick search),then see the values in it (but don't change the values that ar NA) to ARABIC_EGYPT.AR8MSWIN1256
ok
you must write it in a captial form.
try these and tell me what's the results.
:)

How can I open different binary files from BLOB column ?

If we store some type of binary file (XLS, DOC, PDF, EML and so on, not only pictures) in BLOB column how can I show the different contents? We use designer and forms 9i with PL/SQL.
How can I copy the files from BLOB to file in a directory or how can I pass BLOB's content to the proper application directly to open it?

The mime type is just a string as explained above (e.g. application/pdf...). There are lot of samples here and on metalink.
E.g. add a column mime_type varchar(30) to your blob table. Create a procedure similar to the following:
PROCEDURE getblob
(P_FILE IN VARCHAR2
IS
vblob blob;
vmime_type myblobs.mime_type%type;
length number;
begin
     select document, mime_type into vblob,vmime_type from myblobs where docname = p_file;
     length := dbms_lob.getlength(vblob);
     if length = 0 or vblob is null then
     htp.p('Document not available yet.');
     else
     owa_util.mime_header(vmime_type);
     htp.p('Content-Length: ' || dbms_lob.getlength(vblob));
     owa_util.http_header_close;
     wpg_docload.download_file(vblob);
     end if;
exception
     when others then
     htp.p(sqlerrm);
END;
Create a DAD on your application server (refer to documentation on how to create a DAD).
Display the blob from forms (e.g. on a when-button-pressed trigger):
web.show_document('http://myserver:port/DAD/getblob?p_file=myfilename','_blank');
For storing blobs in a directory on your db server take a look at the dbms_lob package.
For storing blobs in a directory on your app server take a look at WebUtil available on OTN.
HTH
Gerald Krieger

Problem w/ image item using 9i BLOB field and InterMedia ORDImage Object

Hi,dear all,
I have a problem with image item in Form 6i. Oracle 9i is used as backend DB, and a table contains image data is created for testing:
create table image_test(
id number,
image blob
In Form 6i, there is no problem to create a block for inserting/updating the image record into the database. However, it can not be used to retrieve image (blob field), the image item remains empty after 'execute query', while the id field can be retrieved. When the same table is created in Oracle 8.1.7, and the exact same form can be used without any problem both in inserting and retrieval. It seems that the Oracle 9i does not use the same way to store BLOB column. Has anybody ever encountered this problem? How to retrieve image (BLOB) in Form 6i from Oracle 9i?
I tried to use interMedia ORDImage as the data type in Oracle 9i, that is,
create table image_test(
id number,
image ORDSYS.ORDImage
Same problem, the form can insert record with image, but when retrieving, nothing displayed. Anybody could help! Thanks in advance!

hi!
well working with oracle8i and form6i.
same problem..but i used (instead of blob or clob as datatype..) Long raw..
it can be saved as usual..i mean Commit..
and can be retrieved..using Execute_Query..its working fine..
well if anybody get any other solution..do inform..
mail_id:
[email protected]

How to open PDF stored as blob

Hi,
How can i open PDF that is stored in the database as BLOB from Forms 10g. Any method to directly open the PDF instead of generating physical PDF file in AS and open in client by webutil.showdocument.
Thanks in advance

Hi,
The second option is not working here.
I have another solution
WEB.SHOW_DOCUMENT('http://abc.com/efg.pdf'); this open the pdf file in the browser without displaying
a blinking command prompt (as like in the option 1).
But in all the cases we are opening the physical file, I am looking to open directly from the BLOB column.
If I should first generate the physical file from the BLOB column, then plz help me to get the code
Thanks to both of you.

Forms6i, read and write Images to BLOB

I read and write jpg's to the database with this commands:
Read_Image_File (V_Filename, 'JPG', 'BILDER.IM_BILD');
Write_Image_File (V_Filename, 'JPG', 'BILDER.IM_BILD', No_Compression, Original_Depth);
My problem is, that forms stores a jpg-format to the db, that cannot be read from java-programs.
The other way, when java stores jpg's to the BLOB, then forms can work fine with this images too and java also...
What does forms do, when it stores jpg's to the db, so that other programs cannot use the images?
Gerd

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Blob in forms 9i

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