| logon screen [message #451317] |
Wed, 14 April 2010 00:46  |
dsora
Messages: 24
Registered: May 2009
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Junior Member |
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Hi All,
I am using default logon screen to allow user to login DB via forms. Code which is in on-logon trigger as follows.
DECLARE
connected BOOLEAN := FALSE;
tries NUMBER := 3;
un VARCHAR2(30);
pw VARCHAR2(30);
cs VARCHAR2(30);
n number;
BEGIN
SET_APPLICATION_PROPERTY(CURSOR_STYLE, 'DEFAULT');
WHILE connected = FALSE and tries > 0 LOOP
LOGON_SCREEN;
un := GET_APPLICATION_PROPERTY( USERNAME );
pw := GET_APPLICATION_PROPERTY( PASSWORD );
cs := GET_APPLICATION_PROPERTY( CONNECT_STRING );
LOGON( un, pw || '@' || cs,false);
IF FORM_SUCCESS THEN
connected := TRUE ;
else
set_alert_property('Stop',ALERT_MESSAGE_TEXT,'Invalid user name/password/connect string.');
n := show_alert('Stop');
END IF;
tries := tries - 1;
END LOOP;
IF NOT CONNECTED THEN
MESSAGE('Too many tries!');
RAISE FORM_TRIGGER_FAILURE;
END IF;
END;
When the first time logon screen appears I pressed 'Cancel' button. It is suppose to exit the logon form/application but it has connected to DB and entered into the block.
Can anyone please help me, if I am missing anything in the on logon trigger code or anything else.
[Updated on: Wed, 14 April 2010 00:49] Report message to a moderator |
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| Re: logon screen [message #451471 is a reply to message #451323] |
Thu, 15 April 2010 00:33  |
ammadahmed
Messages: 7
Registered: April 2010
Location: Pakistan
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Junior Member |
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Hi,
Actually when you press CANCEL on default login screen. Then sure ti will open you form. But it is not actually LOGON to the database. If you try to fetch the data it will not show you anydata. But this is default behavior of forms. It will open your form but actually it is not connected to the database. Because you did not provide any login information you just pressed cancel. It will vanished the default login screen and will open for you your designed form.
Hope its clear.
-Ammad
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| Re: logon screen [message #451593 is a reply to message #451317] |
Thu, 15 April 2010 10:06 |
dsora
Messages: 24
Registered: May 2009
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Junior Member |
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<Then sure ti will open you form. But it is not actually LOGON to the database.>
I am able query and manipulate the data (logged to DB)!!!.
user expects that application/login form will exit when presses on cancel... because user doesn't want to login.
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| Re: logon screen [message #453247 is a reply to message #451317] |
Wed, 28 April 2010 01:04 |
dsora
Messages: 24
Registered: May 2009
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Junior Member |
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Hi,
Thank you for your reply.
Quote:
Did you try to put
exit_form(no_validate);
into the "Cancel" WHEN-BUTTON-PRESSED trigger?
Can we change the code of default logon screen's Cancel button, which is invoked by LOGON_SCREEN built in, if so please let me know how to change the code.
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| Re: logon screen [message #453249 is a reply to message #453247] |
Wed, 28 April 2010 01:21 |
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Littlefoot
Messages: 21823
Registered: June 2005
Location: Croatia, Europe
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Senior Member
Account Moderator |
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Oh, I see! (At least, I *think* I do)
I don't know whether it is possible to do that or not, but I guess not. I thought that it is your logon form; sorry.
However: perhaps you could perform certain test in WHEN-NEW-FORM-INSTANCE trigger which would try to, for example, select from dual. If it succeeds, you are logged on. If not, exit form.
I wouldn't know what error is raised when you are not connected to a database and try to select something. I guess it is something like "not connected", like in this SQL*Plus example:SQL> connect scott/blabla@ora10
ERROR:
ORA-01017: invalid username/password; logon denied
Warning: You are no longer connected to ORACLE.
SQL> select 'x' from dual;
SP2-0640: Not connected
SQL>
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| Re: logon screen [message #453253 is a reply to message #451317] |
Wed, 28 April 2010 01:49 |
dsora
Messages: 24
Registered: May 2009
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Junior Member |
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Hi,
Thank you, My requirement is to come out of the application when user chooses 'Cancel' button, when asked to logon (i.e. by logon_screen buit-in).
But when I press 'Cancel' button application is logging to DB and opening the first navigable block, which should not happen.
Quote:However: perhaps you could perform certain test in WHEN-NEW-FORM-INSTANCE trigger which would try to, for example, select from dual. If it succeeds, you are logged on. If not, exit form.
Why do I need to code in WHEN-NEW-FORM-INSTANCE trigger. If so then what is the use 'Cancel' button in default logon screen.
My question/doubt is why logon screen allowing user to login though (s)he does not want to login (user want to come out by pressing 'Cancel').
[Updated on: Wed, 28 April 2010 01:59] Report message to a moderator |
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| Re: logon screen [message #453321 is a reply to message #453253] |
Wed, 28 April 2010 04:42 |
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Littlefoot
Messages: 21823
Registered: June 2005
Location: Croatia, Europe
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Senior Member
Account Moderator |
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sateesh240@gmail.com wrote on Wed, 28 April 2010 08:49Why do I need to code in WHEN-NEW-FORM-INSTANCE trigger. If so then what is the use 'Cancel' button in default logon screen.
It is a (possible?) workaround. I don't know why Cancel doesn't work as your users would like it to. I don't know what code really stands behind that button. But, if it doesn't work and you can't modify default logon form, I guess you'll have to develop your own solution(s). WHEN-NEW-FORM-INSTANCE with EXIT_FORM *might* be one of them.
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