Re: Reset button does not clear JSP fields
Instead of a reset you could use a simple button and the related onClick event to call a javascript that sets all field to . What do you think about this workaround? Take note that it isn't an expected behaviour for a reset button. I suggest you to name such a button with a value different from reset. What do you think about wipe or erase? Bye, aris. - Original Message - From: O. Oke [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, November 29, 2004 3:01 PM Subject: Reset button does not clear JSP fields Please help! Background == I retrieve data from the database, copy the data into an Action Form, the data is then automatically entered into corresponding fields. After viewing the data, I want the RESET button to empty all fields whenever it is clicked. Presently, after clicking the RESET button, all fields still have data. I believe the fields are repopulated with the data in the Action Form. Does the RESET button have to forward to an Action class that in turn replaces the relevant Action Form in the relevant scope with an Action Form that has no data? If not, can you please tell me the conventional Struts way of setting all JSP fields to empty. Note: In the reset method of the Action form, I set all fields to . Thank you. O. Oke ___ Moving house? Beach bar in Thailand? New Wardrobe? Win £10k with Yahoo! Mail to make your dream a reality. Get Yahoo! Mail www.yahoo.co.uk/10k - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Reset button does not clear JSP fields
-Original Message-
From: aris [mailto:[EMAIL PROTECTED]
Instead of a reset you could use a simple button and the
related onClick
event to call a javascript that sets all field to .
What do you think about this workaround?
Take note that it isn't an expected behaviour for a reset
button. I suggest
you to name such a button with a value different from
reset. What do you
think about wipe or erase?
Bye,
aris.
- Original Message -
From: O. Oke [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, November 29, 2004 3:01 PM
Subject: Reset button does not clear JSP fields
Please help!
Background
==
I retrieve data from the database, copy the data into
an Action Form, the data is then automatically entered
into corresponding fields.
After viewing the data, I want the RESET button to
empty all fields whenever it is clicked. Presently,
after clicking the RESET button, all fields still have
data. I believe the fields are repopulated with the
data in the Action Form.
Does the RESET button have to forward to an Action
class that in turn replaces the relevant Action Form
in the relevant scope with an Action Form that has no
data? If not, can you please tell me the conventional
Struts way of setting all JSP fields to empty.
There is no conventional method. I recommend that you
avoid html:cancel because it is slightly confusing.
The way I did is, is assume that RESET or REVERT button
is just same behaviour to a SUBMIT button in terms of Struts
See below
Note: In the reset method of the Action form, I set
all fields to .
Thank you.
O. Oke
====
What kind of reset functionality do you need ?
1. Reset as in Clear
Clear all the input fields in a HTML Form to be blank.
2. Reset as in Revert
Change all the input fields back to their original values,
before the user edited the form.
With (1) you can write a function with JavaScript to navigate
your around the DOM for your HTML Form element. You can
make an Struts Action that clears the ActionForm for you
(the so-called going back to the server option).
With (2) you can program it with JavaScript, quick tricky
to do but not impossible. It is much easier to do this
inside server side Java. You will need to make the ActionForm
session scope. It will have to have to duplicate beans or
delegated beans inside, but if you know Commons BeanUtils
you can copy the value of one bean to another easily.
I would use delegated beans for this to implement (2) revert
class EmployeePayrollBean { ... }
class SomeDahForm extends ActionForm {
EmployeePayrollBean payroll = ... ;
EmployeePayrollBean payroll_backup = ... ;
// assume getter/setter methods exists
}
In the Action itself
class SomeTypeOfAction extends Action {
public void execute( ... ) {
if ( button.equals(REVERT) {
BeanUtils.copyProperties(
yourform.getPayroll(),
yourform.getPayrollBackup() );
// forward request back to JSP/view
}
}
}
Because of the nested properties in Struts/Commons BeanUtils/JSTL the
above shouldn't be a problem for creating a JSP.
It is trivial to take the Common BeanUtils API to write a ``GenericBean''
resetter that will reset all properties of a POJO to
either 0, 0.0F, 0.0, , null
(but be very careful list Java Collections!!!)
HTH
--
Peter Pilgrim
Operations/IT - Credit Suisse First Boston,
10 South Colonnade, London E14 4QJ, United Kingdom
Tel: +44-(0)207-883-4497
==
This message is for the sole use of the intended recipient. If you received
this message in error please delete it and notify us. If this message was
misdirected, CSFB does not waive any confidentiality or privilege. CSFB
retains and monitors electronic communications sent through its network.
Instructions transmitted over this system are not binding on CSFB until they
are confirmed by us. Message transmission is not guaranteed to be secure.
==
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
RE: Reset button does not clear JSP fields
I'm not sure how tricky it is in JavaScript...
function doit(obj) {
obj = obj.form;
i = 0;
while (obj.elements[i] != null) {
if (obj.elements[i].type.toLowerCase() != button) {
obj.elements[i].value = ;
}
i++;
}
}
Attach this to the onClick event of a button in the form you want to clear,
passing this as the argument, and that should do the trick. You might have
to tweak it a little bit (for instance, I'm not sure it will clear file type
input fields, checkboxes or radios), but it's probably close. Depends on your
requirements and whether the round-trip to the server is acceptable or not. I
tend to want to avoid any server trips I can, and something like this seems
like a purely GUI function, so strikes me as a place whether the server doesn't
need to be involved.
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
On Mon, November 29, 2004 11:25 am, Pilgrim, Peter said:
-Original Message-
From: aris [mailto:[EMAIL PROTECTED]
Instead of a reset you could use a simple button and the
related onClick
event to call a javascript that sets all field to .
What do you think about this workaround?
Take note that it isn't an expected behaviour for a reset
button. I suggest
you to name such a button with a value different from
reset. What do you
think about wipe or erase?
Bye,
aris.
- Original Message -
From: O. Oke [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, November 29, 2004 3:01 PM
Subject: Reset button does not clear JSP fields
Please help!
Background
==
I retrieve data from the database, copy the data into
an Action Form, the data is then automatically entered
into corresponding fields.
After viewing the data, I want the RESET button to
empty all fields whenever it is clicked. Presently,
after clicking the RESET button, all fields still have
data. I believe the fields are repopulated with the
data in the Action Form.
Does the RESET button have to forward to an Action
class that in turn replaces the relevant Action Form
in the relevant scope with an Action Form that has no
data? If not, can you please tell me the conventional
Struts way of setting all JSP fields to empty.
There is no conventional method. I recommend that you
avoid html:cancel because it is slightly confusing.
The way I did is, is assume that RESET or REVERT button
is just same behaviour to a SUBMIT button in terms of Struts
See below
Note: In the reset method of the Action form, I set
all fields to .
Thank you.
O. Oke
====
What kind of reset functionality do you need ?
1. Reset as in Clear
Clear all the input fields in a HTML Form to be blank.
2. Reset as in Revert
Change all the input fields back to their original values,
before the user edited the form.
With (1) you can write a function with JavaScript to navigate
your around the DOM for your HTML Form element. You can
make an Struts Action that clears the ActionForm for you
(the so-called going back to the server option).
With (2) you can program it with JavaScript, quick tricky
to do but not impossible. It is much easier to do this
inside server side Java. You will need to make the ActionForm
session scope. It will have to have to duplicate beans or
delegated beans inside, but if you know Commons BeanUtils
you can copy the value of one bean to another easily.
I would use delegated beans for this to implement (2) revert
class EmployeePayrollBean { ... }
class SomeDahForm extends ActionForm {
EmployeePayrollBean payroll = ... ;
EmployeePayrollBean payroll_backup = ... ;
// assume getter/setter methods exists
}
In the Action itself
class SomeTypeOfAction extends Action {
public void execute( ... ) {
if ( button.equals(REVERT) {
BeanUtils.copyProperties(
yourform.getPayroll(),
yourform.getPayrollBackup() );
// forward request back to JSP/view
}
}
}
Because of the nested properties in Struts/Commons BeanUtils/JSTL the
above shouldn't be a problem for creating a JSP.
It is trivial to take the Common BeanUtils API to write a ``GenericBean''
resetter that will reset all properties of a POJO to
either 0, 0.0F, 0.0, , null
(but be very careful list Java Collections!!!)
HTH
--
Peter Pilgrim
Operations/IT - Credit Suisse First Boston,
10 South Colonnade, London E14 4QJ, United Kingdom
Tel: +44-(0)207-883-4497
==
This message is for the sole use of the intended recipient. If you
received
this message in error please delete it and notify us. If this message was
misdirected, CSFB does not waive any confidentiality or privilege. CSFB
