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
> 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]
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
