RE: wrong behavior of checkboxes in forms?

[Greg Lehane]

You should check the parameters in the HttpServletRequest object, from
what I gather, the request object is only populated with checkbox names
that are checked/true, when the form is submitted (not checkboxes that
are un-checked/false). Therefore you need to compare values of
checkboxes in your FormBean to ensure they're correct w.r.t. the values
in the request. So, you may have some checkboxes set to true in your
bean (from previous activity), that have been un-checked in the current
submission, you can tell if it has been un-checked by looking to see if
the checkbox name is NOT in the current request. The reset method is
called before the JSP loads (drags data from the FormBean), so you
should do something like this:

public void reset(ActionMapping mapping, HttpServletRequest request) {

  Enumeration params = request.getParameterNames();

  // look at vals in params & compare with checkbox vals in FormBean
  // i.e. set all checkbox names in request to true, and rest to false

}

Hope this helps

- Greg


-----Original Message-----
From: Brad Reneer [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 19, 2001 10:10 AM
To: [EMAIL PROTECTED]
Subject: RE: wrong behavior of checkboxes in forms?


I'm having the same problem.  Did you ever get this to work?

Thanks,
Bradley Reneer

-----Original Message-----
From: Hartmut Bernecker [mailto:[EMAIL PROTECTED]]
Sent: Mon, August 13, 2001 5:17 AM
To: [EMAIL PROTECTED]
Subject: Re: wrong behavior of checkboxes in forms?


Gregor Rayman schrieb:
> 
> "Hartmut Bernecker" <[EMAIL PROTECTED]> wrote:
> 
> > Hello,
> >
> > I have a checkbox in a form. If I check it and then submit the form,
> > then I receive the value "true" in the action when calling the
method
> > form.getMyCheckbox();
> >
> > But if I uncheck the checkbox and submit the form again, then I
receive
> > **again** the value true in the action when calling the method
> > form.getMyCheckbox();
> >
> > Who can help???
> >
> > Hartmut
> 
> Hi, there are two possible solutions:
> 
> 1) use request scope forms
> 2) implement the reset() method. (Which you should do anyway always,
when
> you use checkboxes)
> 
> --
> gR


I had implemented the reset() method:

    public void reset(ActionMapping mapping, ServletRequest request)
    {
        myCheckbox = false;
        [...]
    }

But anyway: the problem persists.