Colin,
Thank you very much for your valuable code. It is a great x-mas gift for me and
works perfect now. Also very appreciate Richard tips, I am gona use these tips
in other features.
Happy x-mas to you guys.
--- Colin Capriati <[EMAIL PROTECTED]> wrote:
> Ali,
>
> Thank you for the details of your current problem/solution. Richard has a
> good point in that heavy dependence on JavaScript can be problematic. Your
> point about server resources when using session variables is valid as well.
> Ultimately then you will decide which will provide a bettor solution for
> your particular needs. If you decide to use JavaScript, here is a sample of
> what I was thinking.
>
> <input type="checkbox"
> ID="cb<%=colName%><%=rowno%>"
> name=""
> onchange="checkboxChangeed(this)">
> <input type="hidden"
> ID="h<%=colName%><%=rowno%>"
> name="0<%=colName%><%=rowno%>">
>
> <SCRIPT>
> function checkboxChangeed(field){
> var h = document.getElementById("h"+field.id.substr(2));
> h.name="1"+h.name.substring(1);
> h.value = field.checked;//Ali: I think you will know better than I how
> to handle the value.
> }
> </SCRIPT>
>
> Regards,
>
> Colin
>
> ----- Original Message -----
> From: "Ali Chadorbaf" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, December 14, 2001 11:55 AM
> Subject: Re: request.getParameter() question
>
>
> > Thanks for your reply. Still need more help.
> >
> > Actually this a checkbox issue. I my case i believe
> > your suggestions couldn't help me
> > (req.getParameterNames(). Also assign default value)
> >
> > Let's explain more:
> > On client: I have a JSP page like spread sheet(grid).
> > some of the columns may be checkboxs. As you know
> > checkbox will not pass a value to webserver when is
> > un-checked. If any column changed, it's name will
> > concatenated by 1. (field.name= "1"+field.name).
> >
> > On server: The servlet will only request for
> > changed-columns and update database.
> > request.getParameter("1"+col_name);
> >
> > This logic works good for all other tags except
> > checkboxs. Because cannot realize the
> > 1- checkbox is never changed.
> > 2- checkbox is changed to un-check.
> > Servlet must ignore the first case but update the
> > database for the second case.
> >
> > Thanks...Ali
> > --- Mark Galbreath <[EMAIL PROTECTED]> wrote:
> > > Or assign the parameter a default value.
> > >
> > > Mark
> > >
> > > -----Original Message-----
> > > From: Jeremy W. Redmond
> > > Sent: Friday, December 14, 2001 12:31 PM
> > >
> > > see if it is in the enumeration
> > > req.getParameterNames().
> > >
> > > -----Original Message-----
> > >
> > > value=request.getParameter("param_name");
> > >
> > > The above statement in called page will return null
> > > in
> > > two cases:
> > >
> > > 1-when the "param_name" is passed with no value
> > > 2-when the "param_name" didn't pass at all.
> > >
> > > How can I differentiate these two. I mean I need to
> > > somehow know whether
> > > Parameter did not pass or passed with no value.
> > >
> > >
> >
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