Joe, Henrique & Robert:
Thank you for replies, they all works :)
yours,
lei
On Mon, May 24, 2004 at 03:38:54PM -0500, Joe Germuska wrote:
> At 1:44 PM +0800 5/22/04, Ding Lei wrote:
> >Hello all,
> > There is an array(dsmccList) obtained by a self-defined tag,
> >and I wanna to send the length of the array
> > as an hidden property, as following:
> > <iPanel:appListData id='dsmccList'/>
> > <c:set var="dataCount" value="${dsmccList.length}"/>
> >
> > But this causes exception:
> >javax.servlet.jsp.el.ELException: The "." operator was supplied with
> >an index value of type "java.lang.String" to be applied to a List or
> >array, but that value cannot be converted to an integer.
>
> In JSTL 1.1 (JSP 2.0), you can use the 'length' function:
> http://java.sun.com/products/jsp/jstl/1.1/docs/tlddocs/fn/length.fn.html
>
> Short of that, no, there is no convenient way to do what you suggest
> without writing scriptlets. The JSTL Expression language expects the
> value to the right of a "." operator to be a bean property name, and
> neither arrays nor collections have methods that conform to bean
> property naming conventions that help you do this.
>
> Actually, rather than writing scriptlets, I usually define a second
> request-scoped variable that holds the length, or wrap the list in a
> bean of my own that translates between "getLength()" and array.length
> or collection.size()
>
> Maybe you can adjust your custom tag to define two variables, the
> list and another with the length of the list.
>
> Joe
>
> --
> Joe Germuska
> [EMAIL PROTECTED]
> http://blog.germuska.com
> "Imagine if every Thursday your shoes exploded if you tied them
> the usual way. This happens to us all the time with computers, and
> nobody thinks of complaining."
> -- Jef Raskin
>
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--
Yours,
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