I just tried it works . The javascript function is the value specified in
Send Parameters with request and it correctly sends blank or the actual
value.
Im not sure what you mean by null value , in http a null would be the same
as not sending a parameter (and not sending it empty)
Is that what you want? If not can you please illustrate what your test is
and what you expect to happen ?

regards
deepak

On Fri, Oct 16, 2009 at 9:31 AM, Wei Z <[email protected]> wrote:

>
> Thanks deepak. I've tried this approach already, but whenever a null value
> was expected, it didn't work.
> It seems a null value just cannot be returned.
>
> Wei
>
> Deepak Shetty wrote:
> >
> > oh i think I had a space before the javascript and that's why it seemed
> to
> > work (as a space, not emptyu)
> >
> > You can always use __javaScript function to check the value of the
> > variable
> > against the default.
> > e.g. in the regex specify the default value as NOT_FOUND
> > and in the parameter specify
> > ${__javaScript('${YOUR_VAR}' == 'NOT_FOUND' ? '': '${YOUR_VAR}')}
> >
> > regards
> > deepak
> >
> > On Fri, Oct 16, 2009 at 1:59 AM, Wei Z <[email protected]> wrote:
> >
> >>
> >> Thanks for the reply deepak. Tried your suggestion, but it didn't work -
> >> returned the variable name "${variablename}" rather than a blank string.
> >> The reason I need a blank string is that I want to send back whatever
> >> values
> >> already on the page plus some comments. One of the existing values is a
> >> dropdown box. If a value has already been selected in the dropdown box
> >> when
> >> the page is opened, I will find a match. If a value has not been
> >> selected,
> >> the RegEx extractor will not find a match (i.e. the particular text
> >> phrase
> >> will not exist on the page). In case, I need to return a blank value -
> >> any
> >> other value will cause the request to fail.
> >> Is this a restriction of JMeter or is there a way to do this?
> >>
> >> Wei
> >>
> >> Deepak Shetty wrote:
> >> >
> >> > Truly fugly but
> >> > ${__javaScript('')} seems to work.
> >> >
> >> > I'd question why you need blank (would spaces work?) . other options
> >> would
> >> > be BSH listener to form the variable as you want.
> >> > regards
> >> > deepak
> >> >
> >> > On Thu, Oct 15, 2009 at 8:59 AM, Wei Z <[email protected]>
> wrote:
> >> >
> >> >>
> >> >> Hi,
> >> >> I want to return a value null (i.e. blank) if now matches are found.
> >> I've
> >> >> tried few things, e.g. leave the default value field blank, put a
> >> >> variable
> >> >> name in the field and define the variable to have value "", etc.
> >> >> But I just can't get a null value. Has anybody done this or does
> >> anybody
> >> >> know how to do this? Your help would be much appreciated.
> >> >>
> >> >> Wei
> >> >> --
> >> >> View this message in context:
> >> >>
> >>
> http://www.nabble.com/How-to-set-default-value-to-null-for-Regular-Expression-Extractor-tp25911259p25911259.html
> >> >> Sent from the JMeter - User mailing list archive at Nabble.com.
> >> >>
> >> >>
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> >> >>
> >> >
> >> >
> >>
> >> --
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> >>
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> >>
> >>
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> >
> >
>
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> Sent from the JMeter - User mailing list archive at Nabble.com.
>
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