Hi,
Thanks for the reply, but it does not work, still same error, i check the
LinkImpl:

  public void addParameter(String parameterName, String value)
    {
        Defense.notBlank(parameterName, "parameterName");
        Defense.notBlank(value, "value");

        if (parameters == null)
            parameters = CollectionFactory.newMap();

        parameters.put(parameterName, value);
    }

it is making sure the value is not blank, but I believe query string having
blank value is often.


Alexey Hanin wrote:
> 
> Just make it empty string when it's null:
> 
> lnk.addParameter("country", country == null ? "" : country);
> 
> On Mon, Nov 9, 2009 at 3:24 PM, Angelo Chen <angelochen...@yahoo.com.hk>
> wrote:
>>
>> Hi,
>>
>> I have a query string that I need to append to a  Link object, the query
>> string is:
>>
>> ?gender=M&country=
>>
>> I got two questions:
>>
>> 1) is there a simple way to append this string to a Link object instead
>> of
>> using addParameter?
>>
>> 2) if I do a lnk.addParameter("country", null) and I got following:
>>
>>  RequestExceptionHandler Unexpected runtime exception: Parameter value
>> was
>> null or contained only whitespace.
>>
>> and I need to make the country part of query string even it is null, any
>> idea? thanks,
>>
>> A.C.
>> --
>> View this message in context:
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>> Sent from the Tapestry - User mailing list archive at Nabble.com.
>>
>>
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> 
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> 
> 

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