Hi Have a look at DropDownChoice.setNullValid() and .setRequired()
Matt On 2010-03-18 14:26, David Chang wrote:
Hi, I am new in Wicket and am playing with different components. I have a two dropdown lists. One is a list of countries, required field, controlling another list of states/provinces via AjaxFormComponentUpdatingBehavior. The country list always has a blank (equivalent of "Choose one") as the first option in the list. When I select different countries, the state/province list changes accordingly. However, when I change to the blank in the country list, the state list stops updating. I looked into it and found out that in this situation (required droopdown list) selecting blank makes Wicket issue a feedback message instead of calling AjaxFormComponentUpdatingBehavior#onUpdate, which is what I want. What can I do to make Wicket the way I want? Thanks!
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