Wicket Framework DropDownChoice

Question

我试图在wicket框架中获取dropdownchoice的选定值,但我无法得到它.如何在dropdownchoice的更改事件中获取DropDownChoice的选定值？谢谢.一世

Answer 1

这很简单,你所要做的就是使用AjaxFormComponentUpdatingBehavior:

DropDownChoice<String> ddc = new DropDownChoice<String>("ddc", model, Arrays.asList("a", "b", "c"));
ddc.add(new AjaxFormComponentUpdatingBehavior("onchange") {
    @Override
    protected void onUpdate(AjaxRequestTarget target) {
        System.out.println("selected: " + model.getObject());
    }
});