Why render attribute not working after commandButton is clicked?

[huahsin68]

There is a text field, a data table, and a button in a form. Imaging I enter some string in text field, click on the button, a list of data will output into data table. Anyhow, I am not able to render the table the output, but I have check the backing bean did return the result list.

May I know how could I render the table after clicking on the button?

Here is the code:

< h:form > 
  < table border="0" cellpadding="5" bgcolor="#FFFFFF" > 
    < tr > 
      < td > 
        < h:outputLabel value="#{msg.Label_FieldA}"/ > 
      < /td > 
      < td > < /td > 
      < td > 
        < h:inputText value="#{theVo.FieldA}"/ > 
      < /td > 
      < td > < /td > 
      < td > 
        < a4j:commandButton action="#{theBean.doSearch}" value="#{msg.Label_Search}" execute="@form" render="tablePanel" id="Search"/ > 
      < /td > 
    < /tr > 
    < tr > 
      < td > 
        < h:panelGroup id="tablePanel" > 
          < rich:dataTable var="theResult" value="#{theVo.resultList}" > 
             ...
          < /rich:dataTable > 
        < /h:panelGroup > 
      < /td > 
    < /tr > 
  < /table > 
< /h:form >

THanks @!