Validation

[Garandi Garandi]

I am reading data from database and display it with a checkbox. So number of checkboxes are dynamic, I could have 1 to n check boxes.
I want the user to check all of the boxes before submitting the form.
Question: In validation how to validate that all boxes are checked, since number of boxes are dynamic?

My JSP page

  
<%@ taglib uri="/tags/jstl-core" prefix="c" %>
<%@ taglib uri="/tags/fmt.tld" prefix="fmt" %>
<%@ taglib uri="/tags/struts-html-el"   prefix="html" %>
 
 <table width="100%">
  <c:forEach var="element" items="${requestScope.ListOfThings}" >
 <tr>
 <td class="MYLABEL"> 
       <html:multibox property="docs" value="${element}" /><c :-o	 ut value="${element}" /> 
   </td>
</tr> 
 </c:forEach>
  
  </table>

Thank you in advance
Garandi

[alan do]

i hate to say this up front, but why have checkboxes if they're gonna be checked anyway? can't you display a fake 'checked' images and keep the values in a hidden field?
<p />
in any case, you'll need to do custom validation.
1. pass the number of items into a hidden field (you can use the varStatus attribute of the c:forEach tag to keep a counter, or have it passed to the page in the request, or set it in the action using form.set("hiddenFieldName",checkboxCollectionCount)).

2. add a custom validation method to check the number of checkboxes checked agains the value in the hidden field (see this link - validateTwoFields example for how to set up custom validation - http://struts.apache.org/userGuide/dev_validator.html)