Dynamic selection of <option> in a JSP

[Oogway Tan]

Hi !

I have a JSP with html <select><option></option></select>. On initial load, a specific entry is selected with the <option> attribute of 'selected'. Based on a servlet result, can the selected <option> be changed - back and forth multiple times ? And if so, how ?



Cheers,
Oogway.

[Paul Clapham]

When you generate the HTML -- which is what you are doing with that JSP -- you can flag one of the options with the "selected" flag using the <c:if> element of JSTL.

However I'm not sure that was the question you were asking. There was something about "initial load", which sounds like what happens in a browser. That's irrelevant to JSP, as the JSP is just generating the HTML for the browser. And you asked whether the selected option could be changed, which also doesn't make sense -- who or what would be changing it?

[Oogway Tan]

Hi !

Explaining it a bit further, the .jsp is -

    <tr>
       <td class="id"><label for="sC">sC</label></td>
       <td class="value">
<% if (!zSC) { %>
<%@ include file="xyz.jsp.inc" %>
<% } else { %>
<%@ include file="ijk.jsp.inc" %>
<% } %>
       </td>
    </tr>

xyz.jsp.inc is

<select class="select01" name="sC" id="sC" >
	<option value="">** Select **</option>
	<iterator id="sC" name="<%= SC %>" type="Java.class">
<% 		if (sC.isFirst()) {
			sC.next();
		} 
		int rowNum = sC.getRow();
		if (rowNum == 2) { %>
					<%@ include file="abc.jsp.inc" %>
<%		} else { %>
					<%@ include file="pqr.jsp.inc" %>
<%		} %>
	</iterator>
</select>

abc.jsp.inc is

<option <%= getSCS(sC.getRowKey().toString()) %>  value="<%= sC.getRowKey() %>" selected="selected"><%= sC.getString(1) %></option>

pqr.jsp.inc is

<option <%= getSCS(sC.getRowKey().toString()) %>  value="<%= sC.getRowKey() %>"><%= sC.getString(1) %></option>

This page gets called forward / backward as part of Struts Actions and also by way of a 'Refresh' button (Struts Action).

When the conditions are correct, the second <option> gets selected. But when the conditions are incorrect, the second <option> is still displayed, though I want the first <option> to be displayed.


Oogway.