How can the dmf:listbox be populated dynamically?

vsoman1984

Hi Friends,

I have a requirement where i am filling my listbox on the basis of selected items on the dropdown box. The dropdown box gets populated dynamically. But i am unable to populate the listbox in a similar manner.

Consider the following snippet of my JSP:

<tr> <%= DummyComponent.identityOfTarget.size()%> </tr>   --- THIS YIELDS PROPER COUNT OF THE ARRAYLIST
<tr>
<td align="right"> 
<dmf:panel name="test">
<dmf:dropdownlist width="180" name="targetLangs" size='5' multiselect='true'  cssclass='BrowseNumberList' onselect="getListBoxSelectedValues" runatclient='true' id='searchlistbox'> 
<%
    for ( int d = 0; d < DummyComponent.identityOfTarget.size(); d++ ) {
        %><dmf:option id = '<%=DummyComponent.identityOfTarget.get(d).toString()%>' value='<%=DummyComponent.identityOfTarget.get(d).toString()%>' label='<%=DummyComponent.descriptnOTarget.get(d).toString() %>' />//THE ABOVE OPTION LINE DOES NOT SEEM TO WORK //<%} %>
</dmf:dropdownlist>

I have got 2 arraylists

1) identityOfTarget

2) descriptnOTarget

These arraylist do get filled from my code. An evidence of the fact is that the very first line gives me the size of the arraylist 'identityOfTarget'.

But the option does not seem to capture these elements (inside the for loop).

Could you please help me to find a solution to this situation ? The size of the array being printed properly, i am assuming that the part of my

code (both class (and its action events) and JSP) are functioning properly. Is my assumption correct?

Thanks & Regards

Vishnu Soman

udeleng

Instead of trying to build your control inline in the page, you should do it in the component class:

DropDownList ddlist = (DropDownList)getControl("targetLangs", DropDownList.class);

for (Object obj : identityOfTarget) {

     Option option = new Option();
     option.setLabel(obj.toString());
     option.setValue(obj.toString());
     ddlist.addOption(option);

}

And just a good design practice is not to expose your data through a public access modifier, such as the arrays you have in your example.