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From "MADISHETTY, ASHOK [AG-Contractor/8042]" <>
Subject RE: How to set the property of a drop-down select list from an action class?
Date Mon, 04 Sep 2006 09:46:42 GMT


You may try following:


Enumeration expenseTypeList = expenseTypes.elements();  // Vector of 

                                                ExpenseType class objects


ExpenseType type = null;


<select name='select'>


if (expenseTypeList != null) {

  while(expenseTypeList.hasMoreElements()) {

   type = (ExpenseType) expenseTypeList.nextElement();

 <option value='"+type.getTypeCode()+"'>+type.getTypeDescription()+</option>






This will display type description in list box and retrieve typeCode when
you call select.value();


Is that what you wanted?








-----Original Message-----
From: Tom Bednarz [] 
Sent: Monday, September 04, 2006 2:24 PM
To: Struts Users Mailing List
Subject: How to set the property of a drop-down select list from an action


I like to display a dop-down select list and select an apropriate entry 

from that list in an action:


This fills the list box:


<html:select property="expenseType">

   <html:options collection="expenseTypes" property="typeCode"




The expenseTypes is a Vector of the following class:



public class ExpenseType


   long typeCode;

   String typeDescription;


   public ExpenseType()




   public ExpenseType(long typeCode, String typeDescription)




     this.typeCode = typeCode;

     this.typeDescription = typeDescription;



   ... setters and getters




In my Action class I usually use the following code to populate the form 

with values from a business object:


PropertyUtils.setSimpleProperty(form, "expenseName", expense.getName());



How do I pre-select the correct entry in my drop-down list-box? In my 

business object I have a value that matches the typeCode of the above 

class but dispayed should be the typeDescription.


The collection is a vector, but I do not know the postition of the item 

to select, I only have its value. So I cannot use 

ProperyUtils.getIndexedProperty(..). But I can also not use 

getMappedProperty() since a vector has no keys....


So how is this done with Vectors? Or should in general Hashtables be 

taken for drop-down listboxes?





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