In your action class, are you actually populating a List in your form before
forwarding to that page?
>From the error, it appears that getTableNames() on your form is returning
null.
--
James Mitchell
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, February 13, 2003 5:30 PM
Subject: using <bean:define>
> Hi,
>
> I am new to struts.
>
> I am trying to use the
>
> <html:options collection="tableNames"
>
> I get the error
>
> javax.servlet.jsp.JspException: Define tag cannot set a null value
> at
org.apache.struts.taglib.bean.DefineTag.doEndTag(DefineTag.java:272)
> at jsp_servlet.__mffs._jspService(__mffs.java:237)
>
>
> What am I doing wrong when I am trying to create the bean
>
> <bean:define id="tableNames"
> name="mffsActionForm"
> property="tableNames"
> type="java.util.List" />
>
> Regards
> Rajesh J
>
> Here is the JSP code
>
> <%@ page contentType="text/html;charset=UTF-8" language="java" %>
>
> <%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
> <%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic"%>
> <%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
>
> <html:html>
>
> <head>
>
> <title>MFFS</title>
> </head>
>
> <body topmargin="0" leftmargin="0">
>
> <table border="0" width="100%" height="100%" cellspacing="0"
cellpadding="0">
> <tr>
> <td width="100%" height="72" bgcolor="#000066" style="color: #FFFFFF">
> <strong><font size="8" face="ATSackLightRomNoBalls"><html:img
width="61"
> height="45" src="images/top.bmp" border="0"/>MFFS</font></strong></td>
> </tr>
> <tr>
> <td width="100%" height="20" bgcolor="#EAFFFF"> </td>
> </tr>
> <tr>
> <td width="100%" height="95%" valign="middle" align="center">
> <html:form
> action="mffsAction"
> name="mffsActionForm"
> type="lam.mffs.form.MffsActionForm"
> scope="session" >
> <p>
> </p>
> <table border="1" height="33" bordercolor="#000000"
bordercolorlight="
> #000000" bordercolordark="#000000">
> <tr>
> <td width="100" height="27" bordercolor="#FFFFFF"
bordercolorlight="
> #FFFFFF" bordercolordark="#FFFFFF" bgcolor="#e0ebf5"><font size="2">End
> Date</font></td>
> <td width="100" height="27" bordercolor="#FFFFFF"
bordercolorlight="
> #FFFFFF" bordercolordark="#FFFFFF" bgcolor="#e0ebf5"> <html:text property
> ="end_date" size="10"/></td>
> <td width="150" height="27" bordercolor="#FFFFFF"
bordercolorlight="
> #FFFFFF" bordercolordark="#FFFFFF" bgcolor="#e0ebf5"><font size="2">
Choose
> Table</font></td>
> <td width="200" height="27" bordercolor="#FFFFFF"
bordercolorlight="
> #FFFFFF" bordercolordark="#FFFFFF" bgcolor="#e0ebf5">
> <font size="2">
> <bean:define id="tableNames"
> name="mffsActionForm"
> property="tableNames"
> type="java.util.List" />
>
> <html:select property="tables" style="font-size: 10pt"
size="1">
> <html:options collection="tableNames" labelProperty
> ="labelProperty" property="property"/>
> </html:select></font></td>
> <td width="200" height="27" bordercolor="#FFFFFF"
bordercolorlight="
> #FFFFFF" bordercolordark="#FFFFFF" bgcolor="#e0ebf5"><font size="2">
Product
> Description</font></td>
> <td width="300" height="27" bordercolor="#FFFFFF"
bordercolorlight="
> #FFFFFF" bordercolordark="#FFFFFF" bgcolor="#e0ebf5"><font size="2">
> </font></td>
> <td width="130" height="27" bordercolor="#FFFFFF"
bordercolorlight="
> #FFFFFF" bordercolordark="#FFFFFF" bgcolor="#e0ebf5"><applet code
> ="fphover.class" codebase="./" width="120" height="24">
> <param name="color" value="#000080">
> <param name="hovercolor" value="#0000FF">
> <param name="textcolor" value="#FFFFFF">
> <param name="text" value="Get Data">
> <param name="effect" value="glow">
> </applet>
> </td>
> </tr>
> </table>
> <p>
>
> </p>
> </html:form>
>
> </td>
> </tr>
> </table>
>
> </body>
>
> </html:html>
>
>
> here is my formbean
>
> public class MffsActionForm extends ActionForm
> {
> private String tables;
> private List tableNames;
> private Date end_date;
> private List product_desc;
> public void setTables(String Tables)
> {
> this.tables = Tables;
> }
> public String getTables()
> {
> return tables;
> }
> public void setEnd_date(Date end_date)
> {
> this.end_date = end_date;
> }
> public Date getEnd_date()
> {
> return end_date;
> }
> public void setProduct_desc(List product_desc)
> {
> this.product_desc = product_desc;
> }
> public List getProduct_desc()
> {
> return product_desc;
> }
> public ActionErrors validate(ActionMapping actionMapping,
HttpServletRequest
> httpServletRequest)
> {
> /**@todo: finish this method, this is just the skeleton.*/
> return null;
> }
> public void reset(ActionMapping actionMapping, HttpServletRequest
> httpServletRequest)
> {
> tables = null;
> end_date = null;
> product_desc = null;
> }
> public List getTableNames()
> {
> return tableNames;
> }
> public void setTableNames(List tableNames)
> {
> this.tableNames = tableNames;
> }
> }
>
>
>
>
>
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