Kent -
Can you give an example of how you did this? I used an ArrayList
in my form, with one entry per select element in my form. This
works fine when only single options can be selected, but I can't
get it to work with
In my JSP I want to generate a variable number of multiple select
boxes containing values taken from a Hashtable containing
ArrayLists of beans (one entry in the Hashtable for each box):
<% int n = 0; %>
<%
prop = "attList[" + n + "]";
n++;
%>
In the associated form bean, I use an ArrayList named attList which will
contain the variable number of String[] arrays of selected values passed
back from my select boxes. So I have my getter and setter thus:
public String[] getAttList(int idx) {
return (String[])attList.get(idx);
}
public void setAttList(int idx, String[] keys) {
attList.set(idx, keys);
}
But the problem is that this collapses in BeanUtils.populate with a
type mismatch error:
javax.servlet.ServletException: BeanUtils.populate
at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:486)
Root cause:
java.lang.IllegalArgumentException: argument type mismatch
at java.lang.reflect.Method.invoke(Native Method)
at
org.apache.struts.util.PropertyUtils.setIndexedProperty(PropertyUtils.java:688)
There is no problem when I remove the multiple=true from the select element
and use the following:
public String getAttList(int idx) {
return (String)attList.get(idx);
}
public void setAttList(int idx, String key) {
attList.set(idx, key);
}
I've already posted this problem once, but answer came there none.
Michael
-Original Message-
From: Kent Roylance [mailto:[EMAIL PROTECTED]]
Sent: Friday, August 17, 2001 2:50 AM
To: [EMAIL PROTECTED]; Anthony Xin Chen
Subject: RE: Re[2]: Multiple input fields
Actually, you can do one better than that. Just pass in beans to the
form(can have collections in them), and that way you don't have to put a
bunch of attributes and getter/setters in your form. Of course you will
need a getter for your bean that you put in your ActionForm. As a result,
my ActionForms are very thin, take advantage of reuseability, better
performance, and alot less work.
Learned trial and error on this one,
Kent
-Original Message-
From: Anthony Xin Chen [mailto:[EMAIL PROTECTED]]
Sent: Thursday, August 16, 2001 6:48 PM
To: SUPRIYA MISRA
Subject: Re[2]: Multiple input fields
Hello there,
Although I have not tried it personally, I read from the list that it
can be done if your ActionForm provides a setter which takes a
collection and a getter which returns a collection.
Thursday, August 16, 2001, 5:03:15 AM, you wrote:
SM> No the last category will overwrite the previous ones. You need to add
an
SM> integer to category.
SM> <%int x= 0 ;%>
SM>
SM> <%x++;%>
SM> " value="">
SM> request.getParameterValues("category0")
SM> request.getParameterValues("category1")
SM> The best option is to loop it the value of x times;
>>From: [EMAIL PROTECTED] (Andrew Myers)
>>Reply-To: [EMAIL PROTECTED]
>>To: [EMAIL PROTECTED]
>>Subject: Multiple input fields
>>Date: Thu, 16 Aug 2001 02:22:02 -0400
>>
>>Is it possible to have multiple input fields with the same name?
>>
>>Eg. In regular HTML I would do this
>>
>>
>>
>>
>>
>> Category
>> Description
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>...
>>
>>
>>
>>
>>
>>
>>Then when access all the parameters by calling
>>request.getParameterValues("category")
>>Can ActionForm Beans handle multiple values with the same field name? If
>>so how is this achieved?
>>
>>Thanks,
>>Andrew.
>>
>>
>>__
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SM> _
SM> Get your FREE download of MSN Explorer at
http://explorer.msn.com/intl.asp
--
Best regards,
Anthony
