Urgent Help Required with Checkboxes!

[J Ho]

The problem I have is trying to default a checkbox on the initial load of the page, but then be set to whatever it is on submit.ie
I have two checkboxes, Assessed, and Non-Assessed. I want Non-Assessed to be defaulted to checked the first time the user views the page. However, the user can uncheck this box when he submits the page.
How would I achieve this? I've tried "setNonAssessed(true)" on the property in the action form's contstructor, and then adding a "setAsssessed(false)" statement to the reset method of the actionform, but this just causes the Non-Assessed box to be "rechecked" after I've submitted the form. I'm stumped ...
thanks in advance!
Jason

[Marc Peabody]

Part of some of your frustration may stem from the fact that browsers typically do not submit a checkbox variable when it is unchecked.
Radio buttons seem more appropriate for your situation. Everything is either Assessed or Non-Assessed - always one but never both, right?
The following should do what you require.
ActionForm code:
private String rad = "Non-Assessed";
public String getRad(){
return this.rad;
}
public void setRad(String rad){
this.rad = rad;
}
JSP:
<html:radio property="rad" value="Non-Assessed"/>Non-Assessed<br>
<html:radio property="rad" value="Assessed"/>Assessed<br>

[J Ho]

Thanks for the reply Marc, but I do require the case of "both" to be selected at the same time if need be.. I have implemented the checkboxes by manually doing the necessary logic in the actionform and setting the appropriate bean values.. but I was wanting to try and do it with the struts tags.. so if anyone does come up with a solution please let me know ...
J

[Marc Peabody]

This is the best I could come up with.
ActionForm -

private String[] resetter = {};
private boolean firstVisit = true;
private String[] selectedItems = { "Non-Assessed"};
private String[] items = { "Non-Assessed", "Assessed" };
public String[] getSelectedItems(){
return this.selectedItems;
}
public void setSelectedItems(String[] selectedItems){
this.selectedItems = selectedItems;
}
public String[] getItems(){
return this.items;
}
public void reset(ActionMapping mapping,
HttpServletRequest request) {
// Reset field values here.
if(firstVisit){
// Do not reset on first visit
firstVisit = false;
}else{
selectedItems = resetter;
}
}

JSP - *** refers to the name attribute of form-bean in struts-config

<logic:iterate name="***" id="item" property="items">
<html:multibox property="selectedItems">
<bean:write name="item"/>
</html:multibox>
<bean:write name="item"/>
</logic:iterate>

[Sahil Singh]

Hi Marc,
I have done exactly as you have described above,
but it gives the following error:


java.lang.NullPointerException
at java.util.Hashtable.get(Hashtable.java(Compiled Code))
at org.apache.jasper.runtime.PageContextImpl.findAttribute


Could u throw some light..
Thanks In advance,
-Sahil

[Sahil Singh]

Hi Marc ,
I have the answer.
Needed a complete build.
Ur code ran fine....Thanks again..
-Sahil

[Boon Subra]

Hi sahil,

I also have the same task.This is something like.

I fetch the list of values from the database.for each record it has a checkbox column.

Depending on a particular logic, I should check the checkbox . Later the user can check/ uncheck it while submitting.

Can you please be clear with the codes.
Thanks,
Bhuvana

[Sahil Singh]

Hi Bhuvna,

From what i could understand,
u could define a array of string (depending on the no of records returned).
assign/populate them names on the fly using the values from the recordset ,
follow Marc's code from there and then the user is / should be able to check/uncheck the checkboxes..

Hope it made some sense,

i had to just cut/paste Mar'c code(just populating the Array with my own values for the checkboxes).

Questions are welcome,
-Sahil
[ July 09, 2004: Message edited by: Sahil Singh ]

[duc da]

Sorry, but I still got errors. If I keep <logic:iterate name="***" so it said that cannot find the bean name ***, through *** I mapped in struts-config.xml.
Then I use type attribute instead of name, handly map to my actionForm, and I got this error
java.lang.NullPointerException
at java.util.Hashtable.get(Hashtable.java:333)
at org.apache.jasper.runtime.PageContextImpl.findAttribute(PageContextImpl.java:303)
Please tell me the way to handle this. Iam using JBuilder 10 to config the Struts-config

[sudhakar Tadepalli]

You ned to replace "***" with the form name you defined in Struts Config file.

-Sudhakar