Implementing clear button in struts

[Sunitha Mudidani]

Hi all,
I have a jsp where some of the fields like "submitted date" have default values populated in the jsp. When the user clicks on the CLEAR button all the fields shd be cleared and the default fields shd be populated with teh default values.

I understand this can be implemented using a javascript function. But a session variable also has to be removed from the session scope on clicking this CLEAR button. Pls let me know how this can be implemented.

[Merrill Higginson]

One possible solution would be to use the <html:cancel> button. This button performs a submit, but does not call validation.

Once the form has been submitted, in your Action class you would call the superclass' isCancelled() method to determine whether the cancel button was pressed or not. If it was, you can do whatever you need to do to make the page appear as you want it to appear and to remove the session attribute.

If you're using Struts 1.2.9 or above, you will also have to add cancellable="true" to your action mapping.
[ March 05, 2007: Message edited by: Merrill Higginson ]

[Sunitha Mudidani]

Thanks for your reply.

But iam stuck in using the <html:cancel> button.
Iam using jdeveloper studioo version 10.1.3
Iam not sure which version of struts it is using.

When iam clicking on the CANCEL button no effect is taking place.
These are the changes that i have done.

1) In the JSP

   ..
 <html:cancel value="CLEAR"  /> 
..
 

2)In the struts-config.xml, added the below line in <action..> tag

 
  <set-property property="cancellable" value="true"  />

3) In the Action class, the corresponding code is,

     execute(...){
       ....
        if(isCancelled(request)){
            Sop("**** in isCancelled ****")
            session.setAttribute("customerSearchResults", null);
            return mapping.findForward( "search");
        }

Also Iam getting an exception :

 
007-03-06 15:51:56,435 ERROR [org.apache.struts.action.ActionServlet] - Parsing error processing resource path 
java.lang.NoSuchMethodException: Bean has no property named cancellable
at org.apache.commons.digester.Digester.createSAXException(Digester.java:2540)
at org.apache.commons.digester.Digester.createSAXException(Digester.java:2566)
at org.apache.commons.digester.Digester.startElement(Digester.java:1276)
at oracle.xml.parser.v2.NonValidatingParser.parseElement(NonValidatingParser.java:1288)
at oracle.xml.parser.v2.ValidatingParser.parseRootElement(ValidatingParser.java:1
......
 
   

Pls let me know how to proceed

Thanks,
Sunitha

[Sunitha Mudidani]

The struts version being used in JdeveloperStudioVersion 10.1.3 is struts 1.1 So I removed the cancellable property and the exception is gone.

But the clear button implementation is not getting invoked.

Waiting for suggestions...

[Merrill Higginson]

Did you specify a property attribute in your <html:cancel> tag? If so, remove it. This will cause the isCancelled() method not to work.

[Sunitha Mudidani]

No.. I didnot use property attribute in <html:cancel>

[Merrill Higginson]

Please be more clear about what is happening. Is the execute of the action class being called when the cancel button is pressed? if so, is the value returned by isCancelled(request) false?