How to call a method from an action class using Struts 2.

[Vic Hood]

Hi All,
I have a situation where I have to call an action class , when there is a change in the values of a dropdown box that im implementing using struts 2 tags , im trying to use javascript for this and need to pass a variable to the function being called > Could anyone please help me with an example .Thanks.

[Raza Mohd]

There are various option you can use for Ajax Calling .
like dwr ,Json ,jQuery..

but there is one more option to call action without using it.

Call a Javascript method on change event of dropdown and submit your form there.


Best Regards
Mohd Raza

[Vic Hood]

I intend to use Javascript , could you please provide an example. Thanks

[Vic Hood]

Bounce! Any help would be appreciated.

[Nick Sher]

Vic Hood wrote:Hi All,
I have a situation where I have to call an action class , when there is a change in the values of a dropdown box that im implementing using struts 2 tags , im trying to use javascript for this and need to pass a variable to the function being called > Could anyone please help me with an example .Thanks.

Try this,

<s:select name="actionProperty" list="listOfValues" value="%{#prop.value.value}"  														onchange="javascript:submitForm('formId','action_methodName.action?param1=value')"/>

In your javascript method you will have

function submitForm(formId, baseAction)
{
    form = eval("document." + formId);
    if(baseAction)
    	form.action = baseAction;
    form.target = "_self";    
    form.submit();  
}

[Vic Hood]

Im sorry, but i couldnt understand your example.Could you please explain it further?

[Robin John]

post your code Vic .. it will help us help u....

[Vic Hood]

Robin John wrote:post your code Vic .. it will help us help u....

Thanks for replying Robin. Well Im hoping to load a list on the basis of a parameter passed through the dropdown. The code for the dropdown and the javascript that i have currently written but does not work is as follows

	<script language="JavaScript">
    function function1(a) {
    	
		alert(a.options[a.selectedIndex].value);
			//return;
    	document.frmDomain.action="listDomain.action(a.options[a.selectedIndex].value)";
       	document.frmDomain.submit() ;       	
        	
    } 
</script>
 <s:select 
        headerKey="-1" headerValue="--Select--"
        list="dtList" 
        listValue="description"
        listKey="objid"
        name="domainBean.domainTypeOid" onchange="function1(this)"
         />

How do i go about writing the Javascript function to acheive what I need? Thanks

[Robin John]

Hey Vic, sorry for the late reply, was stuck on something else..... look at the below code.. it should work... (I have not tested it.. please test it)

<script language="JavaScript">   
    function func(a) {   
		var b = a.options[a.selectedIndex].value;
		var sub = document.myForm.action + '?bar=' + b;  // use whatever url you want to. 
		alert(sub);
                                document.myForm.submit();              
               
    }    
</script>
<s:form name="myForm" action="yourAction.action" method="post">
<s:select label="label" name="name" list="#{'foo':'foovalue', 'bar':'barvalue'}" onchange="func(this);"/> // use your own list.
</s:form>

you can use "actionName!methodName.action" in the URL to go to "methodName" method.

[poornimaa ananth]

Hi,

I Am working on struts 2 to be deployed on IBM portal server. Need to use ajax. when a textfield is populated an action has to be invoked. based on the result a dropdown has to be enabled or disabled. I have tried the other samples provided in the thread but with no result. Need help asap. Thanks in advance.