How to implement onchange on dropdownlist ?

vsoman1984

Hi All,

I need to refresh my JSP on the selection of option from the dropdown box.I need to perform this action without the any click on link or button.So i have gone through the WDK doc and found that onchange is the option for that while using <dmf:dropdownlist>

So i have the following lne in my JSP. <dmf:dropdownlist name='<%=FreewayDashboard.PRJTSTATUS_DROPDOWN_CONTROL_NAME%>' value='11' onchange='onSetMaxResults' tooltipnlsid='MSG_SRCLANG_LABEL_TT'> <dmf:option value='1' nlsid='MSG_DRAFT'/>

<dmf:option value='2' nlsid='MSG_IN_PRODUCTION'/>

...

<dmf:option />

</dmf:dropdownlist>

and the following method in the Java file:

public void onSetMaxResults(DropDownList list) {
   int projectStatus;
  try {
   list = (DropDownList) getControl("__PRJTSTATUS_DROPDOWN_CONTROL_NAME");
     projectStatus = Integer.parseInt(list.getValue());  
   System.out.println("This is selectedPrjtStatus ## inside testForWsSuccess()" + projectStatus);
   switch (projectStatus){
   case 1 :  ptSummary = (obtain from webservice call) ;break;
   case 1 :  ptSummary = (obtain from webservice call) ;break;
            default: System.out.println("Invalid value.");break;
   }
     // use the 'ptSummary' value obtained
  } 
  catch (Exception ex) {
   // TODO handle custom exceptions here
   ex.printStackTrace();
  }  
 }

But i am unable to trigger the onchange event.The function never gets called.

Could you please help me where i am going wrong.

Thanks & Regards

Vishnu S

dnvhariprasad

onchange event will not be handled immediately.  It will be handled when the was submitted.

If you wish to fire the event immediately, use onselect event of dropdownlist