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Vigneshwaran Loganathan
Error : Attempt to de-reference a null object
Hi,
I am trying to get all the selected records from data table using Onchange function, but got the error, where am i making mistake?
VF:
Controller :
Thanks in advance.
I am trying to get all the selected records from data table using Onchange function, but got the error, where am i making mistake?
VF:
<apex:dataTable value="{!wrapPriceList}" var="pdWrap" columnswidth="50px,50px" cellpadding="4" border="1" align="center" id="reRenderPbId"> <apex:column > <apex:facet name="header"> <apex:inputCheckbox > <apex:actionSupport event="onclick" action="{!getselected1}" onsubmit="selectAllCheckboxes(this,'inputId')" rerender="inputId"/> </apex:inputCheckbox> </apex:facet> <apex:inputCheckbox value="{!pdWrap.selected}" id="inputId"> <apex:actionSupport event="onclick" action="{!GetSelected1}" rerender="false"/> </apex:inputCheckbox> </apex:column> <apex:column headerValue="Operating Model"><apex:outputtext value="{!pdWrap.pds.Name}" /></apex:column> </apex:dataTable>
Controller :
public class QuoteController{ public List<Price_details__c> prc; public List<Price_details__c> selectedprd=new List<Price_details__c>(); public list<price_details__c> getselected1; public Boolean rendcart{get;set;} public price_details__c price{get;set;} public Price_details__c SearchCriteria{get;set;} public List<wrapPrice> wrapPriceList{get;set;} public List<Price_details__c> wrapPriceList2{get;set;} public opportunity opp{get;set;} public String cid = ApexPages.currentPage().getParameters().get('id'); public QuoteController(ApexPages.StandardController controller) { SearchCriteria = new Price_details__c(); prc= new list<Price_details__c>(); region = false; typef = false; } public void filterapp() { godis=true; wrapPriceList = new List<wrapPrice>(); if(SearchCriteria.Operating_Model__c!=null && Quantity!=null && SearchCriteria.Region__c!=null && typeSelected==null) { for(Price_Details__c pd: [SELECT Id,Operating_Model__c,Buying_Price__c,Type__c,MSRP__c, Name FROM Price_details__c WHERE Operating_Model__c =: SearchCriteria.Operating_Model__c and QuantityStart__c<=:Quantity and QuantityEnd__c>=:Quantity and region__c=:SearchCriteria.region__c ]) { wrapPriceList.add(new wrapPrice(pd)); } } } system.debug('>>>wrapPriceList'+wrapPriceList); } public pagereference getSelected1() { system.debug('>>>wraps'+wrapPriceList); // here i got all records for(wrapPrice wrapx:wrapPriceList) if(wrapx !=null && wrapx.selected==true ) { system.debug('>>>wraps'+wrapx); // here i got the purticular selected record wrapPriceList2.add(wrapx.pds); // Error at this line } return null; } public class wrapPrice { public Price_Details__c pds {get; set;} public Boolean selected {get; set;} public wrapPrice(Price_Details__c pd) { pds = pd; selected = false; } } }
Thanks in advance.
you are getting this error because you have missed initialization of this list, add following line in your constructor after line 14
List<Price_details__c> wrapPriceList2 = new List<Price_details__c>();
Thanks,
Himanshu
All Answers
you are getting this error because you have missed initialization of this list, add following line in your constructor after line 14
List<Price_details__c> wrapPriceList2 = new List<Price_details__c>();
Thanks,
Himanshu