I am getting this error when i am using for loop for two maps i.e ChildIdMap, PickSumMAp.

GETTING ERROR IN THIS PART OF CODE

===================================================Part of Code============

for(Id parentId:ChildIdMap.keyset())
{

for(Id ChildId : PickSumMap.keyset()){

if((ChildIdMap.get(parentId))==ChildId)
{

Decimal d=PickSumMap.get(ChildId);
}

}
}

============================================ 

===========================Full Controller Class===========================

global static CaseBean[] SuccessRate(){

Decimal CountPick;
Map<Id,CaseBean> caseBeanMap=new Map<Id,CaseBean>();
Map<Id,Integer> countMap=new Map<Id,Integer>();
Map<Id,Map<Id,Decimal>> servCollMap=new Map<ID,Map<Id,Decimal>>();
Map<Id,Id> ChildIdMap=new Map<Id,Id>();
Map<Id,Decimal> PickSumMap=new Map<Id,Decimal>();
Map<Id,Account> parentAccountMap=new Map<Id,Account>([SELECT Id,Name from Account where ParentId=null]);
List<Case> caseList=[SELECT Id,CaseNumber, Reason, Status,c.Account.Grand_Parent_Account__c,CreatedDate,ClosedDate
FROM Case c where reason in ('Bags not delivered','Bin not delivered' ,'Bin not removed','Complaint from customer',
'Complaint from the Council','Customer wants to cancel','Delayed Collection','Missed Collection','Missing Bin')
AND c.account.id !=null AND CaseNumber!=null AND ClosedDate = THIS_YEAR];
List<Service__c> servList=[Select id,Count_of_Pickup_Days__c,s.Customer__r.Name,s.Customer__r.Parent.id, s.Customer__r.Grand_Parent_Account__c,
Status__c,s.Customer__r.Active_Account_Services__c from Service__c s
where s.Customer__r.id!=null AND Count_of_Pickup_Days__c!=null
AND Status__c = 'Active'];

for(Case caseObj:caseList){
ID parentAccountId=caseObj.Account.Grand_Parent_Account__c;
if(countMap.get(parentAccountId)==null)
{
countMap.put(parentAccountId,1);
}
else
{
integer cnt=countMap.get(parentAccountId);
countMap.put(parentAccountId,cnt+1);
}
}
for(Service__c serObj: servList){
ID AccntId=serObj.Customer__r.id;
ID parentAccntId=serObj.Customer__r.Grand_Parent_Account__c;
if(serObj.Status__c == 'Active'){
if(PickSumMap.get(AccntId)==null)
{

PickSumMap.put(AccntId,serObj.Count_of_Pickup_Days__c);




}
else
{
PickSumMap.put(AccntId,serObj.Count_of_Pickup_Days__c);



}
if(ChildIdMap.get(AccntId)==null)
{
ChildIdMap.put(parentAccntId,AccntId);

}
else
{
ChildIdMap.put(parentAccntId,AccntId);

}
}

}

for(Id parentId:ChildIdMap.keyset())
{

for(Id ChildId : PickSumMap.keyset()){

if((ChildIdMap.get(parentId))==ChildId)
{

Decimal d=PickSumMap.get(ChildId);
}

}
}
CaseBean[] beanList=new CaseBean[100000];

}
//System.Debug('---BeanList---'+beanList);
return beanList;
}

i just want to show it according to parentId having Child records and want count of those child records

Need It Urgently

Hi Friends,

here is my problem

"I want to display Excel data in visualforce page".

could any one please explain me that how to do this?

Thanks,

Amit Singh