[flexcoders] How to create summary in GroupingCollection -- AS3

[vkc_nair]

Hi All, 

I have a function to create the grouping (two levels), which is the 
data provider for Advanceddatagrid. I want to add summary at the 
group 
node. How to do that? 
eg 
Node1(20) 
Node1.1(5) 
Node1.2(15) 
Node2(10) 
Node2.1(8) 
Node2.2(2) 


This is my function. 


public function resultGroupByLane():void{ 


var mygroup:GroupingCollection=new 
GroupingCollection(); 
mygroup.source = model.gatetransaction; 


var group:Grouping = new Grouping(); 
var gf:GroupingField = new GroupingField("laneid"); 
var gf1:GroupingField = new GroupingField("wtaskid"); 


group.fields=[gf,gf1]; 


mygroup.grouping = group; 


mygroup.refresh(); 
dggroup.dataProvider = mygroup; 
} 


Thanks 
VN