Create the column grouping

          

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    <!-- dpcontrols/adg/ColumnGroupADG.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark">
    <fx:Script> 
         
        import mx.collections.ArrayCollection; 
        // Import the data used by the AdvancedDataGrid control. 
        [Bindable] 
        private var dpFlat:ArrayCollection = new ArrayCollection([ 
            {Region:"Southwest", Territory:"Arizona", Territory_Rep:"Barbara Jennings", Actual:38865, Estimate:40000}, 
            {Region:"Southwest", Territory:"Arizona", Territory_Rep:"Dana Binn", Actual:29885, Estimate:30000}, 
            {Region:"Southwest", Territory:"Central California",Territory_Rep:"Joe Smith", Actual:29134, Estimate:30000}, 
            {Region:"Southwest", Territory:"Nevada", Territory_Rep:"Bethany Pittman", Actual:52888, Estimate:45000}, 
            {Region:"Southwest", Territory:"Northern California",Territory_Rep:"Lauren Ipsum", Actual:38805, Estimate:40000}, 
            {Region:"Southwest", Territory:"Northern California",Territory_Rep:"T.R. Smith", Actual:55498, Estimate:40000}, 
            {Region:"Southwest", Territory:"Southern California",Territory_Rep:"Alice Treu", Actual:44985, Estimate:45000}, 
            {Region:"Southwest", Territory:"Southern California",Territory_Rep:"Jane Grove", Actual:44913, Estimate:45000} 
            ]);
      
    </fx:Script>
    <mx:AdvancedDataGrid id="myADG" dataProvider="{dpFlat}"
        width="100%" height="100%">
        <mx:groupedColumns>
            <mx:AdvancedDataGridColumn dataField="Region" />
            <mx:AdvancedDataGridColumn dataField="Territory" />
            <mx:AdvancedDataGridColumn dataField="Territory_Rep"
                headerText="Territory Rep" />
            <mx:AdvancedDataGridColumnGroup
                headerText="Revenues">
                <mx:AdvancedDataGridColumn dataField="Actual" />
                <mx:AdvancedDataGridColumn dataField="Estimate" />
            </mx:AdvancedDataGridColumnGroup>
        </mx:groupedColumns>
    </mx:AdvancedDataGrid>
</s:Application>

1.	AdvancedDataGridColumn for the GroupLabel field
2.	Add multiple groups to the control
3.	AdvancedDataGridColumn inside Columns
4.	Set default leaf icon to null to hide it
5.	Custom icons for the folder open and closed icons
6.	Use groupedColumns component to group columns together
7.	Multiple column sort when the sortExpertMode property is set to true
8.	Add groups named Area and Revenues
9.	Column Grouping for Hierarchical Data
10.	Regroup GroupCollection

Create the column grouping : AdvancedDataGridColumn « Grid « Flex

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