flex4.0 datagrid怎么动态添加itemrenderer

给你个例子

<?xml version="1.0"?>

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark"

               xmlns:mx="library://ns.adobe.com/flex/mx">

    <fx:Script><![CDATA[

        import mx.collections.ArrayCollection

        import mx.controls.advancedDataGridClasses.AdvancedDataGridColumn

        private var fields:Array = ['id', 'name']

        private var ac:ArrayCollection = new ArrayCollection([

            {id: 1, name: 'aaaa'},

            {id: 2, name: 'bbbb'},

            {id: 3, name: 'cccc'}

        ])

        private function button1_clickHandler(e:MouseEvent):void {

            var columns:Array = []

            for each (var field:String in fields) {

                var column:AdvancedDataGridColumn = new AdvancedDataGridColumn()

                column.dataField = column.headerText = field

                if(field == 'name') {

                    column.itemRenderer = new ClassFactory(TextInputRenderer)

                }

                columns.push(column)

            }

            adg.dataProvider = ac

            adg.columns = columns

        }

        ]]></fx:Script>

    <fx:Declarations>

        <fx:Component id="myComponent" className="TextInputRenderer">

            <mx:TextInput text="@{data.name}"/>

        </fx:Component>

    </fx:Declarations>

    <mx:AdvancedDataGrid id="adg" width="400" height="300">

    </mx:AdvancedDataGrid>

    <s:controlBarContent>

        <s:Button label="create columns" click="button1_clickHandler(event)"/>

    </s:controlBarContent>

</s:Application>

默认情况下，C1FlexGrid仅有一行多表头，如何来动态的给它添加多表头？ 1.添加行和列：通过FlexGrid.Columns.Add和FlexGrid.Rows.Add方法添加行和列。 2.添加多行表头：通过FlexGrid.ColumnHeaders.Rows.Add方法，在ColumnHeaders区域添加多行的

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