Item renderer issue

Question

Hi,
I have a comboBox as item renderer in my datagrid (comboBox item renderer code bellow).
1. How can I remove the first blank item? My comboBox arrayCollection doesn't have 0 item.
2. If I come back to the cell that it was already selected with a value from my comboBox, how can I set the selected item of my comboBox to be the same as the previus value? If I leave the comboBox without selection it will be blank as the 0 element.
Please help.
Thanks
Johnny
<?xml version="1.0" encoding="utf-8"?>
<mx:ComboBox xmlns:mx="http://www.adobe.com/2006/mxml"
             labelField="label" dataProvider="{acCombo}" rowCount="20"
             change="onSelectionChange(event)" creationComplete="init()">
    <mx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            import mx.controls.dataGridClasses.DataGridListData;
            import mx.events.ListEvent;
            import mx.rpc.events.ResultEvent;
            [Bindable]private var acCombo:ArrayCollection = new ArrayCollection ([{id:1, label:"Item 01"},{id:2, label:"Item 02"},{id:3, label:"Item 03"},
                {id:4, label:"Item 04"},{id:5, label:"Item 05"}]);
            private var _ownerData:Object;
            public function init():void
                //init code
            override public function set data(value:Object):void
                if (value){
                    _ownerData = value as Object;
                    var col:DataGridListData = DataGridListData(listData);
                    var item:Object = new Object;
                    var clabel:String = value[col.dataField];
                    var cid:int = value.id;
                    item.label = clabel;
                    item.id = cid;
                    selectedItem = item;
            override public function get data():Object
                return _ownerData;
            override public function setFocus():void
                super.setFocus();
                open();
            private function onSelectionChange(e:ListEvent):void
                if(selectedItem && _ownerData){
                    var col:DataGridListData = DataGridListData(listData);
                    var clabel:String = selectedItem.label;
                    var cid:int = selectedItem.id;
                    _ownerData[col.dataField] = clabel;
                    _ownerData[id] = cid;
        ]]>
    </mx:Script>
</mx:ComboBox>

Answer 1

Hi,
I created a sample, maybe someone can see the issue for me
Thanks!
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" viewSourceURL="srcview/index.html"
                creationComplete="init()">
    <mx:Script>
        <![CDATA[
            import mx.events.CollectionEvent;
            import mx.events.DataGridEvent;
            import com.myItemEditor;
            import mx.collections.ArrayCollection;
            [Bindable] private var acExecution:ArrayCollection = new ArrayCollection([
                {Territory:"Arizona", Territory_Rep:"Barbara Jennings", ITEM_ID:1, ITEM_NAME:"Item 01"},
                {Territory:"Central California", Territory_Rep:"Joe Smith", ITEM_ID:2, ITEM_NAME:"Item 02"},
                {Territory:"Nevada", Territory_Rep:"Bethany Pittman", ITEM_ID:2, ITEM_NAME:"Item 02"}, 
                {Territory:"Northern California", Territory_Rep:"T.R. Smith", ITEM_ID:1, ITEM_NAME:"Item 01"},
                {Territory:"Southern California", Territory_Rep:"Jane Grove", ITEM_ID:3, ITEM_NAME:"Item 03"}
            private function init():void
            private function onItemEditEnd(e:DataGridEvent):void
                var cEditor:myItemEditor = dgCustomEditor.itemEditorInstance as myItemEditor;
                var item:Object = cEditor.selectedItem;
                acExecution.refresh();
        ]]>
    </mx:Script>
    <mx:DataGrid id="dgCustomEditor" dataProvider="{acExecution}" height="160"
                 editable="true" itemEditEnd="onItemEditEnd(event)">
        <mx:columns>
            <mx:DataGridColumn headerText="Territory" dataField="Territory" width="60"
                               editable="false"/>
            <mx:DataGridColumn headerText="Territory Rep" dataField="Territory_Rep" width="60"
                               editable="false"/>
            <mx:DataGridColumn headerText="Item ID" dataField="ITEM_ID" width="60"
                               editable="false"/>
            <mx:DataGridColumn headerText="Item Name" dataField="ITEM_NAME" width="160" itemEditor="com.myItemEditor" />
        </mx:columns>
    </mx:DataGrid>
</mx:Application>
Item Editor component
<?xml version="1.0" encoding="utf-8"?>
<mx:ComboBox xmlns:mx="http://www.adobe.com/2006/mxml"
             labelField="LABEL" dataProvider="{acCombo}" rowCount="20"
             change="onSelectionChange(event)" creationComplete="init()">
    <mx:Script>
        <![CDATA[
            import mx.events.ListEvent;
            import mx.controls.dataGridClasses.DataGridListData;
            import mx.rpc.events.ResultEvent;
            import mx.collections.ArrayCollection;
            [Bindable]private var acCombo:ArrayCollection = new ArrayCollection ([{ID:1, LABEL:"Item 01"},{ID:2, LABEL:"Item 02"},{ID:3, LABEL:"Item 03"},
                {ID:4, LABEL:"Item 04"},{ID:5, LABEL:"Item 05"}]);
            private var _ownerData:Object;
            private function init():void
                //init code
            override public function set data(value:Object):void
                if (value){
                    _ownerData = value as Object;
                    var col:DataGridListData = DataGridListData(listData);
                    var item:Object = new Object;
                    var clabel:String = value[col.dataField];
                    var cid:int = value["ITEM_ID"];
                    item.LABEL = clabel;
                    item.ID = cid;
                    selectedItem = item;
            override public function get data():Object
                return _ownerData;
            override public function setFocus():void
                super.setFocus();
                open();
            private function onSelectionChange(e:ListEvent):void
                if(selectedItem && _ownerData){
                    var col:DataGridListData = DataGridListData(listData);
                    var clabel:String = selectedItem.LABEL;
                    var cid:int = selectedItem.ID;
                    _ownerData[col.dataField] = clabel;
                    _ownerData["ITEM_ID"] = cid;
        ]]>
    </mx:Script>
</mx:ComboBox>