How to create a dynamic flexible datagrid

I am trying to create a dynamic datagrid in Flex. The data will return fine and I can add the column headers. I need to do it like this since the column names are dynamic and come from the mysql database.

Can anyone help me get values ​​from re.result.resultSet.results [j] .notes in data fields?

   <mx:Script>
     <![CDATA[

           import mx.rpc.events.FaultEvent;
           import mx.rpc.events.ResultEvent;
             import mx.controls.Alert;
             import mx.controls.dataGridClasses.DataGridColumn; 


            public function faultHandler(event:FaultEvent ):void {
                // The following statements must be inside a function. 

                text.text = event.message.toString();
            }
            public function resultHandler(re:ResultEvent):void {
                // The following statements must be inside a function. 

                text.text = "blah";
                text.text += re.result.resultSet.columnList[0].key.toString();


                for (var i:int = 0; i< re.result.resultSet.columnList.length; i++) {
                    text.text += re.result.resultSet.columnList[i].key.toString();

                }
                var cols:Array = new Array();
                var dataProv:Array = new Array();
                for (var j:int = 0; j< re.result.resultSet.columnList.length; j++) {
                    text.text += re.result.resultSet.results[j].notes.toString();
                    var column:DataGridColumn = new DataGridColumn;
                    column.headerText= re.result.resultSet.results[j].label.toString();
                    column.dataField = re.result.resultSet.results[j].notes.toString();
                    cols.push(column);


            }
            myGrid.columns = cols;


            }



    ]]></mx:Script>
     <mx:TextArea id="text" x="74" y="47" width="551" height="350"/>
     <mx:Button x="647" y="46" label="Button" click ="{myservice.getWorkSheets()}"/>
    <mx:DataGrid id="myGrid" x="74" y="424" width="551"/>

</mx:Application>

      

        
        
        
      

    

thank,