动态改变DataGird行的颜色
MXML实现如下：

<?xml version="1.0" encoding="utf-8"?><mx:DataGrid xmlns:mx="http://www.adobe.com/2006/mxml">  <mx:Script>    <![CDATA[    import mx.controls.Alert;      override protected function drawRowBackground(s:Sprite, rowIndex:int, y:Number, height:Number, color:uint, dataIndex:int):void      {      if(dataProvider!="" && dataIndex < dataProvider.length){      if(dataProvider[dataIndex].objectid != "0"){      color = 0xFF6600      }      }        super.drawRowBackground(s,rowIndex,y,height,color,dataIndex);      }    ]]>  </mx:Script>  <mx:columns><mx:DataGridColumn headerText="线路ID" dataField="id" textAlign="left"/><mx:DataGridColumn headerText="线路名称" dataField="name" textAlign="left"/>  </mx:columns></mx:DataGrid>

在需要加入的页面：
<comp:DataGrid id="dg" dataProvider="{comboData}" horizontalGridLines="true" width="100%" click="queryLineInfo(event)" height="65%" right="0"/>


as3 CLASS实现如下：

package{import flash.display.Sprite;import mx.collections.ArrayCollection;import mx.controls.DataGrid;public class RowColorDataGrid extends DataGrid{//用于设置颜色，参数: 当前item, rowIndex, dataIndex, 当前colorpublic var rowColorFunction:Function;//覆写drawRowBackground，目的是根据rowColorFunction返回颜色设置当前行override protected function drawRowBackground(s:Sprite, rowIndex:int, y:Number, height:Number,color:uint, dataIndex:int):void{if(rowColorFunction != null){//从dataProvider中获取当前itemvar item:Object;if(dataIndex < dataProvider.length){item = dataProvider[dataIndex];}if(item){ //如果当前item存在，从rowColorFunction中获取行的颜色color = rowColorFunction(item, rowIndex, dataIndex, color);}}//调用父类方法设置当前行颜色super.drawRowBackground(s, rowIndex, y, height, color, dataIndex);}}}}