package org.lxh  {         import flash.display.Sprite;      import mx.controls.DataGrid;      public class SpecialDataGrid extends DataGrid      {          private var _rowColorFunction:Function;   //用于在外部能通过指定一个方法 去实现改变列的背景色          public function SpecialDataGrid()          {              super();          }          public function set rowColorFunction(f:Function):void          {              this._rowColorFunction = f;          }          public function get rowColorFunction():Function          {              return this._rowColorFunction;          }          //复写该方法          override protected function drawRowBackground(s:Sprite,rowIndex:int,y:Number, height:Number, color:uint, dataIndex:int):void          {              if( this.rowColorFunction != null ){                  if( dataIndex < this.dataProvider.length ){                      var item:Object = this.dataProvider.getItemAt(dataIndex);                      color = this.rowColorFunction.call(this, item, color);                  }              }                         super.drawRowBackground(s, rowIndex, y, height, color, dataIndex);          }      }  }

<control:SpecialDataGrid id="planDataGrid" width="100%"  height="100%"  alternatingItemColors="[0xe3eaf2,0xe8f1f8]" dataProvider="{strArray}" rowColorFunction="colorFunction" doubleClick="planDataGrid_doubleClickHandler(event)" doubleClickEnabled="true">                          <control:columns>                              <mx:DataGridColumn dataField="选择" width="50" sortable="false" resizable="false"  showDataTips="true">                                  <mx:itemRenderer>                                      <fx:Component>                                          <mx:CheckBox change="outerDocument.checkChangeHandlerForPlan(event)"/>                                      </fx:Component>                                  </mx:itemRenderer>                              </mx:DataGridColumn>                          <mx:DataGridColumn dataField="id" headerText="主键" visible="false"/>                          </control:columns>                      </control:SpecialDataGrid>

    private function colorFunction(item:Object, color:uint):uint      {                      var col:uint=0xe3eaf2;                      if(commonMsg.length > 0){                          for(var i:int=0;i<commonMsg.length;i++){                              if(commonMsg.getItemAt(i).id==item.id){                                  col=0xF10026;                              }                          }                      }                      return col;      }