1. <?xml version="1.0" encoding="utf-8"?> 
2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" minWidth="955" minHeight="600"> 
3.     <mx:Script> 
4.         <![CDATA[ 
5.             import mx.collections.ArrayCollection; 
6.             import mx.collections.IList; 
7.             [Bindable] 
8.             private var arrayCollection:ArrayCollection=new ArrayCollection([ 
9.                 {id:"1",name:"小1"}, 
10.                 {id:"2",name:"小2"}, 
11.                 {id:"3",name:"小3"} 
12.             ]); 
13.              
14.             public function moveUp():void{                    
15.                 var i : int = dataGrid1.selectedIndex;   
16.                 if (i >= 1&&dataGrid1.selectedItem){                
17.                     IList(dataGrid1.dataProvider).addItemAt(dataGrid1.selectedItem,i-1);                     
18.                     IList(dataGrid1.dataProvider).removeItemAt(i+1);   
19.                     dataGrid1.selectedIndex = i;   
20.                      
21.                 }   
22.             }   
23.              
24.             public function moveDown():void{   
25.                 var i : int = dataGrid1.selectedIndex;         
26.                 if (i < (ArrayCollection(dataGrid1.dataProvider).length - 1) && dataGrid1.selectedItem){                
27.                     IList(dataGrid1.dataProvider).addItemAt(dataGrid1.selectedItem,i + 2);                     
28.                     IList(dataGrid1.dataProvider).removeItemAt(i);      
29.                     dataGrid1.selectedIndex = i; 
30.                 }               
31.             }  
32.              
33.             private function addColumnItem():void{
     
34.                 arrayCollection.addItem({id:"id",name:"name"}); 
35.                 dataGrid1.selectedIndex=arrayCollection.length; 
36.             } 
37.              
38.             private function delColunmItem(colunmItem:Object):void{
     
39.                 arrayCollection.removeItemAt(arrayCollection.getItemIndex(colunmItem)); 
40.                 dataGrid1.selectedIndex=arrayCollection.length-1; 
41.             } 
42.         ]]> 
43.     </mx:Script> 
44.     <mx:Panel width="500" height="300" title="DataGrid简单测试"> 
45.         <mx:HBox width="100%" height="100%"> 
46.             <mx:DataGrid width="100%" height="100%" id="dataGrid1" dataProvider="{arrayCollection}"> 
47.                 <mx:columns> 
48.                     <mx:DataGridColumn dataField="id" headerText="ID"/> 
49.                     <mx:DataGridColumn dataField="name" headerText="姓名"/> 
50.                 </mx:columns> 
51.             </mx:DataGrid> 
52.             <mx:VBox width="60"> 
53.                 <mx:Spacer height="100%"/> 
54.                 <mx:Button label="上移" id="up" click="moveUp()" enabled="{dataGrid1.selectedItem?true:false}"/> 
55.                 <mx:Spacer height="5"/> 
56.                 <mx:Button label="下移" id="down" click="moveDown()" enabled="{dataGrid1.selectedItem?true:false}"/> 
57.                 <mx:Spacer height="5"/> 
58.                 <mx:Button label="╂" click="addColumnItem()"/> 
59.                 <mx:Spacer height="5"/> 
60.                 <mx:Button label="━" enabled="{dataGrid1.selectedItem?true:false}" click="delColunmItem(dataGrid1.selectedItem)"/> 
61.                 <mx:Spacer height="100%"/> 
62.             </mx:VBox> 
63.         </mx:HBox> 
64.     </mx:Panel> 
65. </mx:Application> 

移动的代码参考地址：