Flex分页（适用于小型数据）

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="300" xmlns:local="*">

    <mx:Script>
       <![CDATA[
           /*
            因为是一次取出全部数据，所以适合数据量不会太大的情况。
            加了一个pageSize,用来控制每页显示的行数，可以在调用这个组件的时候为pageSize属性赋值，
            默认为每页显示10行数据,不需要为DataGrid指定高度。
           */

           import mx.collections.ArrayCollection;      
           [Bindable]public var pageSize:int=10;//每页显示行数
           [Bindable]private var totalPage:int=0;//总页数
           [Bindable]private var currentPage:int=0;//当前页          

           [Bindable]
           public var acAllData:ArrayCollection;//所有数据

           [Bindable]
           private var acPageData:ArrayCollection=new ArrayCollection();//当前页数据

           [Bindable]
           public var arrColumns:Array;//DataGrid列,在调用时需要为这个数组设置数据

          

           //初始化

           public function init(value:ArrayCollection):void{
              acAllData=value;
              if(acAllData.length!=0 && acAllData!=null){
                  totalPage=Math.ceil(acAllData.length/pageSize);
                  loadData(0);
              }else{
                  currentPage=0;
                  totalPage=0;
              }
           }

          

           //加载数据

           private function loadData(pageNum:int):void {
              if(pageNum>=0 && pageNum<totalPage){
                  acPageData.removeAll();
                  currentPage=pageNum;//重新为当前页的变量赋值
                  var startIndex:int=pageNum*pageSize;//计算起始索引
                  for(var i:int=0;i<pageSize && startIndex<acAllData.length;i++){
                     acPageData.addItem(acAllData[startIndex]);
                     startIndex++;
                  }
              }
           }

       ]]>

    </mx:Script>

    <mx:VBox x="0" y="0" width="100%" height="100%" verticalGap="0" horizontalAlign="center" backgroundColor="white">
       <mx:DataGrid id="customgrid" width="100%" dataProvider="{acPageData}" columns="{arrColumns}" rowCount="{pageSize}"/>
      
       <mx:HBox cornerRadius="12" borderStyle="solid" horizontalAlign="center" verticalAlign="middle">
           <mx:Text text="{' 第'+(totalPage>0?(currentPage+1):0)+'页/共'+totalPage+'页'+' 共'+(acAllData!=null?acAllData.length:0)+'条记录'}" fontSize="12"/>

           <mx:LinkButton id="lbtnFirst" label="首页" click="loadData(0)" enabled="{lbtnPrevious.enabled}" fontSize="12"/>
           <mx:LinkButton id="lbtnPrevious" label="上一页" click="loadData(currentPage-1)" enabled="{currentPage!=0?true:false}" fontSize="12"/>
           <mx:LinkButton id="lbtnNext" label="下一页" click="loadData(currentPage+1)" enabled="{totalPage>(currentPage+1)?true:false}" fontSize="12"/>
           <mx:LinkButton id="lbtnLast" label="尾页" click="loadData(totalPage-1)" enabled="{lbtnNext.enabled}" fontSize="12"/>
           <mx:NumericStepper id="nsPageNum" stepSize="1" minimum="1" maximum="{totalPage}" enabled="{lbtnJump.enabled}"/>
           <mx:LinkButton id="lbtnJump" label="跳转" click="loadData(nsPageNum.value-1)" enabled="{totalPage>1?true:false}" fontSize="12"/>

       </mx:HBox>
    </mx:VBox>

</mx:Canvas>

调用test.xml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:local="*"     creationComplete="creationComplete()">
     <mx:Script>
        <![CDATA[
           import mx.collections.ArrayCollection;
           [Bindable]
           private var ac:ArrayCollection;
           private function creationComplete():void{
               loadAcData();
           }
       
           //如果查询出来的数据为xml格式，调用这个方法

           private function loadXmlData(xml:XML):void{
              ac=new ArrayCollection();
              for each(var item:Object in xml.Table){ //将Table换成XML中的根元素名称
                  ac.addItem(item);
              }
              dg.init(ac);
           }
    

           //查询出来的结果为数组，直接传递给init即可
           private function loadAcData():void{
               ac=new ArrayCollection();
               //测试数据
               for(var i:int=0;i<35;i++){
                  var obj:Object=new Object();
                  obj.photo_id=i.toString();
                  obj.photo_name="photo"+i;
                  ac.addItem(obj);
               }
               dg.init(ac);
           }
        ]]>
     </mx:Script>

     <!--设置pageSize为8,表示每页显示8条记录，不设置默认显示10条记录-->

    <local:kelvin_DataGrid id="dg" width="495" height="300" pageSize="8" x="124" y="24">
       <local:arrColumns><!--为这个标签设置DataGridColumn，指示在DataGrid上显示的列-->
           <mx:DataGridColumn headerText="id" dataField="photo_id"/>
           <mx:DataGridColumn headerText="name" dataField="photo_name"/>
       </local:arrColumns>
    </local:kelvin_DataGrid>

</mx:Application>