ArrayCollection排序的例证

ArrayCollection排序的例子

var ac:ArrayCollection = new ArrayCollection();

//先加入几条测试数据
ac.addItem(
???? {ID:0,userName:AAA},
???? {ID:1,userName:CCC},
???? {ID:2,userName:BBB}
);

//定义Sort对象
var sort:Sort = new Sort();

//默认是按照升序排序的
sort.fields = [new SortField("userName")];

//如果按照降序排序，需要修改一下
//sort.fields = [new SortField("userName",true,true)];

//如果先降序（ID）后升序（userName），就这样写，以此类推
//sort.fields = [new SortField("userID",true,true),new SortField("userName")];

//把sort对象指定给ac
ac.sort = sort;

//执行刷新操作，否则不变
ac.refresh();

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2、另外一个

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" verticalAlign="middle" backgroundColor="white" creationComplete="init()">       <mx:Script>         <![CDATA[             import mx.collections.SortField;             import mx.collections.Sort;             import mx.collections.ArrayCollection;               [Bindable]             private var arrColl:ArrayCollection;               /** This method gets called by the main mx:Application tag and initializes/populates the ArrayCollection object with a bunch of random numbers. */             private function init():void {                 var i:int;                   /* Initialize and populate the ArrayCollection object. */                 arrColl = new ArrayCollection();                 for (i = 0; i < 20; i++) {                     arrColl.addItem({data:getRandomNumber().toFixed(4)});                 }             }               /** This method returns a random floating-point number between 0 and 10000. */             private function getRandomNumber():Number {                 return Math.random() * 10000;             }               /** This method gets called by the Button control's click handler and creates a new SortField and Sort object which are used to sort the ArrayCollection. */             private function button_click():void {                 /* Create the SortField object for the "data" field in the ArrayCollection object, and make sure we do a numeric sort. */                 var dataSortField:SortField = new SortField();                 dataSortField.name = "data";                 dataSortField.numeric = true;                   /* Create the Sort object and add the SortField object created earlier to the array of fields to sort on. */                 var numericDataSort:Sort = new Sort();                 numericDataSort.fields = [dataSortField];                   /* Set the ArrayCollection object's sort property to our custom sort, and refresh the ArrayCollection. */                 arrColl.sort = numericDataSort;                 arrColl.refresh();             }         ]]>     </mx:Script>       <mx:List id="list" dataProvider="{arrColl}" textAlign="right" labelField="data" width="100" />       <mx:Button id="button" label="sort items" click="button_click()" />   </mx:Application>

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