import mx.collections.SortField;
import mx.collections.Sort;
import mx.collections.ArrayCollection;
[Bindable]
public var myCollection:ArrayCollection = new ArrayCollection
(
[
{label: "A"},
{label: "B"},
{label: "C"},
{label: "D"},
{label: "E"}
]
);
public function sortCollection():void
{
var sort:Sort = new Sort();
sort.fields = [new SortField("label", true, true)];
myCollection.sort = sort;
myCollection.refresh();
}