过滤筛选DataGrid里的数据
<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="http_test.send()" ><mx:Script><![CDATA[import mx.collections.ArrayCollection;[Bindable]var datas:ArrayCollection;private function onResult():void{this.datas=http_test.lastResult.blog.channel.item;}private function applyFilter():void{if(this.datas.filterFunction==null){this.datas.filterFunction=this.filterCities;}this.datas.refresh();}private function filterCities(item:Object):Boolean{var match:Boolean=true;if(cityFilter.text!=""){var city:String=item["city"];var filter:String=cityFilter.text;//转成小写字母搜索字符串（输入的信息转成小字后）//也就是把它们全部都转换成小写再进行搜索//city.indexOf(filter)如果没有找就就返回一个-1if(!city || city.toLowerCase().indexOf(filter.toLowerCase())<0){match=false;}}return match;}]]></mx:Script><mx:HTTPService id="http_test" url="/flex_xml/date.xml" useProxy="false"resultFormat="object"result="onResult();"></mx:HTTPService><mx:Panel title="{http_test.lastResult.blog.channel.title}" width="90%" height="90%" verticalAlign="middle" horizontalAlign="center"><mx:Form><mx:FormItem label="City"><mx:TextInput id="cityFilter" change="applyFilter();"/></mx:FormItem></mx:Form><mx:DataGrid id="http_dataGird" dataProvider="{datas}" width="100%" height="50%"><mx:columns><mx:DataGridColumn headerText="标题" dataField="title"/><mx:DataGridColumn headerText="作者" dataField="author"/><mx:DataGridColumn headerText="类型" dataField="category"/><mx:DataGridColumn headerText="连接" dataField="link"/><mx:DataGridColumn headerText="城市" dataField="city"/></mx:columns></mx:DataGrid></mx:Panel></mx:Application>?DataGrid里面的数据是取于XML如果不知道怎么解析XML数据，可以看博客《Flex里解析XML数据》里面有完整的工程，可下载