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博悦娱乐手机登录地址: Flex与后台交互的几种方法详解

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拥抱趣味向创造力致敬八国十二校国际大学生机器人设计大赛在浙大落幕■本报通讯员周炜施敏辉周楠没有一台相同的机器人执行主席之一、控制学院副教授王酉认为,赛题有点难,但没有一台机器人会是相同的。她的上位是培养人,下位是让每一个学生的思维在课堂上发生。

1.FlashVars(单向传递)

A.传递:在<embed 中设置 FlashVars=”name1=value1&name2=value2”
B.接受:在as中写入 var value1=application.parameters.name1 即可

2.HttpService

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.studioginteriors.com/byylptwz/2006/mxml" layout="absolute" initialize="initializeHandler(event)"> 
<mx:Script> 
<![CDATA[ 
private function initializeHandler(event:Event):void { 
countriesService.send(); 
} 
private function changeHandler(event:Event):void { 
statesService.send(); 
} 
]]> 
</mx:Script> 
<!-- 载入纯静态的xml数据 --> 
<mx:HTTPService id="countriesService" url="http://www.studioginteriors.com/byylptwz/states/xml/countries.xml" /> 
<!-- 载入由php生成的xml数据 --> 
<mx:HTTPService id="statesService" url="http://www.studioginteriors.com/byylptwz/states/xml/states.php"> 
<!-- 以下标签就是要发送到服务端的数据了,可以这样理解:有一个名为country的变量,它的值为花括号{}里的内容 --> 
<mx:request> 
<country>{country.value}</country> 
</mx:request> 
</mx:HTTPService> 
<mx:VBox> 
<!-- 此控件的数据由第一个<mx:HTTPService/>控件接收的内容提供,并且由这个ComboBox控制着第二个ComboBox所要显示的内容 -->
<mx:ComboBox id="country" dataProvider="{countriesService.lastResult.countries.country}" 
change="changeHandler(event)" /> 
<!-- 下面的ComboBox已经绑定了{statesService.lastResult.states.state},随它的数据改变而改变 --> 
<mx:ComboBox dataProvider="{statesService.lastResult.states.state}" /> 
</mx:VBox> 
</mx:Application> 

3.URLLoader

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.studioginteriors.com/byylptwz/2006/mxml" layout="absolute" initialize="initializeHandler(event)"> 
<mx:Script> 
<![CDATA[ 
private var _countriesService:URLLoader; 
private var _statesService:URLLoader; 
private function initializeHandler(event:Event):void { 
_countriesService = new URLLoader(); 
_countriesService.addEventListener(Event.COMPLETE, countriesCompleteHandler); 
_countriesService.load(new URLRequest("http://www.studioginteriors.com/byylptwz/states/xml/countries.xml")); 
_statesService = new URLLoader(); 
_statesService.addEventListener(Event.COMPLETE, statesCompleteHandler); 
XML.ignoreWhitespace = true; 
} 
private function countriesCompleteHandler(event:Event):void { 
var xml:XML = new XML(_countriesService.data); 
country.dataProvider = xml.children(); 
} 
private function statesCompleteHandler(event:Event):void { 
var xml:XML = new XML(_statesService.data); 
state.dataProvider = xml.children(); 
} 
private function changeHandler(event:Event):void { 
var request:URLRequest = new URLRequest("http://www.studioginteriors.com/byylptwz/states/xml/states.php"); 
var parameters:URLVariables = new URLVariables(); 
parameters.country = country.value; 
request.data = parameters; 
_statesService.load(request); 
} 
]]> 
</mx:Script> 
<mx:VBox> 
<mx:ComboBox id="country" change="changeHandler(event)" /> 
<mx:ComboBox id="state" /> 
</mx:VBox> 
</mx:Application> 

4.WebService方法1

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.studioginteriors.com/byylptwz/2006/mxml" layout="absolute" initialize="initializeHandler(event)"> 
<mx:Script> 
<![CDATA[ 
private function initializeHandler(event:Event):void { 
statesService.getCountries(); 
} 
private function changeHandler(event:Event):void { 
statesService.getStates(country.value); 
} 
]]> 
</mx:Script> 
<mx:WebService id="statesService" 
wsdl="http://www.studioginteriors.com/byylptwz/states/webservice/StatesService.php?wsdl"> 
<mx:operation name="getCountries" /> 
<mx:operation name="getStates" /> 
</mx:WebService> 
<mx:VBox> 
<mx:ComboBox id="country" 
dataProvider="{statesService.getCountries.lastResult}" change="changeHandler(event)" /> 
<mx:ComboBox dataProvider="{statesService.getStates.lastResult}" /> 
</mx:VBox> 
</mx:Application> 

5.WebService方法2

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.studioginteriors.com/byylptwz/2006/mxml" layout="absolute" initialize="initializeHandler(event)"> 
<mx:Script> 
<![CDATA[ 
private function initializeHandler(event:Event):void { 
statesService.getCountries.send( ); 
} 
private function changeHandler(event:Event):void { 
statesService.getStates.send( ); 
} 
]]> 
</mx:Script> 
<mx:WebService id="statesService" wsdl="http://www.studioginteriors.com/byylptwz/states/webservice/StatesService.php?wsdl"> 
<mx:operation name="getCountries" /> 
<mx:operation name="getStates"> 
<mx:request> 
<country>{country.value}</country> 
</mx:request> 
</mx:operation> 
</mx:WebService> 
<mx:VBox> 
<mx:ComboBox id="country" 
dataProvider="{statesService.getCountries.lastResult}" change="changeHandler(event)" /> 
<mx:ComboBox dataProvider="{statesService.getStates.lastResult}" /> 
</mx:VBox> 
</mx:Application>

 

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