Flex4之与后台服务器通信方式：WebService

这次说的关于Flex的WebService来自于一位网友的贡献，看了后十分清晰，果然比纯JAVA的WebService要方便许多，只需要提供一个WebService服务地址，如中国气象局的免费服务【当然大家都知道这个界面就是个XML】：http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl

通过下面这个网址可以输入城市，查询城市天气预报

http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?op=getWeatherbyCityName

我们现在要做的就是实现这个功能，在Flex上面非常容易，贴上代码

只有一个mxml即可

<spanstyle="font-size: medium;"><?xmlversion="1.0"encoding="utf-8"?>
<s:Applicationxmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"minWidth="955"minHeight="600">
    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
        <mx:WebServiceid="webService"wsdl="http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl"
                       showBusyCursor="true"result="onLoad(event)"fault="faultHandler(event)"/>
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            import mx.controls.Alert;
            import mx.rpc.events.FaultEvent;
            import mx.rpc.events.ResultEvent;
            private function onLoad(event:ResultEvent):void{
                //Alert.show(event.result.toString(),"WebService Results");
                var weatherInfo:ArrayCollection = (event.result) as ArrayCollection;
                for(var i:int=0;i<weatherInfo.length;i++){
                    myWeatherReport.text+=weatherInfo[i]+"
";
                }
            }
            private function faultHandler(event:FaultEvent):void{
                Alert.show(event.fault.toString(),'WebService Error');
            }


            protected function button1_clickHandler(event:MouseEvent):void
            {
                webService.getWeatherbyCityName(cityName.text);
            }

        ]]>
    </fx:Script>
    <s:Panelx="48"y="21"width="679"height="423"title="城市天气预报查询FLEX">
        <s:TextInputx="135"y="26"id="cityName"/>
        <s:Labelx="43"y="31"text="请输入城市名称"/>
        <s:Buttonx="286"  y="26"label="点击查询"click="button1_clickHandler(event)"/>
        <s:TextAreaid="myWeatherReport"x="31"y="68"width="615"height="297"/>
    </s:Panel>

</s:Application>
</span>

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 -->
		<mx:WebService id="webService" wsdl="http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl"
					   showBusyCursor="true" result="onLoad(event)" fault="faultHandler(event)"/>
	</fx:Declarations>
	<fx:Script>
		<![CDATA[
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
			private function onLoad(event:ResultEvent):void{ 
				//Alert.show(event.result.toString(),"WebService Results"); 
				var weatherInfo:ArrayCollection = (event.result) as ArrayCollection; 
				for(var i:int=0;i<weatherInfo.length;i++){ 
					myWeatherReport.text+=weatherInfo[i]+"
"; 
				} 
			} 
			private function faultHandler(event:FaultEvent):void{ 
				Alert.show(event.fault.toString(),'WebService Error'); 
			} 
			

			protected function button1_clickHandler(event:MouseEvent):void
			{
				webService.getWeatherbyCityName(cityName.text);
			}

		]]>
	</fx:Script>
	<s:Panel x="48" y="21" width="679" height="423" title="城市天气预报查询FLEX">
		<s:TextInput x="135" y="26" id="cityName"/>
		<s:Label x="43" y="31" text="请输入城市名称"/>
		<s:Button x="286"  y="26" label="点击查询" click="button1_clickHandler(event)"/>
		<s:TextArea id="myWeatherReport" x="31" y="68" width="615" height="297"/>
	</s:Panel>
	
</s:Application>

效果图就是下面这样的