使用WebService

WebService返回String
WebServiceTest.mxml

<? xml version="1.0" encoding="utf-8" ?>
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"  layout ="vertical"  creationComplete ="wsBlogAggr.Readxml.send()" >
     < mx:Script >
         <![CDATA[
            import mx.rpc.events.ResultEvent;    
            import mx.controls.Alert;
            
            public function wsHandle(e:ResultEvent):void
            {
                ddd.text = e.result as String;
            }
         ]]>
     </ mx:Script >
     < mx:Label  text ="Label"  id ="ddd"  fontSize ="12" />
     < mx:WebService  id ="wsBlogAggr"  wsdl ="http://localhost:2250/flex%203.0%20asp.net%20test/WebServiceTest.asmx?wsdl"  useProxy ="false" >
     < mx:operation  name ="Readxml"  result ="wsHandle(event);"  fault ="Alert.show(event.fault.faultString,'Error')"   />
     </ mx:WebService >
</ mx:Application >

ActiveWebService.mxml，使用动态创建WebService组件方法调用WebService。必须调用loadwsdl方法下载ws说明文件，否则即使调用webservice的方法也是没有反应的。如果WebService方法要求提供参数，可在send()中加上，如send("新闻表",2)

<? xml version = " 1.0 "  encoding = " utf-8 " ?>
< mx:Application xmlns:mx = " http://www.adobe.com/2006/mxml "  layout = " vertical "  creationComplete = " AvitHandle() " >
     < mx:Script >
         <! [CDATA[
            import mx.rpc.events.FaultEvent;
            import mx.rpc.soap.WebService;
            import mx.rpc.events.ResultEvent;    
            import mx.controls.Alert;
            
             public  function AvitHandle(): void
            {
                var web:WebService  =   new  WebService();
                web.wsdl  =   " http://localhost:2250/flex%203.0%20asp.net%20test/WebServiceTest.asmx?wsdl " ;
                 // 必须调用loadwsdl方法下载ws说明文件，否则即使调用webservice的方法也是没有反应的
                web.loadWSDL();
                 // 添加成功调用侦听
                web.addEventListener(ResultEvent.RESULT,wsHandle);
                 // 添加错误调用侦听
                web.addEventListener(FaultEvent.FAULT, fault);
                web.Readxml.send();
            }
            
             // 成功调用处理函数
             public  function wsHandle(e:ResultEvent): void
            {
                ddd.text  =  e.result  as  String;
            }
            
             // 错误处理函数
             public  function fault(e:FaultEvent): void
            {
                Alert.show(e.fault.faultString, ' Error ' )
            }
        ]] >
     </ mx:Script >
     < mx:Label text = " Label "  id = " ddd "  fontSize = " 12 " />
</ mx:Application >

ServiceTest.asmx

using  System;
using  System.Web;
using  System.Collections;
using  System.Web.Services;
using  System.Web.Services.Protocols;

using  System.Xml;


///   <summary>
///  WebServiceTest 的摘要说明
///   </summary>
[WebService(Namespace  =   " http://tempuri.org/ " )]
[WebServiceBinding(ConformsTo  =  WsiProfiles.BasicProfile1_1)]
public   class  WebServiceTest : System.Web.Services.WebService {

     public  WebServiceTest () {

         // 如果使用设计的组件，请取消注释以下行 
         // InitializeComponent(); 
    }

    [WebMethod]
     public  String Readxml()
    {
         return   " 你还好吗？ " ;
    }
    
}

使用WebService返回xml格式字符串，供tree组件使用。注意,tree组件要使用 <node label="Mail">，属性的方法定义，而不是字段。xml可以嵌套，tree组件自动解析。
eem.mxml

<? xml version = " 1.0 "  encoding = " utf-8 " ?>
< mx:Application xmlns:mx = " http://www.adobe.com/2006/mxml "  layout = " vertical "  creationComplete = " AvitHandle() " >
     < mx:Script >
         <! [CDATA[
            import mx.rpc.events.FaultEvent;
            import mx.rpc.soap.WebService;
            import mx.rpc.events.ResultEvent;    
            import mx.controls.Alert;
            
             public  function AvitHandle(): void
            {
                var web:WebService  =   new  WebService();
                web.wsdl  =   " http://localhost:2250/flex%203.0%20asp.net%20test/WebServiceTest.asmx?wsdl " ;
                 // 必须调用loadwsdl方法下载ws说明文件，否则即使调用webservice的方法也是没有反应的
                web.loadWSDL();
                 // 添加成功调用侦听
                web.addEventListener(ResultEvent.RESULT,wsHandle);
                 // 添加错误调用侦听
                web.addEventListener(FaultEvent.FAULT, fault);
                web.Readxml2.send();
            }
            
             // 成功调用处理函数
             public  function wsHandle(e:ResultEvent): void
            {
                ddd.text  =  e.result  as  String;    
                var menus:XML  =  XML(e.result  as  String);
                var results:XMLList  =  menus.node;
                tree.dataProvider  =  results;
            }
            
             // 错误处理函数
             public  function fault(e:FaultEvent): void
            {
                Alert.show(e.fault.faultString, ' Error ' )
            }
        ]] >
     </ mx:Script >
     < mx:Label text = " Label "  id = " ddd "  fontSize = " 12 " />
     < mx:Tree id = " tree "  width = " 218 "  height = " 397 "  labelField = " @label " ></ mx:Tree >
</ mx:Application >

Webservice方法源代码

    [WebMethod]
     public   string  Readxml2()
     {
        string str;
        str = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>";
        str += "<menus>";

        str += "<node label=\"Mail\">";
        str += "<node label=\"Inbox\" />";
        str += "<node label=\"Calendar\" />";
        str += "</node>";

        str += "<node label=\"China\">";
        str += "<node label=\"guangxi\" />";
        str += "<node label=\"beijing\" />";
        str += "</node>";

        str += "</menus>";

        return str;
    }