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  • 基于Flex的HTTPService(GET和POST)

    一.基于GET的HTTPService:

    <?xml version="1.0" encoding="utf-8"?>
    <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontSize="12">

      <mx:Script>
        <![CDATA[

          import mx.controls.Alert;
          import mx.rpc.events.ResultEvent;


          //对提交给后台的参数进行UTF-8的编码处理
          private function httpEncoding(param:String):String{
            return encodeURIComponent(param);
          }


          private function doRequest():void{
            btn_do.enabled=false;
            var url:String = "http://localhost:1337";
            srv.url = url;

            var params:URLVariables = new URLVariables();
            params.user = "fuland";
            params.psw = "123456";
            srv.send(params);
          }

          private function resultHandler(event:ResultEvent):void{
            Alert.show("与后台交互结束,前台开始取得的数据...","提示信息");
            btn_do.enabled=true;
          }

        ]]>
      </mx:Script>

      <mx:HTTPService id="srv" result="resultHandler(event);"/>


      <mx:Panel title="测试与后台交互" layout="absolute" width="100%" height="90%">
        <mx:Button id="btn_do" label="取得数据" click="doRequest();"/>
        <mx:Spacer height="1"/>
        <mx:DataGrid dataProvider="{srv.lastResult.catalog.product}" width="100%" height="100%" y="28"/>
      </mx:Panel>

    </mx:Application>

    二.基于POST的HTTPService:

    <?xml version="1.0" encoding="utf-8"?>
    <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontSize="12">

      <mx:Script>
        <![CDATA[

          import mx.controls.Alert;
          import mx.rpc.events.ResultEvent;
          import flash.display.MovieClip;
          import flash.events.MouseEvent;
          import flash.text.TextField;
          import flash.text.TextFormat;

          private function checkLogin(evt:ResultEvent):void
          {
            var mesh:XML = evt.result as XML;
            var str:String = evt.result.toString();
            Alert.show(str);
          }

          private function sendLogin(e:MouseEvent):void  
          {
            var employees:XML =
              <employees>
                <employee ssn="123-123-1234">
                  <name first="John" last="Doe"/>
                  <address>
                    <street>11 Main St.</street>
                    <city>San Francisco</city>
                    <state>CA</state>
                    <zip>98765</zip>
                  </address>
                </employee>
                <employee ssn="789-789-7890">
                  <name first="Mary" last="Roe"/>
                  <address>
                    <street>99 Broad St.</street>
                    <city>Newton</city>
                    <state>MA</state>
                    <zip>01234</zip>
                  </address>
                </employee>
            </employees>;

            login_user.contentType='application/xml'; //告诉服务器发送的格式
            login_user.send(employees);
          }

        ]]>
      </mx:Script>

      <mx:HTTPService id="login_user" result="checkLogin(event)" showBusyCursor="true" method="POST" resultFormat="e4x" url="http://127.0.0.1:1337" useProxy="false"/>

      //<mx:HTTPService id="login_user" result="checkLogin(event)" showBusyCursor="true" method="POST" resultFormat="xml" url="http://127.0.0.1:1337" useProxy="false"/>  如果有要在相应中得到XML对象则应该选择e4x,result就是Object类型 传“xml”的时候,用as转换无法成功转成xml,则返回null,但如果用强制转换XML(event.result).就可以成功。

      <mx:Panel resizeEffect="Resize" width="250" height="200" layout="absolute" title="Login System" horizontalCenter="0" verticalCenter="-2" id="panel1">
        <mx:Label x="10" y="10" text="Username:" id="label1"/>
        <mx:TextInput x="10" y="36" id="username"/>
        <mx:Label x="10" y="66" text="Password:" id="label2"/>
        <mx:TextInput x="10" y="92" id="password" displayAsPassword="true"/>
        <mx:Button x="10" y="122" label="Submit" id="Submit" click="sendLogin(event)"/>
      </mx:Panel>
    </mx:Application>

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  • 原文地址:https://www.cnblogs.com/fuland/p/3755374.html
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