httpService和XMLListCollection

问题描述

我的项目出现了一个问题，我尝试用我的xml数据填充一个列表，这些数据是从一个php文件中获取的。我用httpservice调用php文件，这个文件返回xml数据。现在看来有一个问题，但我没有得到任何错误。我只是知道调试后，我的XMLListCollection仍然为空。

这是我的代码：

 <？xml version =1.0encoding =utf-8？> 
  xmlns：s =library：//ns.adobe.com/flex/spark 
 xmlns：mx =library：//ns.adobe.com/flex/mx
 xmlns：components =components。*
 creationComplete =httpService.send（） > 
 
< s：layout> 
  horizo​​ntalAlign =center/> 
< / s：layout> 
< fx：Script> 
<！[CDATA [
 import mx.rpc.events.ResultEvent; 
导入mx.collections.ArrayCollection; 
导入mx.collections.XMLListCollection; 
 
导入mx.rpc.events.FaultEvent; 
导入mx.controls.Alert; 
 private var alert：Alert; 
 $ b private function httpService_fault（evt：FaultEvent）：void {
 var title：String = evt.type +（+ evt.fault.faultCode +）; 
 var text：String = evt.fault.faultString; 
 alert = Alert.show（text，title）; 
 Bezoekers.removeAll（）; 
 
 
 private function httpService_result（evt：ResultEvent）：void {
 var xmlList：XMLList = XML（evt.result）.bezoekers.bezoeker; 
 Bezoekers = new XMLListCollection（xmlList）; 
 
} 
 
 
 
 
 
 
]]> 
< / fx：Script> 
< fx：声明> 
< s：HTTPService id =httpService
 url =http：//localhost/projectnieuw/src/data/bezoekersList.php
 resultFormat =e4x
故障= httpService_fault（事件）; 
 result =httpService_result（event）/> 
<！ - < fx：Model id =lijstAlleLedensource =httpAlleLeden/>  - > 
<！ - < s：ArrayCollection id =acBezoekerssource ={Bezoekers}/>  - > 
< s：XMLListCollection id =Bezoekers/> 
< / fx：声明> 
 
 
 
 
 
<组件：标题/> 
< s：HGroup gap =50> 
 
< components：BezoekersList bezoekerList ={Bezoekers}/> 
< components：ReservationForm /> 
 
< / s：HGroup> 
 
< / s：Application> 
  

我似乎并没有得到什么错。

预先致谢

来自比利时的问候

解决方案

你的XMLListCollection保持为null 表示 Bezoekers = new XMLListCollection（xmlList）; 给它null。所以首先尝试跟踪那个结果不是从服务器端的空。要测试服务器端的响应，你有一个窍门是，在Web浏览器中打开你的HTTPService的URL，并在Web浏览器中获取XML数据。如果获得成功，则尝试 resultFormat =xml而不是 resultFormat =e4x并读取，以了解如何使用它。它也有一些针对XML的案件到案例的解决方案。

这可以帮助你...

I have a problem with my project where I try to fill a list with my xml data that I get out of an php file. I call the php file with a httpservice and this file returns xml data. Now it seems that there is a problem, but I don't get any error. I just know after debugging that my XMLListCollection remains null.

Here is my code :

<?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" 
                 xmlns:components="components.*"
                 creationComplete="httpService.send()">

    <s:layout>
        <s:VerticalLayout paddingTop="20" gap="20" 
                          horizontalAlign="center" />
    </s:layout>
    <fx:Script>
        <![CDATA[
            import mx.rpc.events.ResultEvent;
            import mx.collections.ArrayCollection; 
            import mx.collections.XMLListCollection; 

            import mx.rpc.events.FaultEvent;
            import mx.controls.Alert;
            private var alert:Alert;

            private function httpService_fault(evt:FaultEvent):void {
                var title:String = evt.type + " (" + evt.fault.faultCode + ")";
                var text:String = evt.fault.faultString;
                alert = Alert.show(text, title);
                Bezoekers.removeAll();
            }

            private function httpService_result(evt:ResultEvent):void {
                var xmlList:XMLList = XML(evt.result).bezoekers.bezoeker;
                Bezoekers = new XMLListCollection(xmlList);

            }






        ]]>
    </fx:Script>
    <fx:Declarations>
        <s:HTTPService id="httpService"
                       url="http://localhost/projectnieuw/src/data/bezoekersList.php"
                       resultFormat="e4x"
                       fault="httpService_fault(event);"
                       result="httpService_result(event)" />
        <!--<fx:Model id="lijstAlleLeden" source="httpAlleLeden" />-->
        <!--<s:ArrayCollection id="acBezoekers" source="{Bezoekers}"/>-->
        <s:XMLListCollection id="Bezoekers"/>
    </fx:Declarations>





    <components:Heading/>
    <s:HGroup gap="50">

        <components:BezoekersList bezoekerList="{Bezoekers}" />
        <components:ReservationForm/>

    </s:HGroup>

</s:Application>

I don't seem to get what's wrong.

Thanks in advance

Greetings from Belgium

解决方案

your XMLListCollection remains null means Bezoekers = new XMLListCollection(xmlList); gives to it null. so first of all try to trace that result was not null from server-side. To test server-side response, you have one trick is that, open your HTTPService's URL in web-browser and get XML data in Web-browser. if get success then try resultFormat="xml" instead of resultFormat="e4x" and read documentation of HTTPService's result Type to know how to use it. it has also some case-to-case basis solution for XML.

May this will help you...

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