TypeError: Error #1034: Type Coercion failed: cannot convert mx.collections::ArrayCol

By cy163 | Jul 3, 2009

I have a MXML file as follows

Code:


<?xml version="1.0" encoding="utf-8"?>  

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="http.send();initApp()">  

    <mx:Script>  

        <![CDATA[  

            import mx.rpc.events.ResultEvent;  

            import mx.collections.ArrayCollection;  

            [Bindable]  

            public var myData:ArrayCollection;  

            

            private function initApp():void {

                                this.http.send();

                        }

                        

                        

            public function resultHandler(event:ResultEvent):void{  

//                        error.text = event.result as String;  

                        myData = new ArrayCollection(event.result.shuju.shuiguo);             

                }
         ]]>  

    </mx:Script>
   <!–<mx:HTTPService id="http" url="http://localhost:8080/web.xml" useProxy="false" result="resultHandler(event)"/>–>  

    <mx:HTTPService id="http" url="http://localhost:8080/web.xml" useProxy="false" result="myData=ArrayCollection(http.lastResult.shuju.shuiguo)"/>

     
     <mx:DataGrid dataProvider="{myData}"

x="80" y="141" width="262" height="92"

id="shippingOptionsList"

editable="false" enabled="true">

<mx:columns>

<mx:DataGridColumn headerText="Task1" dataField="Task1" />

<mx:DataGridColumn headerText="Task2" dataField="Task2" />

</mx:columns>

</mx:DataGrid>

</mx:Application>

it works well. Howeve, when I replace

Code:



<mx:HTTPService id="http" url="http://localhost:8080/web.xml" 

useProxy="false" 

result="myData=ArrayCollection(http.lastResult.shuju.shuiguo)"/>

with

Code:



<mx:HTTPService id="http" url="http://localhost:8080/web.xml" 

useProxy="false" result="resultHandler(event)"/>

i.e., using resultHandler(event) to handle the received data. I got the following error messages. I could not figure out why? Please help.

Code:

TypeError: Error #1034: Type Coercion failed: cannot convert mx.collections::ArrayCollection@36f5741 into Array。

        at TEST2/resultHandler()[C:\Documents and Settings\Administrator\My Documents\Flex Builder 3\TEST2\src\TEST2.mxml:17]

        at TEST2/__http_result()[C:\Documents and Settings\Administrator\My Documents\Flex Builder 3\TEST2\src\TEST2.mxml:23]

        at flash.events::EventDispatcher/dispatchEventFunction()

        at flash.events::EventDispatcher/dispatchEvent()

        at mx.rpc.http.mxml::HTTPService/http://www.adobe.com/2006/flex/mx/internal::dispatchRpcEvent()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\rpc\http\mxml\HTTPService.as:290]

        at mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/internal::resultHandler()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\rpc\AbstractInvoker.as:193]

        at mx.rpc::Responder/result()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\rpc\Responder.as:43]

        at mx.rpc::AsyncRequest/acknowledge()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\rpc\AsyncRequest.as:74]

        at DirectHTTPMessageResponder/completeHandler()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\messaging\channels\DirectHTTPChannel.as:403]

        at flash.events::EventDispatcher/dispatchEventFunction()