嘿所以我最近开始使用Flash Builder 4.5，因此在构建移动应用程序时遇到了很多愚蠢的问题，特别是在将我的应用程序连接到后端服务器时。
我目前正在处理的事情应该是更新DataGrid，并从MySQL数据库中检索这些数据。
此代码在浏览器上清楚地显示数据，但数据网格未更新。相反，它会抛出以下错误。
TypeError: Error #1034: Type Coercion failed: cannot convert mx.utils::ObjectProxy@1e43bc1 to mx.collections.IList.
at views::connectPHPHomeView/userRequest_resultHandler()[C:\Documents and Settings\s4710935\Adobe Flash Builder 4.5\connectPHP\src\views\connectPHPHomeView.mxml:17]
at views::connectPHPHomeView/__userRequest_result()[C:\Documents and Settings\s4710935\Adobe Flash Builder 4.5\connectPHP\src\views\connectPHPHomeView.mxml:29]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at HTTPOperation/http://www.adobe.com/2006/flex/mx/internal::dispatchRpcEvent()[E:\dev\4.5.1\frameworks\projects\rpc\src\mx\rpc\http\HTTPService.as:993]
at mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/internal::resultHandler()[E:\dev\4.5.1\frameworks\projects\rpc\src\mx\rpc\AbstractInvoker.as:318]
at mx.rpc::Responder/result()[E:\dev\4.5.1\frameworks\projects\rpc\src\mx\rpc\Responder.as:56]
at mx.rpc::AsyncRequest/acknowledge()[E:\dev\4.5.1\frameworks\projects\rpc\src\mx\rpc\AsyncRequest.as:84]
at DirectHTTPMessageResponder/completeHandler()[E:\dev\4.5.1\frameworks\projects\rpc\src\mx\messaging\channels\DirectHTTPChannel.as:451]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at flash.net::URLLoader/onComplete()
有人可以指导我完成这个吗？
修改 的
这是PHP代码：
<?php
// -----------------------------------------------------------------------------
// Initialization of the sql server
// -----------------------------------------------------------------------------
// hostname or ip of server (for local testing, localhost should work)
$dbServer='localhost';
// username and password to log onto db server
$dbUser='root';
$dbPass='password';
// name of database
$dbName='test';
mysql_connect("$dbServer", "$dbUser", "$dbPass") or die(mysql_error());
mysql_select_db("$dbName") or die(mysql_error());
//Creating the table and inserting the values in it...
mysql_query("CREATE TABLE IF NOT EXISTS mariah_transaction_log(
id INT NOT NULL AUTO_INCREMENT,
PRIMARY KEY(id),
date DATE,
details VARCHAR(150),
debit DOUBLE,
credit DOUBLE,
balance DOUBLE)")
or die(mysql_error());
mysql_query("INSERT INTO mariah_transaction_log
(date, details, debit, credit, balance) VALUES('2011-08-08','Zellers','12.56','0.00','12343.54') ")
or die(mysql_error());
$username = $_GET["username"];
// $namedGreeting = mysql_query("SELECT * FROM customer_list WHERE username='$username'") or die(mysql_error());
// $row = mysql_fetch_array( $namedGreeting );
// echo "Hello ".$row['name']."!";
$Query = "SELECT * from mariah_transaction_log";
$Result = mysql_query( $Query );
$Return = "<users>";
while ( $User = mysql_fetch_object( $Result ) )
{
$Return .= "<user><date>".$User->date."</date><details>".
$User->details."</details><debit>".
$User->debit."</debit><credit>".
$User->credit."</credit><balance>".
$User->balance."</balance></user>";
}
$Return .= "</users>";
mysql_free_result( $Result );
print ($Return)
?>
以下是我的代码的MXML和AS3部分： 注意 为简单起见，添加了示例XML结果
<?xml version="1.0" encoding="utf-8"?>
<s:View xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" title="HomeView">
<fx:Script>
<![CDATA[
import mx.collections.IList;
import mx.collections.XMLListCollection;
import mx.rpc.events.ResultEvent;
protected function callService(event:ResultEvent):void
{
var results:XML = sampleResult;
var resultsList:XMLListCollection = results.users as XMLListCollection;
showTransactions_dg.dataProvider = resultsList;
}
]]>
</fx:Script>
<fx:Declarations>
<fx:XML id="sampleResult" xmlns="">
<users>
<user>
<date>2011-08-07</date>
<details>Camello Shop</details>
<debit>67.32</debit>
<credit>0.00</credit>
<balance>1233.42</balance>
</user>
<user>
<date>2011-08-07</date>
<details>Deposit</details>
<debit>0.00</debit>
<credit>600.00</credit>
<balance>1833.42</balance>
</user>
</users>
</fx:XML>
<s:HTTPService id="userRequest" url="{phpFile}"
method="GET" resultFormat="e4x"
result="callService(event)" useProxy="false">
<s:request xmlns="">
<username>{username_txt.text}</username>
</s:request>
</s:HTTPService>
<!-- The link to the php file -->
<fx:String id="phpFile">http://localhost:8080/connectPHP/phpFile.php </fx:String>
</fx:Declarations>
<s:TextInput id="username_txt" x="11" y="78"/>
<s:Label x="11" y="55" text="Username"/>
<s:Button id="getData_button" x="10" y="122" label="Done?"
click="userRequest.send()"/>
<s:Label id="showName_lbl" x="13" y="173" text="show name here"/>
<s:DataGrid id="showTransactions_dg" x="10" y="218" width="300" height="86">
<s:columns>
<s:ArrayCollection>
<s:GridColumn dataField="date" headerText="Date" />
<s:GridColumn dataField="details" headerText="Details"/>
<s:GridColumn dataField="debit" headerText="Debit"/>
<s:GridColumn dataField="credit" headerText="Credit"/>
<s:GridColumn dataField="balance" headerText="Balance"/>
</s:ArrayCollection>
</s:columns>
</s:DataGrid>
<s:Label id="testLbl" x="13" y="334" width="266" height="90" text="Label"/>
</s:View>
答案 0 :(得分：1)
在spark DataGrid中，dataProvider必须实现iList接口。看起来您正在返回XML并将其存储在通用对象中。通用对象不支持IList接口。
您应该向HTTPService添加结果处理程序，而不是将远程调用的结果绑定到dataGrid的dataProvider：
<s:HTTPService id="userRequest" url="{phpFile}"
method="GET" resultFormat="object" useProxy="false" result="onResult(event)">
然后将结果Handler中的数据转换为实现IList的内容。在这种情况下，我建议使用XMLListCollection。
protected function onResult(event:ResultEvent):void{
var resultsXML : XML = event.results as XML
showTransactions_dg.dataProvider = new XMLListCollection(resultsXML);
}
此代码是在浏览器中编写的，可能并不完美。