如何使用Flex下載動態創建的服務器端文件？

我想從我的數據庫中導出一個表格到服務器上的excel文件，然後下載它。下面是我爲這個目的而開發的代碼：如何使用Flex下載動態創建的服務器端文件？

import flash.net.FileReference; 
import flash.net.URLRequest; 
public function sqlDownloadExcel():void { 
     var http:HTTPService = new HTTPService; 
     var parm:Object = new Object; 
     var sql:String; 

     sql = "insert into OPENROWSET('Microsoft.ACE.OLEDB.12.0', 'Excel 12.0;Database=C:\\inetpub\wwwroot\\myApp\\App_Data\\myExport.xls;', 'SELECT * FROM [Sheet1$]') SELECT * FROM myTable"; 
     parm.sql = sql; 
     parm.db = "myDatabase"; 
     http.url = "http://mywebsite.com/SQLconnector/sqlconnector.asp?irand="+Math.random(); 
     http.showBusyCursor = true; 
     http.request = sql; 
     http.addEventListener(ResultEvent.RESULT, function(e:ResultEvent):void {sqlDownloadExcelResult(e);}); 
     http.addEventListener(FaultEvent.FAULT, mssqlFault); 
     http.method = "POST"; 
     sqlToken = http.send(parm); 
} 
public function sqlDownloadExcelResult(event:ResultEvent):void{ 
     var request:URLRequest = new URLRequest("http://mywebsite/myApp/App_Data/myExport.xls"); 
     var fileRef:FileReference = new FileReference(); 
     fileRef.download(request);     
}

代碼正確地在服務器上創建的Excel文件，但在運行fileRef.download（請求）功能導致以下錯誤：

Error #2176: Certain actions, such as those that display a pop-up window, may only be invoked upon user interaction, for example by a mouse click or button press.

任何意見將不勝感激。謝謝

來源

2013-03-01 Fred