Accessing _root variable from flex

Question

In Flex code, I am trying to access a variable that I pass to
the Flash object through FlashVars argument. In Flash it is easy to
do as all the variables that as passed as a part of FlashVars
appear as a part of _level0 or _root. Is there any way to do it in
Flex?
I am trying pass a large dataset directly to Flash without an
http call (creating a desktop application). Does anyone know if the
FlashVars approach will work for a large dataset or is there a
better approach?
Thanks

Answer 1

From the Flex 2.0.1 help (search for Using flashVars):
The following example sets the values of the firstname,
middlename, and lastname flashVars properties inside the
<object> tag in a simple wrapper:
<?xml version="1.0"?>
<!-- wrapper/ApplicationParameters.mxml -->
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
creationComplete="initVars()">
<mx:Script><![CDATA[
// Declare bindable properties in Application scope.
[Bindable]
public var myName:String;
[Bindable]
public var myHometown:String;
// Assign values to new properties.
private function initVars():void {
myName = Application.application.parameters.myName;
myHometown = Application.application.parameters.myHometown;
]]></mx:Script>
<mx:VBox>
<mx:HBox>
<mx:Label text="Name: "/>
<mx:Label text="{myName}" fontWeight="bold"/>
</mx:HBox>
<mx:HBox>
<mx:Label text="Hometown: "/>
<mx:Label text="{myHometown}" fontWeight="bold"/>
</mx:HBox>
</mx:VBox>
</mx:Application>
If you are using the wrapper that is generated by Flex Data
Services or wrappers that are included in the
resources/html-templates directory, your wrapper might not look the
same, but the basic approach to passing the flashVars variable is.
For example, you might insert flashVars variables by appending them
to a function parameter, as the following example shows:
"flashvars","historyUrl=%2Fflex%2Fflex%2Dinternal%3Faction%3Dhistory%5Fhtml&lconid="
+ lc_id + "&firstName=Nick&lastName=Danger",