获取任意组件的ID或其他属性值

import mx.core.FlexGlobals;

import mx.core.Application;

FlexGlobals.topLevelApplication.任意组件ID.text="theText";（Flex4写法）

Application.application.任意组件ID.text = "theText";(Flex3写法）

package com.user.command
{
	import com.adobe.cairngorm.commands.ICommand;
	import com.adobe.cairngorm.control.CairngormEvent;
	import com.user.event.UserEvent;
	import com.user.service.UserProxy;
	
	import mx.collections.ArrayCollection;
	import mx.controls.Alert;
	import mx.core.Application;
	import mx.core.FlexGlobals;
	import mx.rpc.IResponder;  
	
	public class UserCommand implements ICommand, IResponder
	{
		public function UserCommand()
		{
		}
		
		//执行调用
		public function execute(event:CairngormEvent):void
		{
			var userEvent:UserEvent=UserEvent(event);
			var userService:UserProxy=new UserProxy(this);
			userService.login(userEvent.username,userEvent.password);
		}
		
		//更新模型
		public function result(data:Object):void
		{
			var message:String=data.result as String;
			
			
//			Application.application.mainContainer.removeElement(Application.application.loginPanel);
//			
//			Application.application.main_.message_label.text=message;
			
			FlexGlobals.topLevelApplication.mainContainer.removeElement(Application.application.loginPanel);
			
			FlexGlobals.topLevelApplication.main_.message_label.text=message;

			
		}
		
		public function fault(info:Object):void
		{
			Alert.show("Fail Error ");
		}
	}
}