It's throwing because the cbGroupSelect.selectedItem.pkGroupID doesn't
exist when it's trying to call it the list_update function... The
combobox cbGroupSelect pulls its data from the provider first which
gives the index fields for the list object. I'm doing creation_complete
on the list object, but the object is created before the data provider
for the combobox has filled its data.
Here's the dump:
TypeError: Error #1009: Cannot access a property or method of a null
object reference.
at
Config/list_creationCompleteHandler()[X:\PackRat\www\src\Config.mxml:25]
at
Config/__lstItemList_creationComplete()[X:\PackRat\www\src\Config.mxml:9
8]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at
mx.core::UIComponent/dispatchEvent()[E:\dev\gumbo_beta2\frameworks\proje
cts\framework\src\mx\core\UIComponent.as:11749]
at mx.core::UIComponent/set
initialized()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\co
re\UIComponent.as:1525]
at
mx.managers::LayoutManager/validateClient()[E:\dev\gumbo_beta2\framework
s\projects\framework\src\mx\managers\LayoutManager.as:988]
at
mx.core::UIComponent/validateNow()[E:\dev\gumbo_beta2\frameworks\project
s\framework\src\mx\core\UIComponent.as:7249]
at
mx.core::UIComponent/creationCompleteHandler()[E:\dev\gumbo_beta2\framew
orks\projects\framework\src\mx\core\UIComponent.as:10846]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at
mx.core::UIComponent/dispatchEvent()[E:\dev\gumbo_beta2\frameworks\proje
cts\framework\src\mx\core\UIComponent.as:11749]
at mx.core::UIComponent/set
initialized()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\co
re\UIComponent.as:1525]
at
mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\gumbo_beta2\fr
ameworks\projects\framework\src\mx\managers\LayoutManager.as:759]
at
mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\gumbo_
beta2\frameworks\projects\framework\src\mx\managers\LayoutManager.as:106
9]
________________________________
From: [email protected] [mailto:[email protected]] On
Behalf Of Alex Harui
Sent: Monday, March 29, 2010 2:47 PM
To: [email protected]
Subject: Re: [flexcoders] Dataprovider and events
Post the entire stacktrace so we can see why it throws.
On 3/29/10 11:33 AM, "Scott" <[email protected]> wrote:
I know I've ran into this before but for some reason my memory
isn't
kicking in.
I've got a listbox that depends on a combobox to load before it
fires
its dataprovider. Without having the combobox loaded, the data
provider
for the listbox is null and it throws an error: #1009: Cannot
access a
property or method of a null object reference.
I know why it's happening but I can't seem to figure out a
workaround...
Any ideas?
--
Alex Harui
Flex SDK Team
Adobe System, Inc.
http://blogs.adobe.com/aharui <http://blogs.adobe.com/aharui>
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