http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=1fecccba
DK
Hi Rick,
You're right, the display value for a list must not be an empty string (""). This is a known issue.
Please make use of the prompt property on the combobox if possible.
If this does not work for you, because you want to allow users de-select their previous selection on a combobox, you should use a single space character (" ") as a workaround. This code sample shows how to do this, if you have no way of making that change on the server side:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
<![CDATA[
import mx.utils.StringUtil;
import mx.collections.ArrayCollection;
[Bindable]
public var stateArray:Array = ["", "AL", "AK", "AZ", "AR", "CA", "CO", "CT", "DE", "DC", "FL", "GA", "HI","ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME", "MD", "MA", "MI", "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ", "NM", "NY", "NC", "ND", "OH", "OK", "OR", "PA", "PR", "RI", "SC", "SD", "TN", "TX", "UT", "VT", "VA", "WA", "WV", "WI", "WY"];
[Bindable]
public var stateInfo:ArrayCollection;
private function modifyData() : void
{
stateInfo = new ArrayCollection();
for(var i:Number=0; i < stateArray.length; i++) {
var item:Object;
if(String(stateArray[i])) {
item = new Object();
item.label = stateArray[i];
stateInfo.addItem(item);
} else {
item = new Object();
item.label = " ";
stateInfo.addItem(item);
}
}
}
]]>
</mx:Script>
<mx:VBox>
<mx:TextInput text="{stateArray.toString()}"/>
<mx:TextInput text="{foo.selectedItem.data}"/>
<mx:ComboBox id="foo" dataProvider="{stateInfo}" creationComplete="modifyData()" prompt=" " />
</mx:VBox>
</mx:Application>
As the issue is known there's no need to file a new bug. Just in case and for future issues, here's the address to our wish form:
http://www.adobe.com/support/email/wishform/
Best regards,
Patrick
From: flexcoders@yahoogroups.com [mailto: flexcoders@yahoogroups.com] On Behalf Of Rick Root
Sent: Monday, October 16, 2006 3:04 PM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Disappearing list items
so, I solved this problem.
My data provider was a query returned by a remoting call created like this:
<cfquery name="qry2" dbtype="query">
SELECT
TABLKEY, TABLFLD
FROM application.udf.getalldropdowns
WHERE
TABLID = '010'
ORDER BY TABLFLD
</cfquery>
<cfset queryaddrow(qry2,1)>
<cfset querysetcell(qry2,"TABLKEY","")>
<cfset querysetcell(qry2,"TABLFLD","")>
<cfquery name="qry" dbtype="query">
SELECT * FROM qry2 ORDER BY TABLFLD
</cfquery>
<cfset retval.COUNTRIES = qry>
I did it this way so I could always have a "blank" item in the dropdown....
The solution was to change the second querysetcell line to be the following:
<cfset querysetcell(qry2,"TABLFLD","- not selected -")>
For some reason, the blank item caused every 5th label to disappear for
no apparent reason.
This seems like a bug. What's the address to report flex bugs to?
Rick
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