Checkbox selected field from xml problem

I am trying to set the selected value of a checkbox from a dataprovider (an xml file).

<mx:DataGridColumn width="75" headerText="show/hide" dataField="@hidden">
                <mx:itemRenderer>
                    <mx:Component>
                        <mx:CheckBox  selected="{data.@hidden}" />
                    </mx:Component>
                </mx:itemRenderer>
            </mx:DataGridColumn>

The problem I am having is, I think, that it's not recognizing the attribute in the html as boolean "hidden="false" or hidden="true". I can get the value, but开发者_JAVA技巧 how to I make it recognize the value as something other than a string?

I think you can wrap it in the type {Boolean(data.@hidden)}

An alternative if wrapping it doesn't work you can declare a boolean

var myBool:Boolean = new Boolean();

And then do a determination:

myBool = (data.@hidden=="true");

EDIT I don't have much of your code so I can't really test this but I think it should work.

create an MXML component based on the checkbox with this, for my example it will be called ItemRendCheckBox:

<?xml version="1.0" encoding="utf-8"?>
<mx:CheckBox xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        <![CDATA[
            override public function set data( value:Object ):void{
                super.data = value;
                this.selected = Boolean(data);
            }
        ]]>
    </mx:Script>
</mx:CheckBox>

Then in your dataGrid XML do this:

<mx:DataGridColumn width="75" headerText="show/hide" dataField="@hidden">
  <mx:itemRenderer>
    <mx:Component>
       <mx:ItemRendCheckBox/>
    </mx:Component>
  </mx:itemRenderer>
</mx:DataGridColumn>

I had a similar problem, to get around this just drop this code snippet into your curly brackets:

('false' == data.@hidden) ? false : true

Basically the value you're going to get from data.@hidden will not be a boolean, but a string, hence the use of the quotation marks around false.