Dynamic definition of binding expression.

Question

I can use a standard textInput like this:
<mx:TextInput   text="{Root.elementA}" \>
and this works well, when I use an HttpService to replace Root, the TextInput is updated.  However...
I have defined my own custom fields, which take a "tag" attribute that allows them to update the server when they are changed.  Thus I have
<my:FredsTextInput tag="A0500C"/>  and I would really like to bind to the data WITHOUT repeating text="{Root.A0500C}" for each element.  I've got about 500 elements.  I have tried all the different definitions I can think of for FredsTextInput with no success.  Does Anyone have a solution?  If it matters, I'm using Flex 4 and here is my latest failure, which just shows  "{Globals.AssessmentData.A1300B}" in the TextInput field.
<mx:TextInput xmlns:fx="http://ns.adobe.com/mxml/2009"
              xmlns:s="library://ns.adobe.com/flex/spark"
              xmlns:mx="library://ns.adobe.com/flex/mx"
              xmlns:com="components.*"
             change="{AssessmentService.saveChanges(id,event.target.selectedItem.value)}"      >
<mx:Script>
    <![CDATA[
        [Bindable] private var _tag:String = "undefined"
        public function set tag(name:String):void {
            //Globals.log("setting tag on checkbox "+name);
            _tag=name;
            var longname = "{Globals.AssessmentData."+name+"}";
            super.text = "{Globals.AssessmentData.A1300B}";
            toolTip = name +"="+ super.text;           
    ]]>
</mx:Script>
</mx:TextInput>

Answer 1

Create your bindings with an ActionScript loop?