ArrayCollection as ComboBox dataProvider question

[blu3]

I have an ArrayCollection defined like this:

public var test:ArrayCollection = new ArrayCollection([
            { Id:"one", Amount:2000 },
            { Id:"two", Amount:1000 },
            { Id:"three", Amount:200 } ]);

And i would like to make 'Id' field of 'test' ArrayCollection as dataProvider for a ComboBox compoenent but can't figure it out how.I tried with following but get an error:

comboName.dataProvider = test.Id;

Can someone please help me with this?

thanks in advance