How to load images in FLEX datagrid using Actionscript

Hello friends,

I need a small help from you. i am working in flex and in flash builder 4. Now my requirement was, i want to display images inside datagrid. I found a solution in mxml when searching in net. But i need a solution in actionscript. Can anyone help me out. I am new to flex environment.
i am attaching the mxml code along with this.

your help will be appreciated.

Rajesh