dropdown list in asp.net gridview with c#

[solution]

Hello,
i have a Gridview control in asp.net with c# 2.0.
The first is having dropdown list.
i want to populate ddl with item_code externally.
when i select an item_Code, i should fill with the respective data of that Item_Code from Item_Master.

Please help me.

[Hack]

What is your data source? Are you storing your info in a database?

What code have you worked up so far?