Gridview With Drop Down

working in vb.net 2.0

Sir,

I have made a field to enter Category Name and a DropDown which has fixed values as [eg: All, SpecialProducts].... When enter's category name in textbox and select value from dropdown, then it's saved in database, and below there is a gridview which shows category name as it get saved in database.

                                    Now, if suppose by mistake user would selected All from dropdown and saved the category, then he wants to change the last saved categorie's dropdown option from All to SpecialProducts from Gridview itself, How could it be done using dropdown in gridview...?

Hope you will do some needfull...... :)