Events of dropdown in a gridview in asp.net 2.0

Question

dear friends,

I got a gridview in asp.net 2.0 which have some employee id's in a dropdownlist(template column).Next have a template column employee name as a label.If i select an empid from ddl the corresponding employee name must be displayed in the second column of the gridview.Where to write the code for that event...


AMR