GridView Item selection and Item Click event?

Question

Hi,
  Suppose I make a GridView whose Data items are bind by the data that defines in the class, I want to generate an output text when I click on the Gridview item or when I select any item in the gridview, or The Name of the data item in the gridview will be displayed when it is clicked. How can it is possible. Please help me out.
             Thanx