Gridview within Gridview

Question

Hi

  i have 1 table

      ecode     ename     Photoname    Photofileid (Guid)
         1        aa            a.jpg            1234-34-3434
         1        aa            b.jpg            3234-34-3432
         2        bb            k.bmp           3456-22-2323

     I want in outer grid it should display ecode ,  ename  & edit Button
     In inner grid i want photoname , image (which is stored as file) & (Open/Delete) Button
     From above data there will be 2 inner rows , in 2 there will be 1 record

If Data exists for internal row then +sign or some other image should be displayed on left of outer grid which should be collapsible.

Thanx