question about DropDownButton of datagridview,is it possible to make a filter or selection? thank u very much

hi

    i'd like to ask a question.

    i have a datagridview and one column is a  DropDownButton.for the datasource of the  DropDownButton,the count could be for example 50 (for example, something like A1,A2,A3....A10,B1,B2,B3.....B10,C1.....C10,D1.....D10,E1.....E10),

      is it possible to let the user to use a filter to first select one value from A,B,C,D,E,then choose the value whichi is already filtered?

      thank u very much in advance

best regards

martin