How to bind the value for dropdownlist in Template Field

protected void gvResults_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow) //skip header row
    {
        DropDownList ddOpp = (DropDownList)e.Row.Cells[5].FindControl("pipddl");
        ddOpp.Datasource = dt 
ddOpp.DataValueField ="SomeField"
ddOpp.DataTextField ="SomeField"
ddOpp.dataBind();
    }
}