protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { List <KoDTicketingLibrary.DTO.Promotion> listPromo = VistaBOL.GetAllPromostionCode(); int list = listPromo.Count; ddlAgent.Items.Add("SELECT"); for (int i = 0; i < list; i++) { ddlAgent.Items.Add(listPromo[i].PromotionCode); } ddlAgent.DataBind(); } }