public void bindingDDLPhong(SqlConnection conn) { try { PhongLuuTruLogic phongLogic = new PhongLuuTruLogic(); DataTable dt = phongLogic.getAllSecByConnection(conn); ListItem root = new ListItem("-- All --", ""); string Code = ""; string Name = ""; // them đòng dầu tiên ddlPhong.Items.Add(root); foreach (DataRow r in dt.Rows) { Code = r["MaPhong"].ToString(); Name = r["TenPhong"].ToString(); ListItem item = new ListItem(Name, Code); ddlPhong.Items.Add(item); } ddlPhong.DataBind(); } catch (Exception ex) { Logger.logmessage(classobject, "bindingDDLPhong", ex.Message + ex.StackTrace); Response.Redirect("~/ThongBaoLoi.aspx", false); } }