public void getIDTaiKhoanNganHangConHanMuc() { try { string ReturnValue = "-1"; float valueTransaction = float.Parse(Request.Form["valueTransaction"].ToString()); TaiKhoanNganHangManagement taiKhoanNganHangManagement = new TaiKhoanNganHangManagement(); IList <TaiKhoanNganHang> listTaiKhoanNganHang = taiKhoanNganHangManagement.getHanMucTrongNgayTaiKhoanNganHang(); int i; for (i = 0; i < listTaiKhoanNganHang.Count; i++) { if (listTaiKhoanNganHang[i].HanMucTrongNgay >= valueTransaction) { break; } } if (i < listTaiKhoanNganHang.Count) { ReturnValue = listTaiKhoanNganHang[i].ID.ToString(); } else { ReturnValue = "-1"; } HttpContext.Current.Response.Clear(); HttpContext.Current.Response.ContentType = "application/json; charset=utf-8"; String resultResponse = "{\"Result\":" + ReturnValue + "}"; HttpContext.Current.Response.Write(resultResponse); HttpContext.Current.Response.End(); } catch (Exception ex) { //HttpContext.Current.Response.Write("err: " + ex.ToString()); return; } }