public string GetTaxRate() { try { string TaxRate = string.Empty; DBO.MaintainAcceptDBO dbo = new DBO.MaintainAcceptDBO(ref USEDB); DataTable dtResult = dbo.GetTaxRate(); if (dtResult.Rows.Count > 0) { TaxRate = dtResult.Rows[0]["TaxRate"].ToString(); } else { throw new Exception("無法取得稅率資料"); } return TaxRate; } catch (Exception ex) { throw ex; } }