public static bool addFinanceBank(FinanceBank fb)
        {
            DBConnector dbcon = new DBConnector();

            //try
            //{
            if (dbcon.openConnection())
            {
                MySqlCommand cmd = new MySqlCommand();
                cmd.CommandText = "INSERT INTO finance_bank (bank_name, branch_name, account_number, account_type, begin_date, end_date, qualification, qual_year, employee_idemployee) VALUES (N'" + fb.bank_name + "', N'" + fb.branch_name + "', N'" + fb.account_number + "', N'" + fb.account_type + "', '" + fb.getBegin_date().ToString("yyyy-MM-dd") + "', '" + fb.getEnd_date().ToString("yyyy-MM-dd") + "', N'" + fb.qualification + "', N'" + fb.Qual_year + "', " + Employee.employee_id + ")";
                cmd.Connection = dbcon.connection;
                cmd.Prepare();
                cmd.ExecuteNonQuery();

                dbcon.closeConnection();
                return true;
            }
            else
            {
                dbcon.closeConnection();
                return false;
            }

            //}
            //catch (MySqlException e)
            //{
            //int errorcode = e.Number;
            //dbcon.closeConnection();
            //return false;
            //}
        }
        public static bool updateFinanceBank(FinanceBank fb)
        {
            //try
            //{

            DBConnector dbcon = new DBConnector();

            if (dbcon.openConnection())
            {

                MySqlCommand cmd = new MySqlCommand();
                cmd.CommandText = "UPDATE finance_bank SET bank_name=N'" + fb.bank_name + "', branch_name=N'" + fb.branch_name + "', account_number=N'" + fb.account_number + "', account_type=N'" + fb.account_type + "', begin_date='" + fb.getBegin_date().ToString("yyyy-MM-dd") + "', end_date='" + fb.getEnd_date().ToString("yyyy-MM-dd") + "', qualification=N'" + fb.qualification + "', qual_year=N'" + fb.Qual_year + "' WHERE employee_idemployee=" + Employee.employee_id + " AND idfinance_bank=" + fb.fb_id;
                cmd.Connection = dbcon.connection;
                cmd.Prepare();
                cmd.ExecuteNonQuery();

                dbcon.closeConnection();

                return true;
            }
            else
            {

                return false;
            }

            //}
            //catch (MySqlException e)
            //{
            //int errorcode = e.Number;
            //return false;
            //}
        }