public string GetCustomerName(int id)
        {
            dalCustomer dal  = new dalCustomer();
            DataTable   data = dal.GetCustomers();

            for (int i = 0; i < data.Rows.Count; i++)
            {
                DataRow row = data.Rows[i];
                if (Convert.ToInt32(row[0]) == id)
                {
                    return(row[1].ToString());
                }
            }
            return(null);
        }
        public DateTime GetCustomerBirthDay(int id)
        {
            DateTime    customerBD = new DateTime();
            dalCustomer dal        = new dalCustomer();
            DataTable   data       = dal.GetCustomers();

            for (int i = 0; i < data.Rows.Count; i++)
            {
                DataRow row = data.Rows[i];
                if (Convert.ToInt32(row[0]) == id)
                {
                    customerBD = Convert.ToDateTime(row[5]);
                }
            }
            return(customerBD);
        }
        public List <dtoCustomer> GetCustomers()
        {
            dalCustomer        dalCustomer = new dalCustomer();
            List <dtoCustomer> listEmp     = new List <dtoCustomer>();
            DataTable          Customers   = dalCustomer.GetCustomers();

            for (int i = 0; i < Customers.Rows.Count; i++)
            {
                dtoCustomer Customer = new dtoCustomer();
                DataRow     row      = Customers.Rows[i];
                Customer.CustomerID  = Convert.ToInt32(row[0]);
                Customer.FullName    = row[1].ToString();
                Customer.Gender      = row[2].ToString();
                Customer.PhoneNumber = row[3].ToString();
                Customer.Email       = row[4].ToString();
                Customer.BirthDay    = Convert.ToDateTime(row[5]);
                Customer.Address     = row[6].ToString();
                listEmp.Add(Customer);
            }
            return(listEmp);
        }