public void addDelivayBoy(Add_Delivery_Boy booy)
        {
            delivery_boy     boy  = new delivery_boy();
            string           ordb = "Data source=orcl;User Id=hr; Password=hr;";
            OracleConnection conn;

            conn = new OracleConnection(ordb);
            conn.Open();
            OracleCommand cmd = new OracleCommand();

            cmd.Connection = conn;
            boy.setName(booy.Full_Name_Delivery_Boy_box.Text.ToString());
            boy.setId(int.Parse(booy.ID_Delivery_Boy_box.Text.ToString()));
            boy.setPhone_no(booy.Phone_No_delivery_boy_box.Text.ToString());


            cmd.CommandText = "insert into Delivery_boy values (:Full_Name,:ID,:Phone_No,:No_Orders)";
            cmd.Parameters.Add("Full_Name", boy.getName());
            cmd.Parameters.Add("ID", boy.getId());
            cmd.Parameters.Add("Phone_No", boy.getPhone_no());
            cmd.Parameters.Add("No_Orders", "0");

            int r = cmd.ExecuteNonQuery();

            if (r != -1)
            {
                MessageBox.Show("New Delivery Boy is added");
            }
        }
        private void Add_Delivery_boy_Click(object sender, EventArgs e)
        {
            Add_Delivery_Boy add_boy = new Add_Delivery_Boy();

            add_boy.Show();
        }