public bool EditDrug(Drug drug, int drugId, Form form)
        {
            bool isSuccess = false;

            SqlConnection conn = new SqlConnection(myconnstring);

            try
            {
                string query = "Update Drug Set drug = @drug, cost = @cost WHERE drug_id = @drugId";

                SqlCommand cmd = new SqlCommand(query, conn);

                cmd.Parameters.AddWithValue("@drug", drug.name);
                cmd.Parameters.AddWithValue("@cost", drug.cost);
                cmd.Parameters.AddWithValue("@drugId", drugId);


                conn.Open();
                int rows = cmd.ExecuteNonQuery();

                if (rows > 0)
                {
                    isSuccess = true;
                }
                else
                {
                    isSuccess = false;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
                //CustomMessageBox cm = new CustomMessageBox("Failed to add patient", form);
                //cm.Show();
            }
            finally
            {
                conn.Close();
            }
            return(isSuccess);
        }
        public bool AddNewDrug(Drug drug, Form form)
        {
            bool isSuccess = false;

            SqlConnection conn = new SqlConnection(myconnstring);

            try
            {
                string query = "INSERT INTO Drug (drug_id, drug, cost) VALUES (NEXT VALUE FOR drug_seq ,@name, @cost)";

                SqlCommand cmd = new SqlCommand(query, conn);

                cmd.Parameters.AddWithValue("@name", drug.name);
                cmd.Parameters.AddWithValue("@cost", drug.cost);

                conn.Open();
                int rows = cmd.ExecuteNonQuery();

                if (rows > 0)
                {
                    isSuccess = true;
                }
                else
                {
                    isSuccess = false;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
                //CustomMessageBox cm = new CustomMessageBox("Failed to add drug", form);
                //cm.Show();
            }
            finally
            {
                conn.Close();
            }
            return(isSuccess);
        }