Medication.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Task3
{

    public partial class Medication : Form
    {
        public Medication()
        {
            InitializeComponent();
        }

        private void btnExit_Click(object sender, EventArgs e) //Exit button
        {
            Application.Exit();
        }

        private void btnPrevious_Click(object sender, EventArgs e) //Previous button
        {
            Form Start = new ClientData();
            this.Hide();
            Start.Show();
        }

        private void btnNextForm3_Click(object sender, EventArgs e)
        {
            Form Start = new Procedures();
            this.Hide();
            Start.Show();
        }

        int nudAntibiotic7OldValue;
        int nudAntibiotic14OldValue;
        int nudFleeAndMiteOldValue;
        int nudHeartwormOldValue;
        int nudAnesGasto30mOldValue;
        int nudAnesgasafter20mOldValue;
        int nudFentanylOldValue;
        int nudFrontlineOldValue;
        int nudAnalgesiaOldValue;
        int nudBaytrillOldValue;
        int nudMetronidazoleOldValue;
        int nudRimadylOldValue;
        int nudDrontalSmalldogOldValue;
        int nudDrontalLargedogOldValue;
        int nudCanineRabiesOldValue;

        private decimal Calculate(int count, string nudName)
        {
            decimal price;
            decimal result = 0;

            switch (nudName)
            {
                case "nudAntibiotic":
                    count -= nudAntibiotic7OldValue;
                    price = 19.60m;
                    result = price * count;
                    break;

                //...add other cases for different medicine

                default:
                    break;
            }

            return result;
        }


        private void UpdownAntibiotic7_ValueChanged(object sender, EventArgs e)
        {
            if (String.IsNullOrEmpty(priceTotal.Text))
                priceTotal.Text = (Calculate(Convert.ToInt32(UpdownAntibiotic7.Value), UpdownAntibiotic7.Name)).ToString();
            else
                priceTotal.Text = (decimal.Parse(priceTotal.Text.Replace(' ', '0').Replace('€', '0').Replace('$', '0').Replace('£', '0')) + Calculate(Convert.ToInt32(UpdownAntibiotic7.Value), UpdownAntibiotic7.Name)).ToString("C");

            nudAntibiotic7OldValue = Convert.ToInt32(UpdownAntibiotic7.Value);
        }

        private void UpdownAntibiotic14_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpdownFleeAndMite_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpdownHeartworm_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpdownAnesGasTo30min_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpdownAnesGasAfter30min_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpdownFentanyl_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpdownFrontline_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpDownAnalgesia_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpDownBaytrill_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpDownMetronidazole_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpDownRimadyl_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpDownDrontalSmall_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpDownDrontalLarge_ValueChanged(object sender, EventArgs e)
        {

        }

        private void UpDownCanineRabies_ValueChanged(object sender, EventArgs e)
        {

        }

        private void lblTotalAmountForm2_Click(object sender, EventArgs e)
        {

        }

        private void btnCalc_Click(object sender, EventArgs e)
        {
            float amount1 = (float)UpdownAntibiotic14.Value;
            double cost1 = amount1 * 10;
            float amount2 = (float)UpdownAntibiotic7.Value; /* copy and paste */
            double cost2 = amount2 * 10;

            double ExcTotal = cost1 + cost2; /* add cost here */
            priceTotal.Text = ExcTotal.ToString();
        }

        private void Medication_Load(object sender, EventArgs e)
        {

        }
    }
}