AddMedicine.cs

using System;
using System.Collections;
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;
using Pharmacy_Management_Sysytem.BusinessLogic;
using Pharmacy_Management_Sysytem.Models;
using Pharmacy_Management_Sysytem.Services;

namespace Pharmacy_Management_Sysytem
{
    public partial class AddMedicine : UserControl
    {
        private readonly IMedicineService _medicineService;

        public AddMedicine()
        {
            InitializeComponent();
            _medicineService = Program.Services.MedicineService;
        }
        void addMedicineToDataBase()
        {
            if (txtBoxMedicineID.Text == "" || txtBoxMedicineName.Text == "" || txtBoxMedicineNumber.Text == "" || dtbDateOfManufature.Text == "" || dtbExpirationDate.Text == "" || txtBoxQuantity.Text == "" || txtBoxPricePerUnit.Text == "")
            {
                MessageBox.Show("Enter Correct Information", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            String MedicineID = txtBoxMedicineID.Text;
            String MedicineName = txtBoxMedicineName.Text;
            String MedicineNumber = txtBoxMedicineNumber.Text;
            DateTime ManufactureDate = DateTime.Parse(dtbDateOfManufature.Text);
            DateTime ExpirationDate = DateTime.Parse(dtbExpirationDate.Text);
            int Quantity = Convert.ToInt32(txtBoxQuantity.Text);
            decimal PricePerUnit = Convert.ToDecimal(txtBoxPricePerUnit.Text);
            
            var medicine = new Medicine(MedicineID, MedicineName, MedicineNumber, ManufactureDate, ExpirationDate, Quantity, PricePerUnit);
            var result = _medicineService.CreateMedicine(medicine);
            
            if (result.IsSuccess)
            {
                MessageBox.Show("Medicine Added Successfully.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
                clearAll();
            }
            else
            {
                MessageBox.Show(result.ErrorMessage ?? "Medicine already existed.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        void clearAll()
        {
            txtBoxMedicineID.Clear();
            txtBoxMedicineName.Clear();
            txtBoxMedicineNumber.Clear();
            dtbDateOfManufature.ResetText();
            dtbExpirationDate.ResetText();
            txtBoxQuantity.Clear();
            txtBoxPricePerUnit.Clear();
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            addMedicineToDataBase();
        }

        private void btnReset_Click(object sender, EventArgs e)
        {
            clearAll();
        }
    }
}