ISEbd-22_Rozhkov.I.E._Simple/GasStation/Forms/FormSupply.cs

using GasStation.Repositories;
using GasStation.Entities;

namespace GasStation.Forms
{
    public partial class FormSupply : Form
    {
        private readonly ISupplyRepository _supplyRepository;

        public FormSupply(ISupplyRepository supplyRepository, ISupplierRepository supplierRepository, IProductRepository productRepository)
        {
            InitializeComponent();
            _supplyRepository = supplyRepository ??
                throw new ArgumentNullException(nameof(supplyRepository));

            comboBoxSupplier.DataSource = supplierRepository.ReadSupplier();
            comboBoxSupplier.DisplayMember = "SupplierName";
            comboBoxSupplier.ValueMember = "ID";

            comboBoxProduct.DataSource = productRepository.ReadProduct();
            comboBoxProduct.DisplayMember = "FullName";
            comboBoxProduct.ValueMember = "ID";
        }

        private void ButtonSave_Click(object sender, EventArgs e)
        {
            try
            {
                if (comboBoxProduct.SelectedIndex < 0 ||
                    comboBoxSupplier.SelectedIndex < 0)
                {
                    throw new Exception("Имеются незаполненые поля");
                }

                _supplyRepository.CreateSupply(Supply.CreateSupply(0, (int)comboBoxSupplier.SelectedValue!, 
                    (int)comboBoxProduct.SelectedValue!, Convert.ToInt32(numericUpDownCount.Value)));

                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка при сохранении", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
        }

        private void ButtonCancel_Click(object sender, EventArgs e) => Close();

    }
}