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

using GasStation.Entities;
using GasStation.Repositories;

namespace GasStation.Forms
{
    public partial class FormSupplier : Form
    {
        private readonly ISupplierRepository _suppliarRepository;

        private int? _supplierId;

        public int ID
        {
            set
            {
                try
                {
                    var supplier = _suppliarRepository.ReadSupplierByID(value);
                    if (supplier == null)
                    {
                        throw new InvalidDataException(nameof(supplier));
                    }

                    comboBoxSupplierName.DataSource = supplier.ProductName;
                    _supplierId = value;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "Ошибка при получении данных", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }
        }

        public FormSupplier(ISupplierRepository supplierRepository)
        {
            InitializeComponent();
            _suppliarRepository = supplierRepository ??
                throw new ArgumentNullException(nameof(supplierRepository));
        }

        private void ButtonSave_Click(object sender, EventArgs e)
        {
            try
            {
                if (comboBoxSupplierName.SelectedIndex < 1)
                {
                    throw new Exception("Имеются незаполненые поля");
                }
                if (_supplierId.HasValue)
                {
                    _suppliarRepository.UpdateSupplier(CreateSupplier(_supplierId.Value));
                }
                else
                {
                    _suppliarRepository.CreateSupplier(CreateSupplier(0));
                }
                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка при сохранении", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
        }

        private Supplier CreateSupplier(int id) => Supplier.CreateSupplier(id, comboBoxSupplierName.Text);

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