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

using GasStation.Repositories;
using Unity;

namespace GasStation.Forms
{
    public partial class FormSupplies : Form
    {
        private readonly IUnityContainer _container;

        private readonly ISupplyRepository _supplyRepository;

        public FormSupplies(IUnityContainer container, ISupplyRepository supplyRepository)
        {
            InitializeComponent();
            _container = container ??
                throw new ArgumentNullException(nameof(container));
            _supplyRepository = supplyRepository ??
                throw new ArgumentNullException(nameof(supplyRepository));
        }

        private void ButtonAdd_Click(object sender, EventArgs e)
        {
            try
            {
                _container.Resolve<FormSupply>().ShowDialog();
                LoadList();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка при добавлении", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void ButtonDel_Click(object sender, EventArgs e)
        {
            if (!TryGetIDFromSelectedRow(out var findID))
            {
                return;
            }

            if (MessageBox.Show("Удалить запись?", "Удаление", MessageBoxButtons.YesNo) != DialogResult.Yes)
            {
                return;
            }

            try
            {
                _supplyRepository.DeleteSupply(findID);
                LoadList();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка удаления", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void LoadList() => dataGridViewData.DataSource = _supplyRepository.ReadSupply();

        private void FormSupplies_Load(object sender, EventArgs e)
        {
            try
            {
                LoadList();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка при загрузке", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private bool TryGetIDFromSelectedRow(out int id)
        {
            id = 0;
            if (dataGridViewData.SelectedRows.Count < 1)
            {
                MessageBox.Show("Нет выбранной записи", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return false;
            }

            id = Convert.ToInt32(dataGridViewData.SelectedRows[0].Cells["ID"].Value);
            return true;
        }
    }
}