DB/TransportGuide/FormStopRoute.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using TransportGuideContracts.ViewModels;
using TransportGuideDataModels.Models;
using TransportGuideContracts.BusinessLogicsContracts;

namespace TransportGuide
{
	public partial class FormStopRoute : Form
	{
		private readonly List<StopViewModel>? _list;
		public int Id
		{
			get
			{
				return Convert.ToInt32(comboBoxStop.SelectedValue);
			}
			set
			{
				comboBoxStop.SelectedValue = value;
			}
		}
		public IStopModel? StopModel
		{
			get
			{
				if (_list == null)
				{
					return null;
				}
				foreach (var elem in _list)
				{
					if (elem.Id == Id)
					{
						return elem;
					}
				}
				return null;
			}
		}
		public int Nomer
		{
			get { return Convert.ToInt32(textBoxNomer.Text); }
			set { textBoxNomer.Text = value.ToString(); }
		}

		public FormStopRoute(IStopLogic logic)
		{
			InitializeComponent();
			_list = logic.ReadList(null);
			if (_list != null)
			{
				comboBoxStop.DisplayMember = "Name";
				comboBoxStop.ValueMember = "Id";
				comboBoxStop.DataSource = _list;
				comboBoxStop.SelectedItem = null;
			}
		}

		private void buttonSave_Click(object sender, EventArgs e)
		{
			if (string.IsNullOrEmpty(textBoxNomer.Text))
			{
				MessageBox.Show("Fill in Nomer", "Ошибка",
			   MessageBoxButtons.OK, MessageBoxIcon.Error);
				return;
			}
			if (comboBoxStop.SelectedValue == null)
			{
				MessageBox.Show("Choose Stop", "Ошибка",
			   MessageBoxButtons.OK, MessageBoxIcon.Error);
				return;
			}
			DialogResult = DialogResult.OK;
			Close();

		}

		private void buttonCancel_Click(object sender, EventArgs e)
		{
			DialogResult = DialogResult.Cancel;
			Close();
		}
	}
}