Diplom_B/IzdForm.cs

using Diplom_B.DB;
using System;
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;

namespace Diplom_B
{
	public partial class IzdForm : Form
	{
		public IzdForm()
		{
			InitializeComponent();
			errorLable.Visible = false;
			idLable.Text = "";
			try
			{
				using (var db = new MainDB()){
					var res = WorkDB.ListIzdelie();
					UpdateTable(res);
				}
			}
			catch
			{
				ShowError();
			}
		}


		private void createButton_Click(object sender, EventArgs e)
		{
			try
			{
				if (!double.TryParse(cenaBox.Text, out double cena))
				{
					ShowError("Ошибка цены.");
					return;
				}
				if (!int.TryParse(otdRazBox.Text, out int otdRaz))
				{
					ShowError("Ошибка отдела-разработчика.");
					return;
				}
				{
					var r = new Izdelie()
					{
						Name = nameBox.Text,
						DecNum = decBox.Text,
						Shifr = shifrBox.Text,
						Litera = literaBox.Text,
						Cena = cena,
						OtdelRazrab = otdRaz,
						Ved = vedBox.Text,
						GlavKonstr = glavKonstrBox.Text
					};
					WorkDB.AddIzdelie(r);
					UpdateTable(WorkDB.ListIzdelie());
				}
			}
			catch (Exception ex)
			{
				ShowError(ex.Message);
			}
		}


		private void UpdateTable(Izdelie[] arr)
		{
			{
				var r = dataGridView1.Rows;
				while (r.Count > 0)
					r.Remove(r[0]);
				var c = dataGridView1.Columns;
				while (c.Count > 0)
					c.Remove(c[0]);
			}
			{
				var c = dataGridView1.Columns;
				c.Add("Id", "№");
				c["Id"].Width = 40;
				c.Add("Name", "Наим.");
				c["Name"].Width = 60;
				c.Add("DecNum", "Дец. №");
				c["DecNum"].Width = 120;
				c.Add("Shifr", "Шифр");
				c["Shifr"].Width = 80;
				c.Add("Litera", "Литера");
				c["Litera"].Width = 50;
				c.Add("Cena", "Цена");
				c["Cena"].Width = 70;
				c.Add("OtdelRazrab", "Отдел");
				c["OtdelRazrab"].Width = 40;
				c.Add("Ved", "Вед.");
				c.Add("GlavKonstr", "Глав. констр.");
			}
			{
				var r = dataGridView1.Rows;
				foreach(var izd in arr)
					r.Add(new object[] {
						izd.Id,
						izd.Name,
						izd.DecNum,
						izd.Shifr,
						izd.Litera,
						izd.Cena.ToString("F2") + " Р",
						izd.OtdelRazrab,
						izd.Ved,
						izd.GlavKonstr
					});
			}
			if (dataGridView1.Rows.Count > 0)
				dataGridView1.Rows[0].Selected = true;
			dataGridView1_CurrentCellChanged(this, new EventArgs());
		}

		private Task errDrop;
		private void ShowError(string msg = null)
		{
			errorLable.Text = string.IsNullOrEmpty(msg) ? "Неизвестная ошибка." : msg;
			errorLable.Visible = true;
			errDrop = new Task(() =>
			{
				var fd = errDrop.Id;
				Task.Delay(5000).Wait();
				if (errDrop.Id == fd)
					if (InvokeRequired) Invoke((Action)(() => { errorLable.Visible = false; }));
					else errorLable.Visible = false;
			});
			errDrop.Start();
		}

    private void dataGridView1_CurrentCellChanged(object sender, EventArgs e)
    {
			ClearBoxes();
			if (dataGridView1.SelectedRows.Count != 1)
				return;
      {
				var izd = WorkDB.GetIzdelie((int)dataGridView1.SelectedRows[0].Cells[0].Value);
				if (izd == null)
					return;
				idLable.Text = izd.Id.ToString();
				nameBox.Text = izd.Name;
				decBox.Text = izd.DecNum;
				shifrBox.Text = izd.Shifr;
				literaBox.Text = izd.Litera;
				cenaBox.Text = izd.Cena.ToString();
				otdRazBox.Text = izd.OtdelRazrab.ToString();
				vedBox.Text = izd.Ved;
				glavKonstrBox.Text = izd.GlavKonstr;
			}
		}

    private void clearButton_Click(object sender, EventArgs e)
    {
			ClearBoxes();
    }
		private void ClearBoxes()
    {
			idLable.Text = "";
			nameBox.Text = "";
			decBox.Text = "";
			shifrBox.Text = "";
			literaBox.Text = "";
			cenaBox.Text = "";
			otdRazBox.Text = "";
			vedBox.Text = "";
			glavKonstrBox.Text = "";
		}

		private Task filterDrop;
    private void searchBox_TextChanged(object sender, EventArgs e)
    {
			filterDrop = new Task(() =>
			{
				var fd = filterDrop.Id;
				Task.Delay(1000).Wait();
				if (filterDrop.Id == fd)
					if (InvokeRequired) Invoke((Action)(() => { UpdateTable(WorkDB.ListIzdelie(searchBox.Text)); }));
					else UpdateTable(WorkDB.ListIzdelie(searchBox.Text));

			});
			filterDrop.Start();
    }

    private void resetSearchButton_Click(object sender, EventArgs e)
    {
			searchBox.Text = "";
			filterDrop = new Task(() => { return; });
			UpdateTable(WorkDB.ListIzdelie());
		}
	}
}