Diplom_O/MainForms/ShtatForm.cs

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;
using Diplom_O.DataBase;

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

		private Task filterDrop;
		private void findBox_TextChanged(object sender, EventArgs e)
		{
			filterDrop = new Task(() =>
			{
				var fd = filterDrop.Id;
				Task.Delay(1000).Wait();
				if (filterDrop.Id == fd)
					if (InvokeRequired) Invoke((Action)(() => { resetShatTable(); }));
					else resetShatTable();
			});
			filterDrop.Start();
		}
		private void dropFindButton_Click(object sender, EventArgs e)
		{
			findBox.Text = "";
			filterDrop = new Task(() => { return; });
			resetShatTable();
		}

		private void resetShatTable()
		{
			try
			{
				{
					shtatGridView.Rows.Clear();
					shtatGridView.Columns.Clear();
					var c = shtatGridView.Columns;
					c.Add("Id", "№");
					c.Add("Dolj", "Должность");
					c.Add("Kolvo", "Кол-во");
					c.Add("Free", "Своб.");
					c[0].Width = 40;
					c[1].Width = 120;
					c[2].Width = 40;
					c[3].Width = 40;
				}
				{
					var arr = FuncDB.ListShtat(findBox.Text);
					var r = shtatGridView.Rows;
					foreach (var shtat in arr)
						if (shtat.ost != 0)
							r.Add(new object[] {
								shtat.shtat.Id,
								shtat.shtat.Doljnost,
								shtat.shtat.Size,
								shtat.ost
							});
				}
				if (shtatGridView.Rows.Count > 0)
					shtatGridView.Rows[0].Selected = true;
			}
			catch (Exception e) { ShowError(e.Message); }
		}
		private Shtat selectedShtat()
		{
			try
			{
				if (shtatGridView.SelectedRows.Count != 1) throw new Exception("Должность не выбрана.");
				var shtat = FuncDB.GetShtat((int)shtatGridView.SelectedRows[0].Cells[0].Value);
				return shtat;
			}
			catch (Exception e) { ShowError(e.Message); return null; }
		}

		public Shtat formResult = null;
		public ShtatForm(bool select = false)
		{
			try
			{
				InitializeComponent();
				Init(select);
				resetShatTable();
			}
			catch { this.Close(); }
		}
		public void Init(bool s)
		{
			if (s) selectButton.Visible = true;
			shtatMI.Enabled = false;
		}

		private void addButton_Click(object sender, EventArgs e)
		{
			var res = new SupportForms.WorkShtatForm();
			res.ShowDialog();
			if (!res.isCanceled)
				resetShatTable();
		}
		private void changeButton_Click(object sender, EventArgs e)
		{
			var shtat = selectedShtat();
			if (shtat == null) { ShowError("Должность не выбрана."); return; }
			var res = new SupportForms.WorkShtatForm(shtat);
			res.ShowDialog();
			if (!res.isCanceled)
				resetShatTable();
		}
		private void delButton_Click(object sender, EventArgs e)
		{
			var shtat = selectedShtat();
			if (shtat == null) { ShowError("Должность не выбрана."); return; }
			try
			{
				FuncDB.DelShtat(shtat);
				resetShatTable();
			}
			catch (Exception ex) { ShowError(ex.Message); }
		}
		public void MI_Click(object sender, EventArgs e)
		{
			object form = null;
			var idxMenu = -1;
			try { idxMenu = menuStrip.Items.IndexOf((ToolStripMenuItem)sender); }
			catch { };
			switch (idxMenu)
			{
				case 0: form = new ShtatForm(); break;
				case 1: form = new RabForm(); break;
				case 2: form = new OtpForm(); break;
				case 3: form = new ChelForm(); break;
			}
			if (form != null)
			{
				this.Hide();
				((Form)form).Closed += (s, args) => this.Close();
				((Form)form).Show();
				return;
			}
			ShowError("Ошибка перехода на новую форму.");
		}

		private void freeShtatCheckBox_CheckedChanged(object sender, EventArgs e)
		{
			resetShatTable();
		}
	}
}