Diplom_B/DB/WorkDB.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Diplom_B.DB
{
	public static class WorkDB
	{
		public static void Init()
		{
			using (var DB = new MainDB())
			{
				var usr = (from u in DB.Users
									 where u.Name == "admin"
									 select u).ToArray();
				if (usr.Length < 1)
				{
					DB.Users.Add(new DB.User()
					{
						Name = "admin",
						Pass = "admin"
					});
				}
				DB.SaveChanges();
			}
		}
		public static Izdelie[] ListIzdelie(string filter = "")
		{
			var f = filter.ToLower();
			try
			{
				using (var db = new MainDB())
				{
					if (string.IsNullOrEmpty(filter))
					{
						var tmp = (from a in db.Izdeliya
											 select a).ToArray();
						return tmp;
					}
					else
					{
						var tmp = (from a in db.Izdeliya
											 where
												 a.Id.ToString().ToLower().Contains(f) ||
												 a.Name.ToLower().Contains(f) ||
												 a.DecNum.ToLower().Contains(f) ||
												 a.Shifr.ToLower().Contains(f) ||
												 a.Litera.ToLower().Contains(f) ||
												 a.Cena.ToString("F2").ToLower().Contains(f) ||
												 a.OtdelRazrab.ToString().ToLower().Contains(f) ||
												 a.Ved.ToLower().Contains(f) ||
												 a.GlavKonstr.ToLower().Contains(f)
											 select a).ToArray();
						return tmp;
					}
				}
			}
			catch { throw; }
		}
		public static Izdelie GetIzdelie(int id)
		{
			try
			{
				using (var db = new MainDB())
				{
					var res = (from a in db.Izdeliya
										 where a.Id == id
										 select a).ToArray();
					if (res.Length != 1)
						return null;
					else
						return res[0];
				}
			}
			catch { throw; }
		}
		public static void AddIzdelie(Izdelie izd)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Izdeliya.Add(izd);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}
		public static void ChangeIzdelie(Izdelie izd)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Izdeliya.Update(izd);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}
		public static void DeleteIzdelie(Izdelie izd)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Izdeliya.Remove(izd);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}

		public static Izveschenie[] ListIzveschenie(string filter = "")
		{
			var f = filter.ToLower();
			try
			{
				using (var db = new MainDB())
				{
					if (string.IsNullOrEmpty(filter))
					{
						var tmp = (from a in db.Izvescheniya
											 select a).ToArray();
						return tmp;
					}
					else
					{
						var tmp = (from a in db.Izvescheniya
											 where
											   a.Id.ToString().ToLower().Contains(f) ||
												 a.IzvNum.ToLower().Contains(f) ||
												 a.InvNum.ToString().ToLower().Contains(f) ||
												 a.IzmNum.ToString().ToLower().Contains(f) ||
												 a.UkazZad.ToLower().Contains(f) ||
												 a.UkazVnedr.ToLower().Contains(f) ||
												 a.FileName.ToLower().Contains(f)
											 select a).ToArray();
						return tmp;
					}
				}
			}
			catch { throw; }

		}
		public static Izveschenie GetIzveschenie(int id)
		{
			try
			{
				using (var db = new MainDB())
				{
					var res = (from a in db.Izvescheniya
										 where a.Id == id
										 select a).ToArray();
					if (res.Length != 1)
						return null;
					else
						return res[0];
				}
			}
			catch { throw; }
		}
		public static void AddIzveschenie(Izveschenie izv)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Izvescheniya.Add(izv);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}
		public static void ChangeIzveschenie(Izveschenie izv)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Izvescheniya.Update(izv);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}
		public static void DeleteIzdelie(Izveschenie izv)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Izvescheniya.Remove(izv);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}

		public static Zakazchik[] ListZakazchik(string filter = "")
		{
			var f = filter.ToLower();
			try
			{
				using (var db = new MainDB())
				{
					if (string.IsNullOrEmpty(filter))
					{
						var tmp = (from a in db.Zakazchiki
											 select a).ToArray();
						return tmp;
					}
					else
					{
						var tmp = (from a in db.Zakazchiki
											 where
												 a.Id.ToString().ToLower().Contains(f) ||
												 a.Name.ToLower().Contains(f) ||
												 a.Adress.ToLower().Contains(f) ||
												 a.Phone.ToLower().Contains(f) ||
												 a.Email.ToLower().Contains(f)
											 select a).ToArray();
						return tmp;
					}
				}
			}
			catch { throw; }

		}
		public static Zakazchik GetZakazchik(int id)
		{
			try
			{
				using (var db = new MainDB())
				{
					var res = (from a in db.Zakazchiki
										 where a.Id == id
										 select a).ToArray();
					if (res.Length != 1)
						return null;
					else
						return res[0];
				}
			}
			catch { throw; }
		}
		public static void AddZakazchik(Zakazchik zak)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Zakazchiki.Add(zak);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}
		public static void ChangeZakazchik(Zakazchik zak)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Zakazchiki.Update(zak);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}
		public static void DeleteZakazchik(Zakazchik zak)
		{
			try
			{
				using (var db = new MainDB())
				{
					db.Zakazchiki.Remove(zak);
					db.SaveChanges();
				}
			}
			catch { throw; }
		}


	}
}