private void Add_DoanVien_Click(object sender, RoutedEventArgs e)
        {
            Add = true;

            Add_DoanVien.IsEnabled = false;
            Mod_DoanVien.IsEnabled = false;

            SQLiteConnection sqlite_conn = new SQLiteConnection("Data source = QuanLyDoanVien.db");
            SQLiteCommand    sqlite_com  = new SQLiteCommand();

            sqlite_conn.Open();
            sqlite_com = sqlite_conn.CreateCommand();

            sqlite_com.CommandText = "SELECT Max(ID) FROM DoanVien";
            MaDoanVien.Text        = (Convert.ToInt32(sqlite_com.ExecuteScalar()) + 1).ToString();



            HoVaTen.IsEnabled                   = NgaySinh.IsEnabled = QueQuan.IsEnabled =
                GioiTinh.IsEnabled              = ChiDoan.IsEnabled = ChucVu.IsEnabled = ToDanPho.IsEnabled =
                    PhuongXa.IsEnabled          = QuanHuyen.IsEnabled = TinhThanh.IsEnabled = NgayVaoDang.IsEnabled =
                        NgayVaoDoan.IsEnabled   = TinhTrang.IsEnabled = CMND.IsEnabled = Email.IsEnabled =
                            DienThoai.IsEnabled = DanToc.IsEnabled = TonGiao.IsEnabled = HoanCanh.IsEnabled = TrinhDo.IsEnabled
                                                                                                                  = true;

            HoVaTen.Clear();
            NgaySinh.Clear(); QueQuan.Clear();
            GioiTinh.Clear(); ChiDoan.Clear(); ChucVu.Clear(); ToDanPho.Clear();
            PhuongXa.Clear(); QuanHuyen.Clear(); TinhThanh.Clear(); NgayVaoDang.Clear();
            NgayVaoDoan.Clear(); TinhTrang.Clear(); CMND.Clear(); Email.Clear();
            DienThoai.Clear(); DanToc.Clear(); TonGiao.Clear(); HoanCanh.Clear(); TrinhDo.Clear();
        }
        public bool AddHometown(QueViewModel model)
        {
            QueQuan queQuan = new QueQuan()
            {
                MaQue     = model.MaQue,
                TenQue    = model.TenQue,
                TrangThai = Convert.ToBoolean(model.TrangThai)
            };

            db.QueQuans.Add(queQuan);
            db.SaveChanges();
            return(true);
        }