private void ToRent(object sender, RoutedEventArgs e)
        {
            pavilions_class row = (pavilions_class)grid.SelectedItem;

            if (row != null)
            {
                string id_selected_pavilion = row.id_pavilion;
                this.Visibility = Visibility.Hidden;
                new Rentors(connection, this, selected_id_shop_center, id_selected_pavilion, id_employee);
            }
        }
        public ShowPavilions(SqlConnection connection, Window parent, string selected_id_shop_center, string id_employee)
        {
            InitializeComponent();
            this.Show();
            parent.Visibility            = Visibility.Hidden;
            this.connection              = connection;
            this.parent                  = parent;
            this.selected_id_shop_center = selected_id_shop_center;
            this.id_employee             = id_employee;
            string sqlExpression = "SELECT * FROM ShowPavilions WHERE shop_center_id = " + selected_id_shop_center + "";
            List <pavilions_class> pavilions_list = new List <pavilions_class>();

            try
            {
                SqlCommand    command = new SqlCommand(sqlExpression, connection);
                SqlDataReader reader  = command.ExecuteReader();
                if (reader.HasRows)
                {
                    while (reader.Read())
                    {
                        pavilions_class st_rec = new pavilions_class();

                        st_rec.id_shop_center  = reader.GetValue(0).ToString();
                        st_rec.id_pavilion     = reader.GetValue(1).ToString();
                        st_rec.name_center     = reader.GetValue(2).ToString();
                        st_rec.floor           = reader.GetValue(3).ToString();
                        st_rec.status          = reader.GetValue(4).ToString();
                        st_rec.area            = reader.GetValue(5).ToString();
                        st_rec.price           = reader.GetValue(6).ToString();
                        st_rec.var_coefficient = reader.GetValue(7).ToString();


                        pavilions_list.Add(st_rec);
                    }

                    reader.Close();
                    grid.ItemsSource = pavilions_list;

                    grid.Columns[0].Visibility = Visibility.Hidden;
                    grid.Columns[1].Header     = "No-Павильона";
                    grid.Columns[2].Header     = "Торговый центр";
                    grid.Columns[3].Header     = "Этаж";
                    grid.Columns[4].Header     = "Статус";
                    grid.Columns[5].Header     = "Площадь кв.м";
                    grid.Columns[6].Header     = "Цена (кв.м/руб.)";
                    grid.Columns[7].Header     = "Коэффициент";
                }

                else
                {
                    reader.Close();
                    grid.ItemsSource = null;
                }
            }

            catch (SqlException e)
            {
                MessageBox.Show("Произошла ошибка: " + e.Number + "." + e.Message);
                this.Close();
            }
        }