private void DataProvider_OnUpdateCompleted(object sender, EventArgs e)
        {
            if (!dataProvider.IsUpdateSuccessfull)
            {
                pageChairsRoot.ShowErrorPage();
                return;
            }

            if (isChairPagesCreationCompleted)
            {
                return;
            }

            Logging.ToLog("MainWindow - Создание страниц для кресел");
            if (dataProvider.ChairsDict.Count == 0)
            {
                Logging.ToLog("MainWindow - Отсутствует информация о креслах");
                pageChairsRoot.SetupTitle("Кабинет не выбран");
                return;
            }
            else
            {
                foreach (DataProvider.ItemChair itemChair in dataProvider.ChairsDict.Values)
                {
                    PageChair pageChair = new PageChair(itemChair.ChID, itemChair.RNum, isLiveQueue, dataProvider);

                    Border border = PageChairsRoot.CreateIndicator();
                    if (dataProvider.ChairsDict.Count > 1)
                    {
                        pageChairsRoot.StackPanelPageIndicator.Children.Add(border);
                    }

                    chairPages.Add(pageChair, border);
                }

                if (chairPages.Count > 1)
                {
                    StartChairSwitch();
                }

                NavigateToPage();
            }

            isChairPagesCreationCompleted = true;
        }
        private void NavigateToPage()
        {
            PageChair pageToShow = chairPages.Keys.ToList()[currentPageIndex];

            chairPages[pageToShow].Background = Brushes.Gray;
            chairPages[pageToShow].Height     = 10;

            if (chairPages.Keys.Where(x => x.IsReceptionConducted).Count() > 0 &&
                !pageToShow.IsReceptionConducted)
            {
                TimerChangePage_Tick(null, null);
                return;
            }

            if (pageChairsRoot.FrameMain.Content == pageToShow)
            {
                return;
            }

            Logging.ToLog("MainWindow - Новое значение: " + pageToShow.ToString());
            pageChairsRoot.SetupTitle("Кабинет " + pageToShow.RNum);
            pageChairsRoot.FrameMain.Navigate(pageToShow);
        }