private void HotSearchListView_ItemClick(object sender, ItemClickEventArgs e)
        {
            var    hot = e.ClickedItem as HotSearch;
            string key = hot.keyword;

            App.AppViewModel.NavigateToSubPage(typeof(Pages_Share.Sub.SearchPage), key);
            HotSearchFlyout.Hide();
        }
 private void HotSearchButton_Click(object sender, RoutedEventArgs e)
 {
     HotSearchFlyout.ShowAt(BiliSearchBox);
 }