private void LoadCities()
{
IsBusy = true;
try
{
Cities = new ObservableCollection <City>(_resourceDataService.GetCities());
} finally
{
IsBusy = false;
}
}
private async Task GetFavoriteCitiesAndWeather()
{
var allCities = _resourceDataService.GetCities();
var favoriteKeys = await _favoriteCityService.GetFavoriteCitiesAsync();
IsBusy = true;
if (favoriteKeys.Any())
{
NofavoriteCities = false;
var favoriteCities = allCities.Where(c => favoriteKeys.Select(f => f.Key).Contains(c.Id));
var tasks = new List <Task>();
foreach (var item in favoriteCities)
{
tasks.Add(Task.Run(async() => item.Weather = await _restService.GetWeather(item.Id)));
}
var continuation = Task.WhenAll(tasks);
try
{
continuation.Wait();
Cities = new ObservableCollection <City>(favoriteCities);
} catch (Exception)
{
await _pageDialogService.DisplayAlertAsync(Message.MessageText, Message.FetchWeatherDataFailed, Message.Ok);
} finally
{
IsBusy = false;
}
}
else
{
NofavoriteCities = true;
}
}