/// <summary>
/// Updates the weather data asynchronously.
/// </summary>
public async void UpdateWeatherDataAsync()
{
try
{
imgLoading.Visibility = Visibility.Visible;
// Clear the current data, call and await OpenWeatherMap API to return data
// and cache the data
// and update the last update time.
allWeatherData.Clear();
await OpenWeatherMapFacade.GetWeatherDataAsync(SelectedCity, allWeatherData, ApiKey);
OpenWeatherMapFacade.SaveWeatherDataToFileCache(SelectedCity, allWeatherData);
OpenWeatherMapFacade.SaveLastUpdatedTime();
SetCurrentWeatherData();
imgLoading.Visibility = Visibility.Hidden;
}
catch (Exception e)
{
MessageBox.Show($"Error Occurred:\n{e.Message}\n\nStack:\n{e.StackTrace}",
"Error",
MessageBoxButton.OK,
MessageBoxImage.Error);
}
finally
{
imgLoading.Visibility = Visibility.Hidden;
}
}
/// <summary>
/// Application main window.
/// </summary>
public MainWindow()
{
InitializeComponent();
GetApiKey();
// Initialize timer for weather updates. Weather data is updated automatically
// every 12m 20sec, otherwise a cache is used. This is to avoid excessive calls
// OpenWeatherMap API.
UpdateTimer = new DispatcherTimer();
UpdateTimer.Tick += new EventHandler(UpdateTimer_Tick);
UpdateTimer.Interval = new TimeSpan(0, 12, 20);
UpdateTimer.Start();
// Initialize collections
allWeatherData = new ObservableCollection <WeatherCheck.Models.List>();
currentWeatherData = new ObservableCollection <WeatherCheck.Models.List>();
cityList = new List <string>();
// Keeps track of time elapsed since the last API -call
LastUpdatedTime = OpenWeatherMapFacade.GetLastUpdatedTime();
// Load the list of Finland cities/towns
// and get currently selected city.
LoadCityList();
GetSelectedCity();
if (!String.IsNullOrEmpty(SelectedCity))
{
if (IsWeatherUpdateAllowed())
{
UpdateWeatherDataAsync();
}
else
{
OpenWeatherMapFacade.LoadWeatherDataFromFileCache(SelectedCity, allWeatherData);
SetCurrentWeatherData();
}
}
// Initialize databindings
icCurrentWeatherData.ItemsSource = currentWeatherData;
icWeatherData.ItemsSource = allWeatherData;
tbSelectedCityName.Text = SelectedCity;
}
