// Declare a private variable to store application state.
private WeatherData _remoteWeatherData;
- // Declare an event for when the application data changes.
- public event EventHandler ApplicationDataObjectChanged;
-
// Declare a public property to access the application data variable.
public WeatherData ApplicationDataObject
{
if (value != _remoteWeatherData)
{
_remoteWeatherData = value;
- OnApplicationDataObjectChanged(EventArgs.Empty);
}
}
}
- // Create a method to raise the ApplicationDataObjectChanged event.
- protected void OnApplicationDataObjectChanged(EventArgs e)
- {
- EventHandler handler = ApplicationDataObjectChanged;
- if (handler != null)
- {
- handler(this, e);
- }
- }
-
/// <summary>
/// Proporcionar acceso sencillo al marco raíz de la aplicación telefónica.
/// </summary>
{
private MainViewModel _mainViewModel;
private bool _isNewPageInstance = false;
- // Data context for the local database
- private LocationDataContext _locationDB;
- private Location _locationItem;
// Constructor
public MainPage()
_isNewPageInstance = true;
- // Set the event handler for when the application data object changes.
- // TODO: doing this, when is the GC going to release this object? I do not think it is going to be able... This is weird...
- // Shouldn't I release this even handler when the MainPage is not used anymore. In my case is not a big problem because
- // the MainPage should be always active (it is the "mainpage") but if this was not the mainpage... Would the GC be able
- // to release this object when the page is not active... I DO NOT THINK SO...
- (Application.Current as WeatherInformation.App).ApplicationDataObjectChanged +=
- new EventHandler(MainPage_ApplicationDataObjectChanged);
-
- // Connect to the database and instantiate data context.
- _locationDB = new LocationDataContext(LocationDataContext.DBConnectionString);
-
// Código de ejemplo para traducir ApplicationBar
//BuildLocalizedApplicationBar();
}
// and it has remained in memory, this value will continue to be false.
_isNewPageInstance = false;
- _locationItem = _locationDB.Locations.Where(location => location.IsSelected).FirstOrDefault();
-
UpdateApplicationDataUI();
}
- protected override void OnNavigatedFrom(System.Windows.Navigation.NavigationEventArgs e)
+ async private void UpdateApplicationDataUI()
{
- // Call the base method.
- base.OnNavigatedFrom(e);
-
- // Save changes to the database.
- // TODO: How does DataContext work? How does it know what data was modified? Is it wasting memory? :(
- _locationDB.SubmitChanges();
-
- // No calling _locationDB.Dispose? :/
- }
+ Location locationItem = null;
+ using (var db = new LocationDataContext(LocationDataContext.DBConnectionString))
+ {
+ locationItem = db.Locations.Where(location => location.IsSelected).FirstOrDefault();
+ }
- private void UpdateApplicationDataUI()
- {
- if (_locationItem == null)
+ if (locationItem == null)
{
// Nothing to do.
return;
// TODO: I am setting and getting ApplicationDataObject from different threads!!!! What if I do not see its last value? Do I need synchronization? :/
WeatherData weatherData = (Application.Current as WeatherInformation.App).ApplicationDataObject;
if (weatherData != null &&
- !_locationItem.IsNewLocation &&
+ !locationItem.IsNewLocation &&
// TODO: NO ESTOY USANDO GetIsolatedStoredData!!!!!! :(
(Application.Current as WeatherInformation.App).IsStoredDataFresh())
{
else
{
// Otherwise, call the method that loads data.
- GetDataAsync();
+ await GetDataAsync(locationItem);
+ // Call UpdateApplicationData on the UI thread.
+ Dispatcher.BeginInvoke(() => UpdateUI());
}
}
- // The event handler called when the ApplicationDataObject changes.
- void MainPage_ApplicationDataObjectChanged(object sender, EventArgs e)
- {
- // Call UpdateApplicationData on the UI thread.
- Dispatcher.BeginInvoke(() => UpdateUI());
- }
-
void UpdateUI()
{
// Set the ApplicationData and ApplicationDataStatus members of the ViewModel
_mainViewModel.LoadData(weatherData);
- _locationItem.IsNewLocation = false;
+ Location locationItem = null;
+ using (var db = new LocationDataContext(LocationDataContext.DBConnectionString))
+ {
+ locationItem = db.Locations.Where(location => location.IsSelected).FirstOrDefault();
+ locationItem.IsNewLocation = false;
+ db.SubmitChanges();
+ }
}
}
NavigationService.Navigate(new Uri(uri, UriKind.Relative));
}
- async private void GetDataAsync()
+ async private Task GetDataAsync(Location locationItem)
{
// Gets the data from the web.
// TODO: multiple threads writing/reading same data :(
- (Application.Current as WeatherInformation.App).ApplicationDataObject = await LoadDataAsync();
+ (Application.Current as WeatherInformation.App).ApplicationDataObject = await LoadDataAsync(locationItem);
}
/// <summary>
/// Retrieve remote weather data.
/// </summary>
- async public Task<WeatherData> LoadDataAsync()
+ async public Task<WeatherData> LoadDataAsync(Location locationItem)
{
- double latitude = _locationItem.Latitude;
- double longitude = _locationItem.Longitude;
+ double latitude = locationItem.Latitude;
+ double longitude = locationItem.Longitude;
int resultsNumber = Convert.ToInt32(AppResources.APIOpenWeatherMapResultsNumber);
CustomHTTPClient httpClient = new CustomHTTPClient();
string JSONRemoteCurrentWeather = await httpClient.GetWeatherDataAsync(formattedCurrentURL);
var parser = new ServiceParser(new JsonParser());
- return parser.WeatherDataParser(JSONRemoteForecastWeather, JSONRemoteCurrentWeather);
+ var weatherData = parser.WeatherDataParser(JSONRemoteForecastWeather, JSONRemoteCurrentWeather);
+ weatherData.City = locationItem.City;
+ weatherData.Country = locationItem.Country;
+
+ return weatherData;
}
private void Location_Click(object sender, EventArgs e)
{
public partial class MapPage : PhoneApplicationPage
{
- // Data context for the local database
- private LocationDataContext _locationDB;
// TODO anything better than these two instance fields? :(
private string _city;
private string _country;
public MapPage()
{
InitializeComponent();
-
- // Connect to the database and instantiate data context.
- _locationDB = new LocationDataContext(LocationDataContext.DBConnectionString);
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
+
+ Location locationItem = null;
+ using (var db = new LocationDataContext(LocationDataContext.DBConnectionString))
+ {
+ // Define the query to gather all of the to-do items.
+ // var toDoItemsInDB = from Location location in _locationDB.Locations where location.IsSelected select location;
+ locationItem = db.Locations.Where(location => location.IsSelected).FirstOrDefault();
+ }
- // Define the query to gather all of the to-do items.
- // var toDoItemsInDB = from Location location in _locationDB.Locations where location.IsSelected select location;
- var locationItem = _locationDB.Locations.Where(location => location.IsSelected).FirstOrDefault();
if (locationItem != null)
{
GeoCoordinate geoCoordinate = ConvertLocation(locationItem);
}
}
- protected override void OnNavigatedFrom(System.Windows.Navigation.NavigationEventArgs e)
- {
- // Call the base method.
- base.OnNavigatedFrom(e);
-
- // Save changes to the database.
- _locationDB.SubmitChanges();
-
- // No calling _locationDB.Dispose? :/
- }
-
private async Task GetCurrentLocationAndUpdateMap()
{
Geolocator geolocator = new Geolocator();
// http://stackoverflow.com/questions/4521435/what-specific-values-can-a-c-sharp-double-represent-that-a-sql-server-float-can
private void StoreLocation(GeoCoordinate geocoordinate)
{
- var locationItem = _locationDB.Locations.Where(location => location.IsSelected).FirstOrDefault();
- if (locationItem != null)
+ Location locationItem = null;
+ using (var db = new LocationDataContext(LocationDataContext.DBConnectionString))
{
- locationItem.Latitude = geocoordinate.Latitude;
- locationItem.Longitude = geocoordinate.Longitude;
- locationItem.Altitude = geocoordinate.Altitude;
- locationItem.City = _city ?? "";
- locationItem.Country = _country ?? "";
- locationItem.HorizontalAccuracy = geocoordinate.HorizontalAccuracy;
- locationItem.VerticalAccuracy = geocoordinate.VerticalAccuracy;
- locationItem.Speed = geocoordinate.Speed;
- locationItem.Course = geocoordinate.Course;
- locationItem.IsNewLocation = true;
- locationItem.IsSelected = true;
- }
- else
- {
- locationItem = new Location()
+ // Define the query to gather all of the to-do items.
+ // var toDoItemsInDB = from Location location in _locationDB.Locations where location.IsSelected select location;
+ locationItem = db.Locations.Where(location => location.IsSelected).FirstOrDefault();
+
+ if (locationItem != null)
{
- Latitude = geocoordinate.Latitude,
- Longitude = geocoordinate.Longitude,
- Altitude = geocoordinate.Altitude,
- City = _city ?? "",
- Country = _country ?? "",
- HorizontalAccuracy = geocoordinate.HorizontalAccuracy,
- VerticalAccuracy = geocoordinate.VerticalAccuracy,
- Speed = geocoordinate.Speed,
- Course = geocoordinate.Course,
- IsNewLocation = true,
- IsSelected = true,
- };
+ locationItem.Latitude = geocoordinate.Latitude;
+ locationItem.Longitude = geocoordinate.Longitude;
+ locationItem.Altitude = geocoordinate.Altitude;
+ locationItem.City = _city ?? "";
+ locationItem.Country = _country ?? "";
+ locationItem.HorizontalAccuracy = geocoordinate.HorizontalAccuracy;
+ locationItem.VerticalAccuracy = geocoordinate.VerticalAccuracy;
+ locationItem.Speed = geocoordinate.Speed;
+ locationItem.Course = geocoordinate.Course;
+ locationItem.IsNewLocation = true;
+ locationItem.IsSelected = true;
+ }
+ else
+ {
+ locationItem = new Location()
+ {
+ Latitude = geocoordinate.Latitude,
+ Longitude = geocoordinate.Longitude,
+ Altitude = geocoordinate.Altitude,
+ City = _city ?? "",
+ Country = _country ?? "",
+ HorizontalAccuracy = geocoordinate.HorizontalAccuracy,
+ VerticalAccuracy = geocoordinate.VerticalAccuracy,
+ Speed = geocoordinate.Speed,
+ Course = geocoordinate.Course,
+ IsNewLocation = true,
+ IsSelected = true,
+ };
+
+ // Add a location item to the local database.
+ db.Locations.InsertOnSubmit(locationItem);
+ }
- // Add a location item to the local database.
- _locationDB.Locations.InsertOnSubmit(locationItem);
+ db.SubmitChanges();
}
}
projects / CSharpForFun / .git / commitdiff