public static BlobService GetInstance()
{
if (_instance == null)
{
_instance = new BlobService();
}
return(_instance);
}
public async Task InitializeAsync()
{
if (_mobileService != null)
{
return;
}
// Inicialización de SQLite local (cache offline)
var store = new MobileServiceSQLiteStore("cursoxamarin.db");
store.DefineTable <City>();
_mobileService = new MobileServiceClient(GlobalSettings.CityMobileServiceEndpoint);
_cityTable = _mobileService.GetSyncTable <City>();
await _mobileService.SyncContext.InitializeAsync(store,
new MobileServiceSyncHandler());
if (CrossConnectivity.Current.IsConnected)
{
try
{
var cities = await _cityTable.ReadAsync();
var citiesList = new List <City>(cities);
//subimos las imagenes offline al blob
foreach (var city in citiesList.Where(city => city.OfflineImage != null))
{
city.Image = await BlobService.GetInstance().UploadPhotoAsync(city.OfflineImage);
city.OfflineImage = null;
await _cityTable.UpdateAsync(city);
}
// Subir cambios a la base de datos remota
await _mobileService.SyncContext.PushAsync();
await _cityTable.PullAsync(
"allCities", _cityTable.CreateQuery());
}
catch (Exception ex)
{
Debug.WriteLine("Exception: {0}", ex.Message);
}
}
}
