private async Task SaveCommandExecute()
{
LocalDatabaseService database = Ioc.Container.Resolve <LocalDatabaseService>();
if (string.IsNullOrWhiteSpace(NoteTitle))
{
await NavigationService.DisplayAlert("Invalid Note", "You can't leave the title empty", "Ok");
}
await database.Insert(new Note
{ NoteTitle = NoteTitle, Description = NoteDescription, NoteDateTime = DateTime.Now });
await NavigationService.PopPageModel(true);
}
protected override void ViewIsAppearing(object sender, EventArgs e)
{
Task.Run(async() =>
{
_database = Ioc.Container.Resolve <ILocalDatabaseService>() as LocalDatabaseService;
if (!LocalDatabaseService.DbInitialized)
{
await InitializeDb();
}
if (_database != null)
{
Notes = new ObservableCollection <Note>(await _database.GetAll <Note>());
}
});
}
private void InitializeRateViewModel()
{
ExchangeRateViewModel = new RatesHostViewModel {
IsBusy = true
};
CalculatorVm = new CalculatorViewModel();
var rates = LocalDatabaseService.GetRates();
rates.ContinueWith(x =>
{
Debug.WriteLine("MessaginCenter: about to send (GetLocal)");
MessagingCenter.Send <MainPageViewModel, IEnumerable <Rate> >(this, "GetLocal", x.Result);
});
}
protected override void OnResume()
{
var connection = DependencyService.Get <INetworkConnectionInfo>();
if (connection.IsOnline())
{
MessagingCenter.Send <App, bool>(this, "ShowBusyIndicatorOnResume", true);
}
// Handle when your app resumes
var rates = LocalDatabaseService.GetRates();
rates.ContinueWith(x =>
{
Debug.WriteLine("MessaginCenter: about to send (SyncOnResume)");
MessagingCenter.Send <App, IEnumerable <Rate> >(this, "SyncOnResume", x.Result);
});
}
public SettingViewModel()
{
DarkModeIsToggled = GlobalVariables.DarkMode;
CurrentVersion = AppInfo.VersionString;
ThemeCommand = new Command(() =>
{
GlobalVariables.DarkMode = DarkModeIsToggled;
Theme theme = GlobalVariables.DarkMode ? Theme.Dark : Theme.Light;
ICollection <ResourceDictionary> mergedDictionaries = Application.Current.Resources.MergedDictionaries;
if (mergedDictionaries != null)
{
mergedDictionaries.Clear();
switch (theme)
{
case Theme.Dark:
mergedDictionaries.Add(new DarkTheme());
break;
case Theme.Light:
default:
mergedDictionaries.Add(new LightTheme());
break;
}
}
}, () => { return(true); });
ClearCacheCommand = new Command(async() =>
{
LocalDatabaseService localDatabaseService = new LocalDatabaseService();
int total = await localDatabaseService.ClearAllData();
if (total > 0)
{
CrossToastPopUp.Current.ShowToastSuccess("清理完成，共清理" + total.ToString() + "条数据", ToastLength.Long);
}
}, () => { return(true); });
UpdateCommand = new Command(async() =>
{
await CheckAppVersionAsync();
}, () => { return(true); });
}
public static async Task <IEnumerable <Rate> > SyncRemoteRates(DateTime?lastUpdate)
{
List <Rate> results;
HttpWebRequest request = CreateRequest();
var responseTask = request.GetResponseAsync();
using (var response = await responseTask)
{
using (var reader = new StreamReader(response.GetResponseStream()))
{
var content = reader.ReadToEnd();
results = JsonConvert.DeserializeObject <List <Rate> >(content);
}
}
DateTime remoteLastUpdate = (from d in results select d.LastUpdated).Max();
if (!lastUpdate.HasValue || lastUpdate.Value != remoteLastUpdate)
{
await LocalDatabaseService.SyncLocalDatabase(results);
}
return(results);
}