public static void SaveSettingsData(Settings latestSettingsData)
{
using (var userIsoStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (userIsoStorage.FileExists("settingsData.dat"))
{
userIsoStorage.DeleteFile("settingsData.dat");
}
using (var iss = userIsoStorage.CreateFile("settingsData.dat"))
{
SilverlightSerializer.Serialize(latestSettingsData, iss);
}
}
}
public static void SaveImplementedSettings(Settings latestImplementedSettings)
{
using (var userIsoStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (userIsoStorage.FileExists("LastImplementedSettings.dat"))
{
userIsoStorage.DeleteFile("LastImplementedSettings.dat");
}
using (var iss = userIsoStorage.CreateFile("LastImplementedSettings.dat"))
{
SilverlightSerializer.Serialize(latestImplementedSettings, iss);
}
}
}
public static Settings GetSettingsData()
{
using (var userIsoStore = IsolatedStorageFile.GetUserStoreForApplication())
{
if (userIsoStore.FileExists("settingsData.dat"))
{
using (var iss = userIsoStore.OpenFile("settingsData.dat", System.IO.FileMode.Open))
{
return SilverlightSerializer.Deserialize(iss) as Settings;
}
}
else
{
Settings newSettingsData = new Settings();
return newSettingsData;
}
}
}
/// <summary>
/// Initializes a new instance of the MainViewModel class.
/// </summary>
public MainViewModel()
{
if (IsInDesignMode)
{
// Code runs in Blend --> create design time data.
}
else
{
// Code runs "for real"
}
_appSettings = SettingsService.GetSettingsData();
// Set everything
IsUsingToast = _appSettings.IsUsingToast;
IsUsingSimpleTile = _appSettings.IsUsingSimpleTile;
IsUsingLiveTile = _appSettings.IsUsingLiveTile;
_pushNotificationService = new PushNotificationService();
_pushNotificationService.GotPushUri += new System.EventHandler<GotPushUriEventArgs>(_pushNotificationService_GotPushUri);
}
public void GetPushSubscription(Settings _latestSettings)
{
_appSettings = _latestSettings;
try
{
//Step 1: See if we already have a valid HttpNotificationChannel
_notificationChannel = HttpNotificationChannel.Find(_pushChannelName);
} catch { }
// If we have already implemented the channel && if nothing has
// changed in the settings since last time
if (_notificationChannel != null && DoSettingsMatch(_appSettings, _previousSettings))
{
// Step 2: Make sure we got the channel Uri appropriately
if (_notificationChannel.ChannelUri != null)
{
// Success!
RaiseGotPushUri(_notificationChannel.ChannelUri);
}
else
{
// If we never got the Uri back, unbind and reset everything...
this.UnbindAndResetPush();
// Step 3: ... and re-register the event handlers
_notificationChannel = new HttpNotificationChannel(_pushChannelName);
_notificationChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(_notificationChannel_ChannelUriUpdated);
_notificationChannel.HttpNotificationReceived += new EventHandler<HttpNotificationEventArgs>(_notificationChannel_HttpNotificationReceived);
_notificationChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(_notificationChannel_ErrorOccurred);
// Step 4: Ask for a new Uri
_notificationChannel.Open();
// Step 5: Set the HttpNotificationChannel to handle
// the appropriate push notifications
BindNotifications(_notificationChannel);
}
}
else
{
// Step 3: Register the event handlers so we can handle when we get
// the channel information (or errors) back.
_notificationChannel = new HttpNotificationChannel(_pushChannelName);
_notificationChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(_notificationChannel_ChannelUriUpdated);
_notificationChannel.HttpNotificationReceived += new EventHandler<HttpNotificationEventArgs>(_notificationChannel_HttpNotificationReceived);
_notificationChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(_notificationChannel_ErrorOccurred);
try
{
// Step 4: Ask for a new Uri
_notificationChannel.Open();
// Step 5: Set the HttpNotificationChannel to handle
// the appropriate push notifications
BindNotifications(_notificationChannel);
// Now that we've implememted the settings, let's save them so we can remember
// them next time.
SettingsService.SaveImplementedSettings(_appSettings);
_previousSettings = _appSettings;
}
catch (Exception err)
{
// Oops! Something went wrong, null out the channel.
_notificationChannel = null;
}
}
}
private bool DoSettingsMatch(Settings _newSettings, Settings _oldSettings)
{
if ((_newSettings.IsUsingSimpleTile == _oldSettings.IsUsingSimpleTile) &&
(_newSettings.IsUsingLiveTile == _oldSettings.IsUsingLiveTile) &&
(_newSettings.IsUsingToast == _oldSettings.IsUsingToast))
{
return true;
}
else
{
return false;
}
}
