/// <summary>
/// Call this method to save the navigation history along with session state locally. On failure, the Last Saved date is set to default (of the data type).
/// </summary>
/// <returns></returns>
public static async Task SaveSessionState()
{
try
{
LastSessionSavedDate = default(DateTimeOffset);
LastSessionOwner = null;
PageStates.Add((_currentPage as IManageable).SaveState());
StorageFile navFile = await _folder.CreateFileAsync(NAV_FILE_NAME, CreationCollisionOption.ReplaceExisting);
StorageFile stateFile = await _folder.CreateFileAsync(STATE_FILE_NAME, CreationCollisionOption.ReplaceExisting);
bool result = true;
result &= await StorageHelper.TryWriteAsync(navFile, RootFrame.GetNavigationState());
result &= await StorageHelper.TryWriteAsync(stateFile, PageStates);
if (result == true)
{
LastSessionSavedDate = DateTimeOffset.UtcNow;
LastSessionOwner = UserManager.CurrentUser.RegNo;
}
}
catch { }
}