/// <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 { }
}
/// <summary>
/// Navigates to the desired page, passing a parameter to the next page.
/// </summary>
/// <param name="pageType">
/// The type of page to navigate to.
/// </param>
/// <param name="parameter">
/// The parameter to pass to the page being navigated to.
/// </param>
/// <param name="type">
/// The type of navigation to use.
/// </param>
/// <remarks>
/// This method calls SaveState() on the current page to store page specific state.
/// </remarks>
public static void NavigateTo(Type pageType, object parameter, NavigationType type)
{
_pageState = null;
if (type == NavigationType.Default)
{
Dictionary <string, object> pageState = (_currentPage as IManageable).SaveState();
RootFrame.Navigate(pageType, parameter);
PageStates.Add(pageState);
}
else
{
RootFrame.Navigate(pageType, parameter);
RootFrame.BackStack.Clear();
PageStates.Clear();
}
}
/// <summary>
/// Navigates to the desired page, passing a parameter to the next page.
/// </summary>
/// <param name="pageType">
/// The type of page to navigate to.
/// </param>
/// <param name="parameter">
/// The parameter to pass to the page being navigated to.
/// </param>
/// <param name="type">
/// The type of navigation to use.
/// </param>
/// <remarks>
/// This method calls SaveState() on the current page to store page specific state.
/// </remarks>
public static void NavigateTo(Type pageType, object parameter, NavigationType type)
{
_pageState = null;
_currentType = type;
if (type == NavigationType.Default)
{
Dictionary <string, object> pageState = (_currentPage as IManageable).SaveState();
RootFrame.Navigate(pageType, parameter);
PageStates.Add(pageState);
}
else
{
ClearPageCache();
RootFrame.Navigate(pageType, parameter);
// Clearing of back stack and page states occur in Navigated event handler.
}
}