public static async Task <AppState> LoadAppStateInitial()
{
var file = await TryLoadConfigFile().ConfigureAwait(false);
AppState resultState = new AppState();
// app state no yet stored
if (file == null)
{
await StoreInitialAppState(resultState);
}
else
{
try
{
resultState = await XMLStorage.ReadObjectFromXmlFileAsync <AppState>(file).ConfigureAwait(false);
}
catch (Exception ex)
{
// try to overwrite inconsistent state or crash
await StoreInitialAppState(resultState);
}
}
return(resultState);
}
internal static async Task <AppState> LoadAppStateFromUserDefinedLocation()
{
AppState resultState = null;
var loadConfigPicker = new FileOpenPicker();
loadConfigPicker.ViewMode = PickerViewMode.List;
loadConfigPicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
loadConfigPicker.FileTypeFilter.Add(".xml");
StorageFile file = await loadConfigPicker.PickSingleFileAsync();
if (file != null)
{
var token = StorageApplicationPermissions.FutureAccessList.Add(file, _userDefinedSettingsToken);
LocalSettings.Values[_userDefinedSettingsToken] = token;
resultState = await XMLStorage.ReadObjectFromXmlFileAsync <AppState>(file);
}
else
{
Debug.WriteLine("Loading file was cancelled.");
}
return(resultState);
}
