public async void SaveAsync(CacheFolder cache)
{
savePending = true;
if (!saving)
{
saving = true;
try
{
savePending = false;
Log.WriteLine("Saving DataStore at time : " + DateTime.Now.ToString());
IsolatedStorage <DataStore> store = new IsolatedStorage <DataStore>(cache);
await store.SaveToFileAsync(DataFile, this);
if (savePending)
{
SaveAsync(cache);
}
}
catch (Exception ex)
{
Log.WriteLine("Error saving DataStore: " + ex.Message);
}
finally
{
saving = false;
}
}
}
public static async Task OpenLog(CacheFolder cache)
{
if (log == null)
{
try
{
var file = await cache.CreateFileAsync("log.txt");
log = new StreamWriter(await file.OpenStreamForWriteAsync());
}
catch (Exception ex)
{
Debug.WriteLine("Error opening log: " + ex.Message);
}
}
}
public static async Task <DataStore> LoadAsync(CacheFolder cache)
{
IsolatedStorage <DataStore> store = new IsolatedStorage <DataStore>(cache);
DataStore data = await store.LoadFromFileAsync(DataFile);
if (data == null)
{
data = new DataStore();
}
else
{
foreach (var info in data.Cameras.ToArray())
{
if (info.StaticImageUrl != null)
{
data.Cameras.Remove(info);
}
}
}
return(data);
}
/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used when the application is launched to open a specific file, to display
/// search results, and so forth.
/// </summary>
/// <param name="args">Details about the launch request and process.</param>
protected override async void OnLaunched(LaunchActivatedEventArgs args)
{
Frame rootFrame = Window.Current.Content as Frame;
// load our local data store
CacheFolder folder = new CacheFolder("Data");
CacheFolder = folder;
await folder.PopulateCache();
await Log.OpenLog(folder);
var store = await DataStore.LoadAsync(folder);
if (!string.IsNullOrEmpty(store.SnapshotDirectory) && !string.IsNullOrEmpty(store.SnapshotDirectoryToken))
{
try
{
store.SnapshotFolder = await Windows.Storage.AccessCache.StorageApplicationPermissions.MostRecentlyUsedList.GetFolderAsync(store.SnapshotDirectoryToken);
store.SnapshotDirectory = store.SnapshotFolder.Path;
}
catch
{
// bummer, didn't work...
store.SnapshotDirectoryToken = null;
}
}
if (store.SnapshotDirectory == null || store.SnapshotDirectoryToken == null)
{
store.SnapshotFolder = await CacheFolder.GetOrCreateFolder("Snapshots");
store.SnapshotDirectory = store.SnapshotFolder.Path;
}
this.Firmware = await Firmware.LoadAsync();
Log.WriteLine("OnLaunched {0}", args.Kind);
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active
if (rootFrame == null)
{
// Create a Frame to act as the navigation context and navigate to the first page
rootFrame = new Frame();
if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//TODO: Load state from previously suspended application
}
// Place the frame in the current Window
Window.Current.Content = rootFrame;
Window.Current.VisibilityChanged += OnWindowVisibilityChanged;
}
if (rootFrame.Content == null)
{
// When the navigation stack isn't restored navigate to the first page,
// configuring the new page by passing required information as a navigation
// parameter
if (!rootFrame.Navigate(typeof(MainPage), args.Arguments))
{
throw new Exception("Failed to create initial page");
}
}
// Ensure the current window is active
Window.Current.Activate();
}
public IsolatedStorage(CacheFolder cacheFolder)
{
this.cacheFolder = cacheFolder;
}
