// Code to execute on Unhandled Exceptions
private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
{
// Log unhandled exception
AppLogs.WriteError("App", e.ExceptionObject);
if (Debugger.IsAttached)
{
// An unhandled exception has occurred; break into the debugger
Debugger.Break();
}
}
public static async Task WriteText(string fileName, string content)
{
try
{
var folder = FileSystem.Current.LocalStorage;
var file = await folder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
await file.WriteAllTextAsync(content);
}
catch (Exception ex)
{
AppLogs.WriteError("UserStorage.WriteText", ex);
}
}
private void StartBackgroundProcess()
{
// Obtain a reference to the period task, if one exists
_periodicTask = ScheduledActionService.Find(_periodicTaskName) as PeriodicTask;
// If the task already exists and background agents are enabled for the
// application, you must remove the task and then add it again to update
// the schedule
if (_periodicTask != null)
{
RemoveAgent(_periodicTaskName);
}
_periodicTask = new PeriodicTask(_periodicTaskName);
// The description is required for periodic agents. This is the string that the user
// will see in the background services Settings page on the device.
_periodicTask.Description = "This demonstrates a periodic task.";
// Place the call to Add in a try block in case the user has disabled agents.
try
{
ScheduledActionService.Add(_periodicTask);
// If debugging is enabled, use LaunchForTest to launch the agent in one minute.
#if DEBUG
ScheduledActionService.LaunchForTest(_periodicTaskName, TimeSpan.FromSeconds(60));
#endif
}
catch (InvalidOperationException exception)
{
if (exception.Message.Contains("BNS Error: The action is disabled"))
{
AppLogs.WriteWarning("StartBackgroundProcess", "Background agents for this application have been disabled by the user.");
}
if (exception.Message.Contains("BNS Error: The maximum number of ScheduledActions of this type have already been added."))
{
AppLogs.WriteWarning("StartBackgroundProcess", "The system prompts the user when the hard limit of periodic tasks has been reached.");
}
}
catch (Exception ex)
{
AppLogs.WriteWarning("StartBackgroundProcess", ex.Message);
}
}
public static async Task DeleteFileIfExists(string fileName)
{
try
{
var folder = FileSystem.Current.LocalStorage;
var file = await folder.GetFileAsync(fileName);
if (file != null)
{
await file.DeleteAsync();
}
}
catch (FileNotFoundException)
{
}
catch (Exception ex)
{
AppLogs.WriteError("UserStorage.DeleteFileIfExists", ex);
}
}
public static async Task DeleteFileIfExists(string fileName)
{
try
{
var folder = ApplicationData.Current.LocalFolder;
var file = await ApplicationData.Current.LocalFolder.GetFileAsync(fileName);
if (file != null)
{
await file.DeleteAsync(StorageDeleteOption.PermanentDelete);
}
}
catch (FileNotFoundException)
{
}
catch (Exception ex)
{
AppLogs.WriteError("UserStorage.DeleteFileIfExists", ex);
}
}
public static async Task <string> ReadTextFromFile(string fileName)
{
try
{
var folder = FileSystem.Current.LocalStorage;
var file = await folder.GetFileAsync(fileName);
if (file != null)
{
return(await file.ReadAllTextAsync());
}
}
catch (FileNotFoundException)
{
}
catch (Exception ex)
{
AppLogs.WriteError("UserStorage.ReadTextFromFile", ex);
}
return(String.Empty);
}
static public string ReadTextFromFile(string fileName)
{
try
{
using (var userStorage = new UserStorage())
{
lock (_userStoreLock)
{
if (userStorage.FileExists(fileName))
{
return(userStorage.ReadText(fileName));
}
}
}
}
catch (Exception ex)
{
AppLogs.WriteError("UserStorage.ReadTextFromFile", ex);
}
return(String.Empty);
}
/// <summary>
/// Constructor for the Application object.
/// </summary>
public App()
{
// Log application start
AppLogs.WriteInfo("App", "Started");
// Global handler for uncaught exceptions.
UnhandledException += Application_UnhandledException;
// Standard XAML initialization
InitializeComponent();
// Phone-specific initialization
InitializePhoneApplication();
// Language display initialization
InitializeLanguage();
// Show graphics profiling information while debugging.
if (Debugger.IsAttached)
{
// Display the current frame rate counters.
//Application.Current.Host.Settings.EnableFrameRateCounter = true;
// Show the areas of the app that are being redrawn in each frame.
//Application.Current.Host.Settings.EnableRedrawRegions = true;
// Enable non-production analysis visualization mode,
// which shows areas of a page that are handed off to GPU with a colored overlay.
//Application.Current.Host.Settings.EnableCacheVisualization = true;
// Prevent the screen from turning off while under the debugger by disabling
// the application's idle detection.
// Caution:- Use this under debug mode only. Application that disables user idle detection will continue to run
// and consume battery power when the user is not using the phone.
PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled;
}
}
