/// <inheritdoc />
/// <summary>
/// Hook for processing the start of the application's lifecycle to set up required state
/// </summary>
/// <param name="args">Arguments providing additional information about the starting of the application</param>
protected override void OnStartup(StartupEventArgs args)
{
base.OnStartup(args);
// Initialize the logger for the application
if (!LoggingUtilities.InitializeLogger())
{
DoShutdown(ResultCode.LoggerFailure);
return;
}
// Hook up an exception handler for processing unhandled exceptions thrown on the dispatcher thread
DispatcherUnhandledException += DispatcherExceptionHandler;
try
{
// Log the user in. Because the login prompt is the first window displayed by the application, it's incorrectly
// interpreted to be the main window, meaning that the default behavior of the application will be to exit when
// the window closes. Since this isn't the desired behavior here, the shutdown mode is temporarily changed for
// the duration of time that the login window is open.
Current.ShutdownMode = ShutdownMode.OnExplicitShutdown;
var loginViewModel = new LoginViewModel();
new LoginWindow {
DataContext = loginViewModel
}.ShowDialog();
if (!loginViewModel.DidUserLogin)
{
if (Logger.IsInfoEnabled)
{
Logger.Info("User aborted login; exiting application");
}
DoShutdown();
return;
}
Current.ShutdownMode = ShutdownMode.OnMainWindowClose;
if (Logger.IsInfoEnabled)
{
Logger.InfoFormat("Logging in user with username {0}", loginViewModel.Username);
}
// Create and initialize the main viewmodel of the application, establishing a connection to the SMTP server
_viewModel = new MainViewModel();
if (!_viewModel.Initialize(new MailAddress(loginViewModel.Username), loginViewModel.Password))
{
if (Logger.IsWarnEnabled)
{
Logger.Warn("Initialization of the backing viewmodel failed");
}
DoShutdown(ResultCode.LifecycleFailure);
return;
}
var mainWindow = new MainWindow
{
DataContext = _viewModel,
};
mainWindow.Show();
}
catch (Exception ex)
{
if (Logger.IsErrorEnabled)
{
Logger.Error("An exception occurred during startup", ex);
}
DoShutdown(ResultCode.LifecycleFailure);
}
}