private void StartTransfering(string transferToAcc, double amount) { ProgressPage progressPage = new ProgressPage(); _navigationService.Navigate(progressPage); var progressTimer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(2000) }; progressTimer.Start(); progressTimer.Tick += (_sender, args) => { DBHelper dBHelper = new DBHelper(); bool transferToAccIsValid = dBHelper.CheckAccountNo(transferToAcc); if (transferToAccIsValid) { User user = dBHelper.GetUser(ATMSession.AccountNo); transaction = new Transaction(user.User_Id, ATMSession.AccountNo, DateTime.Now, amount, transferToAcc); ReturnResult transactionResult = dBHelper.Transfer(transaction); if (transactionResult == ReturnResult.Success) { ATMSession.RestartSessionTimer(); if (_canPrintReceipt) { CreateReceiptPDF(); } TransactionSuccessMsg(); } else if (transactionResult == ReturnResult.IsEmpty) { var result = WpfMessageBox.Show("Warning", "Your account balance is Rs. 0.00", MessageBoxButton.OK, WpfMessageBox.MessageBoxImage.Warning, WpfMessageBox.MessageBoxType.Warning); if (result.Equals(MessageBoxResult.OK)) { ATMSession.RestartSessionTimer(); TransferAmountTextBox.SelectAll(); TransferAmountTextBox.Focus(); } } else if (transactionResult == ReturnResult.AmountIsGreater) { var result = WpfMessageBox.Show("Warning", "Entered amount is greater than your account balance.", MessageBoxButton.OK, WpfMessageBox.MessageBoxImage.Warning, WpfMessageBox.MessageBoxType.Warning); if (result.Equals(MessageBoxResult.OK)) { ATMSession.RestartSessionTimer(); TransferAmountTextBox.SelectAll(); TransferAmountTextBox.Focus(); } } else { var result = WpfMessageBox.Show("Error", "Transfer Error. Please contact your bank.", MessageBoxButton.OK, WpfMessageBox.MessageBoxImage.Error, WpfMessageBox.MessageBoxType.Error); if (result.Equals(MessageBoxResult.OK)) { ATMSession.RestartSessionTimer(); TransferAmountTextBox.SelectAll(); TransferAmountTextBox.Focus(); } } _navigationService.GoBack(); progressTimer.Stop(); progressTimer = null; } else { var result = WpfMessageBox.Show("Error", "Transfer to account is not a valid account.", MessageBoxButton.OK, WpfMessageBox.MessageBoxImage.Error, WpfMessageBox.MessageBoxType.Error); if (result.Equals(MessageBoxResult.OK)) { ATMSession.RestartSessionTimer(); TransferAccountTextBox.SelectAll(); TransferAccountTextBox.Focus(); } _navigationService.GoBack(); progressTimer.Stop(); progressTimer = null; } }; }