private void goToNumberButton_Click(object sender, RoutedEventArgs e) { if (null == goToNumberFileComboBox.SelectedItem) { return; } gotoProgressButton.IsEnabled = false; gotoProgressButton.ProgressBarVisibility = Visibility.Visible; gotoProgressButton.CurrentValue = 0; gotoProgressButton.MinValue = 0; gotoProgressButton.MaxValue = Math.Max(goToNumberTextBox.NumericalValue, 1); gotoProgressButton.StepValue = 1; LogViewModel.BeginNewReadAtByteOccurrenceNumber(Math.Max(0, goToNumberTextBox.NumericalValue - 1), goToNumberFileComboBox.SelectedItem as string, gotoProgressButton.PerformStep); }