private void PostponeButton_Click(object sender, RoutedEventArgs e) { // get the number of minute if (PostponeComboBox.SelectedItem.Equals(OneMinItem)) { numberOfMinute = 1; } else if (PostponeComboBox.SelectedItem.Equals(FiveMinItem)) { numberOfMinute = 5; } else if (PostponeComboBox.SelectedItem.Equals(TenMinItem)) { numberOfMinute = 10; } else if (PostponeComboBox.SelectedItem.Equals(ThirtyMinItem)) { numberOfMinute = 30; } else if (PostponeComboBox.SelectedItem.Equals(OneHourItem)) { numberOfMinute = 60; } else if (PostponeComboBox.SelectedItem.Equals(EightHourItem)) { numberOfMinute = 480; } else if (PostponeComboBox.SelectedItem.Equals(OneDayItem)) { numberOfMinute = 1440; } commonSet.PostponePrintingTime(numberOfMinute); commonSet.SaveNextTime(); this.Close(); }