private void SaveChanges(object sender, EventArgs e) { var firstName = firstNameTextBox.Text; var lastName = lastNameTextBox.Text; var dateOfBirth = dateOfBirthDTP.Value; var gender = genderListBox.SelectedItem as string; var grade = gradeTextBox.Text; var isSaved = _studentsRepository.AddOrEditAStudent(firstName, lastName, dateOfBirth, gender, grade, _student.StudentId); if (!isSaved) { MessageBox.Show("Pogreska pri unosu. Sva polja moraju imati sadrzaj! Razred mora biti formata broj.slovo", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } else { MessageBox.Show("Ucenik uspjesno spremljen!", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information); Close(); } }