private void add_Click(object sender, RoutedEventArgs e) { if (surname.Text == "") { a1.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (name.Text == "") { a2.Visibility = Visibility.Visible; } if (middle_name.Text == "") { a3.Visibility = Visibility.Visible; } if (series.Text == "") { a6.Visibility = Visibility.Visible; } if (number.Text == "") { a5.Visibility = Visibility.Visible; } if (phone.Text == "") { a8.Visibility = Visibility.Visible; } if (rank.Text == "") { a7.Visibility = Visibility.Visible; } if (city.Text == "") { a9.Visibility = Visibility.Visible; } if (street.Text == "") { a10.Visibility = Visibility.Visible; } if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (name.Text == "") { a2.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (middle_name.Text == "") { a3.Visibility = Visibility.Visible; } if (series.Text == "") { a6.Visibility = Visibility.Visible; } if (number.Text == "") { a5.Visibility = Visibility.Visible; } if (phone.Text == "") { a8.Visibility = Visibility.Visible; } if (rank.Text == "") { a7.Visibility = Visibility.Visible; } if (city.Text == "") { a9.Visibility = Visibility.Visible; } if (street.Text == "") { a10.Visibility = Visibility.Visible; } if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (middle_name.Text == "") { a3.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (series.Text == "") { a6.Visibility = Visibility.Visible; } if (number.Text == "") { a5.Visibility = Visibility.Visible; } if (phone.Text == "") { a8.Visibility = Visibility.Visible; } if (rank.Text == "") { a7.Visibility = Visibility.Visible; } if (city.Text == "") { a9.Visibility = Visibility.Visible; } if (street.Text == "") { a10.Visibility = Visibility.Visible; } if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (series.Text == "") { a6.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (number.Text == "") { a5.Visibility = Visibility.Visible; } if (phone.Text == "") { a8.Visibility = Visibility.Visible; } if (rank.Text == "") { a7.Visibility = Visibility.Visible; } if (city.Text == "") { a9.Visibility = Visibility.Visible; } if (street.Text == "") { a10.Visibility = Visibility.Visible; } if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (number.Text == "") { a5.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (phone.Text == "") { a8.Visibility = Visibility.Visible; } if (rank.Text == "") { a7.Visibility = Visibility.Visible; } if (city.Text == "") { a9.Visibility = Visibility.Visible; } if (street.Text == "") { a10.Visibility = Visibility.Visible; } if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (rank.Text == "") { a7.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (phone.Text == "") { a8.Visibility = Visibility.Visible; } if (city.Text == "") { a9.Visibility = Visibility.Visible; } if (street.Text == "") { a10.Visibility = Visibility.Visible; } if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (phone.Text == "") { a8.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (city.Text == "") { a9.Visibility = Visibility.Visible; } if (street.Text == "") { a10.Visibility = Visibility.Visible; } if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (city.Text == "") { a9.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (street.Text == "") { a10.Visibility = Visibility.Visible; } if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (street.Text == "") { a10.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (home.Text == "") { a11.Visibility = Visibility.Visible; } if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (home.Text == "") { a11.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; } } else { if (male.IsChecked == false && female.IsChecked == false) { a4.Visibility = Visibility.Visible; p.Visibility = Visibility.Visible; } else { string sex = ""; if (male.IsChecked == true) { sex = male.Content.ToString(); } else { sex = female.Content.ToString(); } TeacherInterface a = new ClassTeacher(); a.Insert(series, number, sex, city, street, home, flat, phone, surname, name, middle_name, rank); Cleaning(); } } } } } } } } } } } }