// обработка нажатия кнопки добавления
private async void CreateStudent(object sender, EventArgs e)
{
Student student = new Student();
StudentPage studentPage = new StudentPage();
studentPage.BindingContext = student;
await Navigation.PushAsync(studentPage);
}
// обработка нажатия элемента в списке
private async void OnItemSelected(object sender, SelectedItemChangedEventArgs e)
{
Student selectedStudent = (Student)e.SelectedItem;
StudentPage studentPage = new StudentPage();
studentPage.BindingContext = selectedStudent;
await Navigation.PushAsync(studentPage);
}
