public MainViewModel()
{
try
{
NewStudent = new Student();
SelectedDate = DateTime.Now.Date;
AddNewStudentCommand = new RelayCommand(AddNewStudent, CanAddNewStudent);
AddClassCommand = new RelayCommand(AddClass, CanAddClass);
CancelNewStudentCommand = new RelayCommand(() => { IsNewStudentOpen = false; });
OpenAddStudentCommand = new RelayCommand(() => { IsNewStudentOpen = true; });
RemoveClassCommand = new RelayCommand<Class>(c => RemoveClass(c));
_repository = new StudentRepository();
IList<Student> allStudents = _repository.GetAll();
if (allStudents != null)
{
AllStudents = new ObservableCollection<Student>(allStudents.OrderBy(s => s.LastName).ThenBy(s => s.FirstName));
SelectedStudent = AllStudents.FirstOrDefault();
}
}
catch(Exception e)
{
System.IO.File.AppendAllText(@"C:\log.txt", string.Format("{0}\r\n{1}", e.Message, e.StackTrace));
}
}
public void RemoveClass(Student selectedStudent, Class selectedClass)
{
if (selectedStudent == null || selectedClass == null)
return;
if (selectedStudent.Classes.Contains(selectedClass))
{
selectedStudent.Classes.Remove(selectedClass);
_entities.SaveChanges();
}
}
public void AddClass(Student SelectedStudent, DateTime SelectedDate)
{
if (SelectedStudent.Classes.Any(x => x.ClassTime == SelectedDate))
return;
Class studentClass = new Class()
{
ClassTime = SelectedDate,
Student = SelectedStudent
};
_entities.AddToClasses(studentClass);
_entities.SaveChanges();
}
public static void SetSelectedStudent(DependencyObject obj, Student value)
{
obj.SetValue(SelectedStudentProperty, value);
}
public bool Add(Student student)
{
_entities.AddToStudents(student);
return _entities.SaveChanges() == 1;
}
/// <summary>
/// Create a new Student object.
/// </summary>
/// <param name="id">Initial value of the Id property.</param>
/// <param name="firstName">Initial value of the FirstName property.</param>
/// <param name="lastName">Initial value of the LastName property.</param>
public static Student CreateStudent(global::System.Int32 id, global::System.String firstName, global::System.String lastName)
{
Student student = new Student();
student.Id = id;
student.FirstName = firstName;
student.LastName = lastName;
return student;
}
/// <summary>
/// Deprecated Method for adding a new object to the Students EntitySet. Consider using the .Add method of the associated ObjectSet<T> property instead.
/// </summary>
public void AddToStudents(Student student)
{
base.AddObject("Students", student);
}
private void AddClass()
{
_repository.AddClass(SelectedStudent, SelectedDate);
Student selected = SelectedStudent;
SelectedStudent = null;
SelectedStudent = selected;
}
public void AddNewStudent()
{
if (_repository.Add(NewStudent))
{
AllStudents.Add(NewStudent);
NewStudent = new Student();
RaisePropertyChanged("NewStudent");
}
IsNewStudentOpen = false;
}
