void UpdateSubjects()
{
using (_ujc = new UniversityEntities())
{
_subjects = (from subj in _ujc.University_Subject
select subj).ToList();
RaisePropertyChanged("Subjects");
}
}
private void DeleteStudentFromDB(University_Student obj)
{
_ujc = new UniversityEntities();
var removestud = _ujc.University_Student.Single((s) => s.Student_ID == SelectedStudent.Student_ID);
_ujc.University_Student.Remove(removestud);
_ujc.SaveChanges();
UpdateStudentsList();
}
private void UpdateStudent(object parameter)
{
using (_ujc = new UniversityEntities())
{
//try
{
University_Student tmp = _ujc.University_Student.Single((st) => st.Student_ID == SelectedStudent.Student_ID);
tmp.First_Name = StudentName;
tmp.Last_Name = StudentLastName;
tmp.Birthday = StudentBirthdate;
tmp.Email = StudentEmail;
if (StudentPhoto!=null)
{
tmp.Photo = ImageToByte(StudentPhoto);
}
else tmp.Photo = ImageToByte(new BitmapImage(new Uri(@"G:\Универ\GoogleDrive_oldan\Bionic Final Project\UniversityJournal\UniversityJournal\bin\Debug\no_img.jpg")));
_ujc.SaveChanges();
UpdateStudentsList();
CloseCommand();
}
//catch
{
}
}
}
void GetCurrentSubjects(University_Group obj)
{
if (obj != null)
{
using (_ujc = new UniversityEntities())
{
var _teach = _ujc.University_Group.Where(s => s.Group_ID == obj.Group_ID).FirstOrDefault();
CurrentSubjects = new ObservableCollection<University_Subject>(_teach.University_Subject.ToList());
}
}
}
void GetCurrentStudents(University_Group obj)
{
if (obj!=null)
{
using (_ujc = new UniversityEntities())
{
var _studs = _ujc.University_Group.Where(gr => gr.Group_ID == obj.Group_ID).FirstOrDefault();
Students = new ObservableCollection<University_Student>(_studs.University_Student.ToList());
}
}
}
private void AddSubjectFromList(University_Subject obj)
{
using (_ujc = new UniversityEntities())
{
var currsubj = _ujc.University_Subject.Where(s => s.Subject_ID == obj.Subject_ID).FirstOrDefault();
var currgroup = _ujc.University_Group.Where(t => t.Group_ID == SelectedGroup.Group_ID).FirstOrDefault();
currgroup.University_Subject.Add(currsubj);
_ujc.SaveChanges();
GetCurrentSubjects(SelectedGroup);
GetAllSubjects();
}
}
private void RemoveStudentFromGroup(University_Student obj)
{
using (_ujc = new UniversityEntities())
{
var currstud = _ujc.University_Student.Where(s => s.Student_ID == obj.Student_ID).FirstOrDefault();
var currgroup = _ujc.University_Group.Where(t => t.Group_ID == SelectedGroup.Group_ID).FirstOrDefault();
currgroup.University_Student.Remove(currstud);
_ujc.SaveChanges();
GetAllStudents();
GetCurrentStudents(SelectedGroup);
}
}
private void UpdateSchedule()
{
using (_ujc=new UniversityEntities())
{
UpdateDaySchedule("Monday", ref _mondayLessons);
UpdateDaySchedule("Tuesday", ref _tuesdayLessons);
UpdateDaySchedule("Wednesday", ref _wednesdayLessons);
UpdateDaySchedule("Thursday", ref _thursdayLessons);
UpdateDaySchedule("Friday", ref _fridayLessons);
RaisePropertyChanged("MondayLessons");
RaisePropertyChanged("TuesdayLessons");
RaisePropertyChanged("WednesdayLessons");
RaisePropertyChanged("ThursdayLessons");
RaisePropertyChanged("FridayLessons");
}
}
public void Refresh()
{
FilterList = new ObservableCollection<University_Group>();
FilterList.Add(new University_Group() { Group_Name = "ALL", Group_ID = 65536 });
using (_ujc = new UniversityEntities())
{
foreach (var gr in _ujc.University_Group.Select(s => s).ToList())
{
FilterList.Add(gr);
}
SelectedFilter = FilterList[0];
}
UpdateSchedule();
}
private void DeleteLessonFromSchedule(Schedule parameter)
{
using (_ujc = new UniversityEntities())
{
var _delLes = _ujc.University_Schedule.Where(s => s.Lesson_ID == parameter.Lesson_ID).FirstOrDefault();
_ujc.University_Schedule.Remove(_delLes);
_ujc.SaveChanges();
}
UpdateSchedule();
}
private void AddLessonToSchedule(object parameter)
{
using (_ujc = new UniversityEntities())
{
var _newLes = new University_Schedule();
_newLes.Day_of_week = SelectedDay;
_newLes.LessonNo = SelectedLessonNo;
_newLes.Group_ID = SelectedGroup.Group_ID;
_newLes.Subject_ID = SelectedSubject.Subject_ID;
_newLes.Teacher_ID = SelectedTeacher.Teacher_ID;
_ujc.University_Schedule.Add(_newLes);
_ujc.SaveChanges();
}
SelectedLessonNo = 0;
RaisePropertyChanged("SelecteLessonNo");
SelectedDay = null;
OnSelectedLessonNo();
UpdateSchedule();
}
private void OnSelectedSubject()
{
if (!string.IsNullOrEmpty(SelectedDay) && SelectedLessonNo > 0 && SelectedLessonNo < 5 && SelectedGroup != null&& SelectedSubject!=null)
{
using (_ujc = new UniversityEntities())
{
var _ss = _ujc.University_Subject.Where(s => s.Subject_ID == SelectedSubject.Subject_ID).FirstOrDefault();
var _exclTchrID = _ujc.University_Schedule
.Where(s=>s.Day_of_week==SelectedDay)
.Where(s=>s.LessonNo==SelectedLessonNo)
.Select(s => s.Teacher_ID);
var _possTchrID = _ss.University_Teacher.Select(s => s.Teacher_ID);
var _availTchrID = _possTchrID.Except(_exclTchrID);
Teachers = new ObservableCollection<University_Teacher>();
foreach (var id in _availTchrID)
{
Teachers.Add(_ujc.University_Teacher.Where(tch => tch.Teacher_ID == id).FirstOrDefault());
}
}
}
}
private void OnSelectedGroup()
{
if (!string.IsNullOrEmpty(SelectedDay)
&& SelectedLessonNo > 0
&& SelectedLessonNo < 5
&& SelectedGroup != null)
{
using (_ujc = new UniversityEntities())
{
var _selgr = _ujc.University_Group
.Where(s => s.Group_ID == SelectedGroup.Group_ID).FirstOrDefault();
var _subjs = _selgr.University_Subject.ToList();
GroupSubjects = new ObservableCollection<University_Subject>(_subjs);
}
}
}
private void OnSelectedLessonNo()
{
if (!string.IsNullOrEmpty(SelectedDay)&&SelectedLessonNo>0&&SelectedLessonNo<5)
{
using (_ujc = new UniversityEntities())
{
AvailableGroups = new ObservableCollection<University_Group>();
var _exclgrID = _ujc.University_Schedule
.Where(s=>s.Day_of_week.Equals(SelectedDay))
.Where(s=>s.LessonNo==SelectedLessonNo)
.Select(s=>s.Group_ID);
var _allgrID = _ujc.University_Group
.Select(s=>s.Group_ID);
var _availgrID = _allgrID.Except(_exclgrID);
foreach (var id in _availgrID)
{
AvailableGroups.Add(_ujc.University_Group.Where(gr => gr.Group_ID == id).FirstOrDefault());
}
}
}
}
private void EditGroupFromDB(University_Group obj)
{
try
{
using (_ujc = new UniversityEntities())
{
var _group = _ujc.University_Group.Where(s => s.Group_ID == obj.Group_ID).FirstOrDefault();
_group.Group_Name = GroupNameEdit;
_ujc.SaveChanges();
}
}
catch { }
finally
{
RefreshIt();
}
}
private void SaveNewTeacherToDB(object obj)
{
try
{
using (_ujc = new UniversityEntities())
{
University_Teacher _teach = new University_Teacher();
_teach.First_Name = Tname;
_teach.Last_Name = Tlname;
_teach.Birthday = Tbdate;
_teach.Email = Temail;
if (Tphoto != null)
{
_teach.Photo = ImageToByte(Tphoto);
}
_teach.Login = Tlogin;
_teach.Password = Tpwd;
_ujc.University_Teacher.Add(_teach);
_ujc.SaveChanges();
}
}
catch { }
finally
{
EditEnabled = false;
AddButtonName = "Add New...";
_addNewTeacher = new Command<object>(AddNewTeacherToDB);
RaisePropertyChanged("AddNewTeacher");
BlockGrid = true;
RefreshIt();
}
}
private void AddNewGroupToDB(string obj)
{
try
{
using (_ujc = new UniversityEntities())
{
University_Group _group = new University_Group();
_group.Group_Name = obj;
_ujc.University_Group.Add(_group);
_ujc.SaveChanges();
}
}
catch { }
finally
{
RefreshIt();
}
}
private void SaveEditedTeacherToDB(University_Teacher obj)
{
try
{
using (_ujc = new UniversityEntities())
{
var _teach = _ujc.University_Teacher.Where(s => s.Teacher_ID == SelectedTeacher.Teacher_ID).Single();
_teach.First_Name = Tname;
_teach.Last_Name = Tlname;
_teach.Birthday = Tbdate;
_teach.Email = Temail;
if (Tphoto != null)
{
_teach.Photo = ImageToByte(Tphoto);
}
_teach.Login = Tlogin;
_teach.Password = Tpwd;
_ujc.SaveChanges();
}
}
finally
{
EditEnabled = false;
EditButtonName = "Edit";
_editTeacher = new Command<University_Teacher>(EditTeacherFromDB, (S) => SelectedTeacher != null);
RaisePropertyChanged("EditTeacher");
AllowAddButton = true;
BlockGrid = true;
RefreshIt();
}
}
private void AddStudentToGroup (University_Student parameter)
{
using (_ujc = new UniversityEntities())
{
var _selstud = _ujc.University_Student.Where(s=>s.Student_ID == parameter.Student_ID).FirstOrDefault();
var _group = _ujc.University_Group.Where(gr => gr.Group_ID == SelectedGroup.Group_ID).FirstOrDefault();
_group.University_Student.Add(_selstud);
_ujc.SaveChanges();
}
GetAllStudents();
GetCurrentStudents(SelectedGroup);
}
private void DeleteTeacherFromDB(University_Teacher obj)
{
try
{
using (_ujc = new UniversityEntities())
{
var _teach = _ujc.University_Teacher.Where(s => s.Teacher_ID == obj.Teacher_ID).FirstOrDefault();
_ujc.University_Teacher.Remove(_teach);
_ujc.SaveChanges();
}
}
finally
{
RefreshIt();
}
}
private void UpdateGroupList()
{
using (_ujc = new UniversityEntities())
{
var tmp = (from gr in _ujc.University_Group
select gr).ToList();
_groups = new ObservableCollection<University_Group>(tmp);
RaisePropertyChanged("Groups");
}
}
private void RemoveSubjectFromList(University_Subject obj)
{
using (_ujc = new UniversityEntities())
{
var currsubj = _ujc.University_Subject.Where(s => s.Subject_ID == obj.Subject_ID).FirstOrDefault();
var currteach = _ujc.University_Teacher.Where(t => t.Teacher_ID == SelectedTeacher.Teacher_ID).FirstOrDefault();
currteach.University_Subject.Remove(currsubj);
_ujc.SaveChanges();
GetCurrentSubjects(SelectedTeacher);
GetAllSubjects();
}
}
void GetAllSubjects()
{
using (_ujc = new UniversityEntities())
{
if (CurrentSubjects != null && SelectedGroup != null)
{
var tmpData = _ujc.University_Subject.ToList();
var teach = _ujc.University_Group.Where(e => e.Group_ID == SelectedGroup.Group_ID).FirstOrDefault();
var exclData = teach.University_Subject.ToList();
var res = tmpData.Except(exclData).ToList();
AllSubjects = new ObservableCollection<University_Subject>(res);
}
}
}
void UpdateTeachersList()
{
using (_ujc = new UniversityEntities())
{
_teachers = (from teac in _ujc.University_Teacher
select teac).ToList();
RaisePropertyChanged("Teachers");
}
}
private void GetAllStudents()
{
AllAvailableStudents = new ObservableCollection<University_Student>();
using(_ujc = new UniversityEntities())
{
var _allStuds = _ujc.University_Student.Select(s => s);
foreach(var stud in _allStuds)
{
if (stud.University_Group.Count==0)
{
AllAvailableStudents.Add(stud);
}
}
}
}
//CONSTRUCTOR
public GroupVM()
{
_deleteGroup = new Command<University_Group>(DeleteGroupFromDB, s => s != null);
_editGroup = new Command<University_Group>(EditGroupFromDB, s => s != null
&& !string.IsNullOrWhiteSpace(GroupNameEdit));
_addNewGroup = new Command<string>(AddNewGroupToDB,
s =>
{
if (!string.IsNullOrWhiteSpace(s))
using(_ujc=new UniversityEntities())
{
var cnt=_ujc.University_Group.Where(gr => gr.Group_Name == s).ToList().Count;
return !(cnt > 0);
}
return false;
});
_addSubject = new Command<University_Subject>(AddSubjectFromList,
s => SelectedGroup != null && s != null
);
_removeSubject = new Command<University_Subject>(RemoveSubjectFromList,
s => SelectedGroup != null && s != null);
_addStudents = new Command<University_Student>(AddStudentToGroup, s => SelectedGroup != null && s != null);
_removeStudents = new Command<University_Student>(RemoveStudentFromGroup, s => SelectedGroup != null && s != null);
RefreshIt();
}
void UpdateStudentsList()
{
using (_ujc = new UniversityEntities())
{
if (!string.IsNullOrEmpty(SearchString))
{
_students = new List<University_Student>();
Regex _sp = new Regex(SearchString+"{1}",RegexOptions.IgnoreCase);
var _tmp = _ujc.University_Student.Select(s => s);
foreach (var it in _tmp)
{
if (_sp.IsMatch(it.Last_Name)||_sp.IsMatch(it.First_Name))
{
_students.Add(it);
}
}
}
else
{
//_students = new List<University_Student>();
_students = _ujc.University_Student
// .Where(s => s.Last_Name.Contains(SearchString))
.Select(s => s)
.ToList();
}
//_students.AddRange(
// _ujc.University_Student
// .Where(s => s.First_Name.Contains(SearchString))
// .ToList()
// );
//(from stud in _ujc.University_Student
// select stud).ToList();
RaisePropertyChanged("Students");
}
}
//Command Methods
private void DeleteGroupFromDB(University_Group obj)
{
try
{
using (_ujc = new UniversityEntities())
{
var _group = _ujc.University_Group.Where(s => s.Group_ID == obj.Group_ID).FirstOrDefault();
_ujc.University_Group.Remove(_group);
_ujc.SaveChanges();
}
}
finally
{
RefreshIt();
}
}
private void AddStudent(object parameter)
{
using (_ujc = new UniversityEntities())
{
try
{
University_Student tmp = new University_Student();
tmp.First_Name = StudentName;
tmp.Last_Name = StudentLastName;
tmp.Birthday = StudentBirthdate;
tmp.Email = StudentEmail;
if (StudentPhoto == null)
tmp.Photo = null;
else
tmp.Photo = ImageToByte(StudentPhoto);
_ujc.University_Student.Add(tmp);
_ujc.SaveChanges();
UpdateStudentsList();
CloseCommand();
}
catch { }
}
}
private void EditSubjectFromDB(University_Subject obj)
{
using (_ujc = new UniversityEntities())
{
var subj = _ujc.University_Subject.Where(s => s.Subject_ID == obj.Subject_ID).FirstOrDefault();
if (subj != null)
{
subj.Subject_Name = CurrentSubject;
_ujc.SaveChanges();
}
UpdateSubjects();
}
}
