public async Task <IActionResult> Enroll(int courseid)
{
var course = _context.Course.Where(s => s.Id == courseid).Include(m => m.Students).Include(c => c.FirstTeacher)
.Include(c => c.SecondTeacher).First();
if (course == null)
{
return(NotFound());
}
IEnumerable <Student> students = _context.Student.AsEnumerable();
students = students.OrderBy(s => s.FullName);
AddStudentVM viewmodel = new AddStudentVM
{
Course = course,
SelectedStudents = course.Students.Select(c => c.StudentId),
StudentList = new MultiSelectList(students, "Id", "FullName"),
Year = 0
};
ViewData["FirstTeacherId"] = new SelectList(_context.Set <Teacher>(), "Id", "FullName", course.FirstTeacherId);
ViewData["SecondTeacherId"] = new SelectList(_context.Set <Teacher>(), "Id", "FullName", course.SecondTeacherId);
return(View(viewmodel));
}
public async Task <IActionResult> Enroll(int id, AddStudentVM viewmodel)
{
if (id != viewmodel.Course.Id)
{
return(NotFound());
}
if (ModelState.IsValid)
{
try
{
_context.Update(viewmodel.Course);
await _context.SaveChangesAsync();
IEnumerable <long> listStudents = viewmodel.SelectedStudents;
IQueryable <Enrollment> toBeRemoved = _context.Enrollment.Where(s => !listStudents.Contains(s.StudentId) && s.CourseId == id);
_context.Enrollment.RemoveRange(toBeRemoved);
IEnumerable <long> existStudents = _context.Enrollment.Where(s => listStudents.Contains(s.StudentId) && s.CourseId == id).Select(s => s.StudentId);
IEnumerable <long> newStudents = listStudents.Where(s => !existStudents.Contains(s));
foreach (long studentId in newStudents)
{
_context.Enrollment.Add(new Enrollment
{
StudentId = studentId,
CourseId = id,
Semester = viewmodel.Semester,
Year = viewmodel.Year,
Grade = 0,
SeminalUrl = "",
ProjectUrl = "",
ExamPoints = 0,
SeminalPoints = 0,
ProjectPoints = 0,
AdditionalPoints = 0,
FinishDate = DateTime.Parse("2000-1-01")
});
}
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!CourseExists(viewmodel.Course.Id))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToAction(nameof(Index)));
}
ViewData["CourseId"] = new SelectList(_context.Course, "Id", "Title", viewmodel.Course.Id);
//ViewData["StudentId"] = new SelectList(_context.Student, "Id", "FullName", viewmodel.Enrollment.StudentId);
return(View(viewmodel));
}
public ActionResult Enroll()
{
var model = new AddStudentVM
{
Courses = this.service.GetAllCourses()
};
string userName = this.User.Identity.Name;
return(this.View(model));
}
