//public IList<Instructor> Instructor { get;set; }
public async Task OnGetAsync(int?id, int?courseID)
{
InstructorData = new InstructorIndexData();
InstructorData.Instructors = await _context.Instructors
.Include(i => i.OfficeAssignmnet)
.Include(i => i.Courses)
.ThenInclude(c => c.Department)
.OrderBy(i => i.LastName)
.ToListAsync();
if (id != null)
{
InstructorID = id.Value;
Instructor instructor = InstructorData.Instructors
.Where(i => i.ID == id.Value).Single();
InstructorData.Courses = instructor.Courses;
}
if (courseID != null)
{
CourseID = courseID.Value;
var selectedCourse = InstructorData.Courses
.Where(x => x.CourseID == courseID).Single();
await _context.Entry(selectedCourse)
.Collection(x => x.Enrollments).LoadAsync();
foreach (Enrollment enrollment in selectedCourse.Enrollments)
{
await _context.Entry(enrollment).Reference(x => x.Student).LoadAsync();
}
InstructorData.Enrollments = selectedCourse.Enrollments;
}
}
// To protect from overposting attacks, enable the specific properties you want to bind to.
// For more details, see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync(int id)
{
if (!ModelState.IsValid)
{
return(Page());
}
//_context.Attach(Department).State = EntityState.Modified;
var departmentToUpdate = await _context.Departments
.Include(i => i.Administrator)
.FirstOrDefaultAsync(m => m.DepartmentID == id);
if (departmentToUpdate == null)
{
return(HandleDeletedDepartment());
}
_context.Entry(departmentToUpdate).Property(
d => d.ConcurrencyToken).OriginalValue = Department.ConcurrencyToken;
if (await TryUpdateModelAsync <Department>(departmentToUpdate,
"Department", s => s.Name, s => s.StartDate, s => s.Budget, s => s.InstructorID))
{
try
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
catch (DbUpdateConcurrencyException ex)
{
var exceptionEntry = ex.Entries.Single();
var clientValues = (Department)exceptionEntry.Entity;
var databaseEntry = exceptionEntry.GetDatabaseValues();
if (databaseEntry == null)
{
ModelState.AddModelError(string.Empty, "Unable to save. " +
"The department was deleted by another user.");
return(Page());
}
var dbValues = (Department)databaseEntry.ToObject();
await setDbErrorMessage(dbValues, clientValues, _context);
Department.ConcurrencyToken = (byte[])dbValues.ConcurrencyToken;
ModelState.Remove($"{nameof(Department)}.{nameof(Department.ConcurrencyToken)}");
}
}
InstructorNameSL = new SelectList(_context.Instructors, "ID", "FullName",
departmentToUpdate.InstructorID);
return(Page());
}
