public async Task <IActionResult> Edit(int id, [Bind("GroupHandinId,AssignmentId,Grade,GroupId,TeacherAuId")] GroupHandin groupHandin)
        {
            if (id != groupHandin.GroupHandinId)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(groupHandin);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!GroupHandinExists(groupHandin.GroupHandinId))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["AssignmentId"] = new SelectList(_context.Assignment, "AssignmentId", "AssignmentName", groupHandin.AssignmentId);
            ViewData["GroupId"]      = new SelectList(_context.Group, "GroupId", "GroupId", groupHandin.GroupId);
            ViewData["TeacherAuId"]  = new SelectList(_context.Teachers, "TeacherAuId", "FirstName", groupHandin.TeacherAuId);
            return(View(groupHandin));
        }
        public async Task <IActionResult> Create([Bind("GroupHandinId,AssignmentId,Grade,GroupId,TeacherAuId")] GroupHandin groupHandin)
        {
            if (ModelState.IsValid)
            {
                _context.Add(groupHandin);
                await _context.SaveChangesAsync();

                return(RedirectToAction(nameof(Index)));
            }
            ViewData["AssignmentId"] = new SelectList(_context.Assignment, "AssignmentId", "AssignmentName", groupHandin.AssignmentId);
            ViewData["GroupId"]      = new SelectList(_context.Group, "GroupId", "GroupId", groupHandin.GroupId);
            ViewData["TeacherAuId"]  = new SelectList(_context.Teachers, "TeacherAuId", "FirstName", groupHandin.TeacherAuId);
            return(View(groupHandin));
        }