// GET: FUnActivitiesListView/Edit/5
        public async Task <IActionResult> Edit(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            var editActivity = await _context.Activities.FindAsync(id);

            if (editActivity == null)
            {
                return(NotFound());
            }

            var activityTypes = await _context.ActivityTypes.ToListAsync();

            var userGroups = await _context.UserGroups.ToListAsync();

            var vm = new EditFUnActivityViewModel()
            {
                FUnActivity         = editActivity,
                ActivityTypeOptions = activityTypes.Select(a => new SelectListItem
                {
                    Value = a.Id.ToString(),
                    Text  = a.Type
                }).ToList(),
                UserGroupOptions = userGroups.Select(u => new SelectListItem
                {
                    Value = u.Id.ToString(),
                    Text  = u.Name
                }).ToList()
            };

            return(View(vm));
        }
        public async Task <IActionResult> Edit(int id, EditFUnActivityViewModel vm)
        {
            if (id != vm.FUnActivity.Id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(vm.FUnActivity);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!FUnActivityExists(vm.FUnActivity.Id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(vm.FUnActivity));
        }