// GET: Activity/Create/IdProject
        public ActionResult Create(int id)
        {
            if (id <= 0)
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

            ViewBag.ActivityTypes = db.ActivityTypes.ToList();
            ViewBag.MemberList = db.Projects.Where(p => p.ProjectID == id).SelectMany(p => p.ApplicationUsers).ToList();

            var model = new CreateActivityViewModel
            {
                ProjectId = id
            };

            return View(model);
        }
        public async Task<ActionResult> Create(CreateActivityViewModel model)
        {

            if (ModelState.IsValid)
            {
                var userId = User.Identity.GetUserId();
                ApplicationUser user = null;
                if (model.User != null)
                {
                    user = await db.Users.FirstAsync(u => u.Id == model.User);
                }


                var activity = new Activity
                {
                    Name = model.Name,
                    ActivityType = await db.ActivityTypes.FindAsync(model.ActivityType),
                    CreationDate = DateTime.Now,
                    AssignedUser = user,
                    Project = await db.Projects.FirstAsync(p => p.ProjectID == model.ProjectId),
                    WorkingTime = model.WorkingTime,
                    Creator = await db.Users.FirstAsync(u => u.Id == userId),
                    ActivityStatus = Core.Models.ActivityStatus.Created
                };

                db.Activities.Add(activity);
                await db.SaveChangesAsync();
                return RedirectToAction("Details", "Projects", new { id = model.ProjectId });
            }

            ViewBag.ActivityTypes = db.ActivityTypes.ToList();
            ViewBag.MemberList = db.Projects.Where(p => p.ProjectID == model.ProjectId).SelectMany(p => p.ApplicationUsers).ToList();
            return View(model);
        }