//
 // GET: /Expense/Create
 public ActionResult Create()
 {
     var vm = new CreateExpenseViewModel
     {
         Date = DateTime.Now,
         Categories = this.categoryService.GetCategories(),
         Users = this.userService.GetUsers()
     };
     return View(vm);
 }
 public ActionResult Create(CreateExpenseViewModel model)
 {
     if (ModelState.IsValid)
     {
         var command = new CreateExpenseCommand
         {
             Amount = model.Amount, Date = model.Date, Shop = model.Shop,
             ExpenseType = model.ExpenseType, Owner = model.Owner
         };
         this.invoker.Execute(command);
         return RedirectToAction("Index");
     }
     model.Categories = this.categoryService.GetCategories();
     model.Users = this.userService.GetUsers();
     return View(model);
 }