5 comments

• 

  Love the cast. Its very informative and interesting. Good work Mike pls keep it up!

  • 

    Thanks Frank! Much appreciated.

• 

  Hi Michael,

  Happy Holidays from Las Vegas !
  Very instructive hands-on tutorial for MVC Forms.

  A small beef is the unresolved issue with model binding validation for the ( [Required] ) dropdownlist. Sorry it didn’t work out of the box and you mentioned about manual approach without the required attribute, shouldn’t this work ?

  Best, LA Guy

• 

  Happy Holidays Michael,

  Very nice job with a hands-on walkthrough covering the basic concepts. :)

  As usual, there is a dearth of in-depth videos which cover topics such as below.

  Hope you can comment on how to do Required DropdownList validation using the [Required] attribute instead of a manual validation on the serverside ( as you mentioned ) ?

  Also, would be nice to cover the many to many example where multiple categories could be
  assigned to a book.

  Best, Paul

• 

  Hi Michael,

  Just in case anyone is interested in getting the Mongo ObjectID ( Guid ) working with the dropdown, then the ViewModel should use a String for the CategoryId and then convert to Mongo
  ObjectID

  +++ VIEWMODEL
  public class BookViewModel
  {
  //public ObjectId CategoryId { get; set; }
  [Required]
  public string CategoryId { get; set; }
  [Required] public string Name { get; set; }
  [Required] public string ImageUrl { get; set; }
  [Required] public float Price { get; set; }
  }

  +++ VIEW

  @using(Html.BeginForm())
  {

  Category: @Html.DropDownListFor(m => m.CategoryId, categories)
  Title: @Html.TextBoxFor(m => m.Name)
  Image Url: @Html.TextBoxFor(m => m.ImageUrl)
  Price: @Html.TextBoxFor(m => m.Price)

  }

  +++ CONTROLLER ACTION

  [HttpPost]
  public ActionResult AddBook(BookViewModel viewModel)
  {
  if (!ModelState.IsValid)
  {
  ViewBag.CategoriesList = GetCategoriesList();
  return View(viewModel);
  }

  Book book = new Book();

  book.CategoryId = new ObjectId(viewModel.CategoryId); // viewModel.CategoryId;
  book.Name = viewModel.Name;
  book.Price = viewModel.Price;
  book.ImageUrl = viewModel.ImageUrl;

  repository.Save(book);

  return Redirect(“/books/show/” + book._id);
  }

  Merry Xmas, Paul