MvcMusicStore.ViewModels.ShoppingCartFactory.

The ShoppingCart class would have all the entity logic.

The ShoppingCart factory would create a new shopping cart using an HttpContext or Controller. The context and controller concepts have not business in the Model layer. Another alternative is to add the shopping cart factory static methods to the ShoppingCartViewModel class.

it seems that it does not run at all?

Anyone got any ideas please? This is really bugging me as I've actually stopped, deleted and rebuilt the entire project up to this point to try and get past this, and I'm getting the same error. :(

// Perform the ajax post

$.post("/ShoppingCart/RemoveFromCart", { "id": recordToDelete },

it should be:

$.post("/MvcMusicStore/ShoppingCart/RemoveFromCart", { "id": recordToDelete },

Good catch. The right way to do it is

$.post("@Url.Content("~/ShoppingCart/RemoveFromCart")", { "id": recordToDelete },

That way, if you name your application MusicStore instead of MvcMusicStore, it will still work.

return storeDB.Carts.Include("Album").Where(

c => c.CartId == ShoppingCartId).ToList();

if you don't inclde the Album then you get a nullref execption when adding to the cart.

Great serise so far.

Thanks

Chris

Just wanted to let you know there is a problem in a couple of the pages, they use "jquery-1.4.4.min.js" rather than the version in the project/solution (jquery-1.5.1.min.js)

again.. thanks for the effort you put into this.

"System.InvalidOperationException: The sequence contains no elements."

for this part of my code:

// Get the name of the album to display confirmation

string albumName = storeDB.Carts.Single(item => item.RecordId == id).Album.Title;

Can anybody explain the necessity of ShoppingCart class here? I am just wondering why can't we make use of "Cart" class to do all the shopping cart jobs ?

It might be the best approach but my poor brain keeps asking this question.

Cheers,

1) It's easy to not notice, in the ActionLink for the Store Details, the differences between "Add To Cart" and "AddToCart" (no spaces) and the same for "Shopping Cart" and "ShoppingCart". That creates problems. Something like that ought to be emphasized.

2) The Details method of the StoreController doesn't work; I called

var album = storeDB.Albums.Find(id);

and when the Details.cshtml tried to render, I received a NRE. I changed it to this:

var album = storeDB.Albums.Include("Artist").Include("Genre").Single(a => a.AlbumId == id);

and it worked.

However, this, to me, shows the flaws in trusting EF too much. This, combined with the reliance on allowing the code to BUILD your seed data in the first place (i.e., there's too much going on behind the scenes with no clear explanation), gives me pause, and I would prefer to use sprocs instead.

1. The operand of an increment or decrement operator must be a variable, property or indexer

2. Operator '>' cannot be applied to operands of type 'method group' and 'int'

3. Cannot convert type 'method group' to 'int?'

4. Cannot convert method group 'Count' to non-delegate type 'int'. Did you intend to invoke the method?

5. 'MvcMusicStore.Models.Cart' does not contain a definition for 'Count'

This is embarrassing, but I found out that one of the properties I was supposed to add to Cart.cs was

public int Count { get; set; }

Did that, and the program compiled like a breeze.

Thanks.

new { controller = "Home", action = "Index", id = -1 } and the debugger shows me -1 is passed to RemoveFromCart() but that doesn't help solve the problem

<script src="/Scripts/jquery-1.4.4.min.js" type="text/javascript"></script>

in /View/ShoppingCart/Index.cshtml

It already in /Shared/_Layout.cshtml

System.NullReferenceException: Object reference not set to an instance of an object.

On this line: (line 53) @foreach (var item in Model.CartItems)

of ShoppingCart/Index.cshtml. I've copied the code exactly as it is from the example, so I'm not very confident in assessing what I've done wrong. Any help would be appreciated.

And it was pointing at @foreach (var item in Model.CartItems), saying that did not exist.

My line 1 in that file was wrong. It generated

@model IEnumerable<CompareHerdmindData.ViewModels.ShoppingCartViewModel>

But should have been

@model CompareHerdmindData.ViewModels.ShoppingCartViewModel

System.NullReferenceException: Object reference not set to an instance of an object.

On this line: (line 53) @foreach (var item in Model.CartItems)

Solution: Here I am missing the Index function in shoppingCartcontroller, return the viewmodel , as return view(viewModel);

Thanks,

ck