Why is this cart index view (Razor engine) giving me errors - asp.net-mvc

Question

It does not seem to like #{index++;} , I have tried
#{int index++}, #(index++), #(int index++;)
This code didn't throw errors when used with MVC 2.
Here's it's giving me
ambiguity warnings about index.
#model CartTest.Models.Cart
#{
ViewBag.Title = "Index";
}
<h2>Cart Index</h2>
<table width="80%" align="center">
<thead><tr>
<th align="center">Quantity</th>
<th align="left">Item</th>
<th align="right">Price</th>
<th align="right">Subtotal</th>
</tr></thead>
<tbody>
#{int index = 0;}
#foreach (var line in Model.Lines)
{
<tr>
#Html.Hidden("Lines.Index", index);
<td align="center">#Html.TextBox("Lines[" + index + "].Quantity",line.Quantity)</td>
<td align="left">#line.Product.Name</td>
<td align="right">#line.Product.Price</td>
<td align="right">#(line.Quantity * line.Product.Price)</td>
<td align="right">#Html.ActionLink("Remove", "RemoveItem", new { productId = line.Product.ProductID }, null)</td>
</tr>
#{index++;}
}
</tbody>
<tfoot>
</tfoot>
</table>

Answer 1

Try like this:
#{int index = 0;}
#foreach (var line in Model.Lines)
{
<tr>
...
</tr>
index++;
}
Now that's just to make the Razor compiler happy. It's not a solution I recommend. The real solution I would recommend you is to use editor templates:
<table width="80%" align="center">
<thead>
<tr>
<th align="center">Quantity</th>
<th align="left">Item</th>
<th align="right">Price</th>
<th align="right">Subtotal</th>
</tr>
</thead>
<tbody>
#Html.EditorFor(x => x.Lines)
</tbody>
<tfoot>
</tfoot>
</table>
and inside the corresponding editor template of a Line (~/Views/Shared/EditorTemplates/LineViewModel.cshtml) which will be rendered for each element of the Line collection:
#model LineViewModel
<td align="center">
#Html.TextBoxFor(x => x.Quantity)
</td>
<td align="left">
#Html.DisplayFor(x => x.Product.Name)
</td>
<td align="right">
#Html.DisplayFor(x => x.Product.Price)
</td>
<td align="right">
#Html.DisplayFor(x => x.CalculatedTotalPrice)
</td>
<td align="right">
#Html.ActionLink("Remove", "RemoveItem", new { productId = Model.Product.ProductID }, null)
</td>
See, no more ugly loops, weakly typed helpers, dealing with some indexes, etc... Everything works by conventions.