用实体框架和ASP.NET MVC在一个页面上更新多个实体(同一类型)的最干净方法是什么?

创建编辑模型:

public class ProductEdit
{
    public int ProductId { get; set; }
    public string Name { get; set; }
    public int Quantity { get; set; }
}

投射到模型上进行显示:

[AcceptVerbs(HttpVerbs.Get)]
public Checkout(int cartId) 
{
    var model = (from c in Repository.Where(c.Id == cartId)
                 from p in c.Products
                 select new ProductEdit
                 { 
                     ProductId = p.ProductId,
                     Name = p.Name,
                     Quantity = p.Quantity
                 }).First();
    return View(model);
}

表单需要使用特定的名称格式绑定到列表:

<% int i = 0; foreach(var product in Model.Products) { %>
<p>
    <%= Html.Hidden(string.Format("products[{0}].ProductId", i), product.ProductId) %>
    <%= Html.Encode(product.Name) %>
    <%= Html.TextBox(string.Format("products[{0}].Quantity", i), product.Quantity) %>
</p>
<% i++; } >

在发布时绑定到模型:

[AcceptVerbs(HttpVerbs.Post)]
public ActionResult CheckOut(int cartId, IEnumerable<ProductEdit> products) 
{
    // update products repository
}