mvc4中包含计数和其他字段的Linq group by查询

public ActionResult GroupByQuery()
{
    var query = from item in db.Items
                group item by item.Category into g
                select new GroupedItem
                {
                    Category = g.Key,
                    Count = g.Count(),
                    TotalPrice = g.Sum(item => item.Price)
                };

    return View(query.ToList());
}

public class GroupedItem
{
    public string Category { get; set; }
    public int Count { get; set; }
    public decimal TotalPrice { get; set; }
}

@model List<GroupedItem>

@foreach (var item in Model)
{
    <p>Category: @item.Category</p>
    <p>Count: @item.Count</p>
    <p>Total Price: @item.TotalPrice</p>
    <hr />
}