foreach loop loosing scope中的orderby

很简单的事情有点麻烦(我希望)

我正在接收一个用于排序的数组。我为按键选择器创建了一个字典。 但我错过了最后一块 ThenBy 或者每次都重新订购。

public List<Vehicle> OrderBy(string[] sorting, List<Vehicle> vehicles)
{
    return Order(sorting, vehicles, SortingFiltersVehicle);
}

//this is a generic implementation
private List<T> Order<T>(string[] sorting, List<T> vehicles, IDictionary<string, Func<T, object>> filters)
{
    if (!sorting.HasAnyValue())
        return vehicles;

    foreach (var orderby in sorting)
    {
        var key = orderby.Split("-")[0];
        if (filters.ContainsKey(key.Trim()))
        {
            var direction = orderby.Contains("desc") ? OrderByDirection.Descending : OrderByDirection.Ascending;
            vehicles = vehicles.OrderBy(filters[key], direction).ToList(); <== here is the problem
        }
    }

    return vehicles;
}

private static readonly IDictionary<string, Func<Vehicle, object>> SortingFiltersVehicle = new Dictionary<string, Func<Vehicle, object>>
{
    { "price", v => v.DiscountedPrice },
    { "make", v => v.Make },
    { "model", v => v.Model },
    { "trimline", v => v.Trimline },
};