首先找到要在列表中排序的字段，对列表进行排序

Question

这似乎很困难，并将感谢任何帮助或帮助，一个人可能能够提供。

我有一份名单，清单。每个汽车对象都有一个列表，列表。我想把我的汽车清单按这些配件中的一个分类。在我的例子中，我保证有几个带有我要找的附件的汽车物体。

现在我知道了附件名，但是我不知道使用什么语法来对附件名上的汽车列表进行排序。

• AccessoryObj1 =>名称(String:动态引导)
• AccessoryObj2 =>名称(字符串:侧协助)
• Car1 -> List (AccessoryObj1，AccessoryObj2，AccessoryObj3)
• Car2 -> List (AccessoryObj1，AccessoryObj2，AccessoryObj3)

列表(Car1，Car2)

我尝试的语法如下：

String sortField = "Side Assist";
List<Car> sortedList = sortedList.OrderBy(
                        x => x.Accessories.OfType<Accessory>().ToList().First(y => y.Name == sortField)).ToList();

我试图通过引用每个Car对象的附件列表，并在附件列表中的附件对象名称与sortField值匹配的第一个匹配项，来提高我的汽车列表。

不幸的是，此尝试导致以下错误：

至少有一个对象必须实现IComparable

我希望我的问题足够清楚，提前感谢。

感谢user2399170提供的解决方案，我的方法是3/4 :取他们的解决方案/样本，我现在正在尝试将最终结果排序为“上升/下降”。下面是调整后的代码：

public class Accessory
{
    public string Name { get; set; }
    public string Value { get; set; }
}

public class Car
{
    public string Name { get; set; }
    public IList<Accessory> Accessories { get; set; }
}

private IEnumerable<Car> GetCars()
    {
        var cars = new List<Car>();
        cars.Add(
            new Car()
            {
                Name = "CAR1",
                Accessories = new List<Accessory>()
                {
                    new Accessory() { Name = "ABS Brakes", Value = "1" },
                    new Accessory() { Name = "Airbag", Value = "1" },
                    new Accessory() { Name = "Climate Control", Value = "1" },
                    new Accessory() { Name = "Heated Seats", Value = "1" },
                    new Accessory() { Name = "HID Xenon Headlights", Value = "1" },
                    new Accessory() { Name = "Radio", Value = "1" },
                    new Accessory() { Name = "Quattro", Value = "0" },
                    new Accessory() { Name = "Sat/Nav", Value = "1" },
                    new Accessory() { Name = "Side Assist", Value = "0" },
                    new Accessory() { Name = "Name", Value = "BMW" },
                }
            });
        cars.Add(
            new Car()
            {
                Name = "CAR2",
                Accessories = new List<Accessory>()
                {
                    new Accessory() { Name = "ABS Brakes", Value = "1" },
                    new Accessory() { Name = "Airbag", Value = "1" },
                    new Accessory() { Name = "Climate Control", Value = "1" },
                    new Accessory() { Name = "Heated Seats", Value = "0" },
                    new Accessory() { Name = "HID Xenon Headlights", Value = "0" },
                    new Accessory() { Name = "Radio", Value = "1" },
                    new Accessory() { Name = "Quattro", Value = "0" },
                    new Accessory() { Name = "Sat/Nav", Value = "0" },
                    new Accessory() { Name = "Side Assist", Value = "0" },
                    new Accessory() { Name = "Name", Value = "Mazda" },
                }
            });
        cars.Add(
            new Car()
            {
                Name = "CAR3",
                Accessories = new List<Accessory>()
                {
                    new Accessory() { Name = "ABS Brakes", Value = "1" },
                    new Accessory() { Name = "Airbag", Value = "1" },
                    new Accessory() { Name = "Climate Control", Value = "1" },
                    new Accessory() { Name = "Heated Seats", Value = "1" },
                    new Accessory() { Name = "HID Xenon Headlights", Value = "1" },
                    new Accessory() { Name = "Radio", Value = "1" },
                    new Accessory() { Name = "Quattro", Value = "1" },
                    new Accessory() { Name = "Sat/Nav", Value = "1" },
                    new Accessory() { Name = "Side Assist", Value = "1" },
                    new Accessory() { Name = "Name", Value = "Audi" },

                }
            });

        String[] sortRules = new string[] { "Name" };

        List<Car> sortedCars = sortRules
            .SelectMany(sortRule => cars.Where(car => car.Accessories.Any(acc => acc.Name == sortRule)))
            .Distinct().ToList();

        return sortedCars;
    }

我想根据排序字段'Name‘的值对最终结果进行排序，在这个示例中，"Audi“、"BMW”、"Mazda“

这一切是如何工作的，用户可以从下拉“Name”中选择，结果可以按照“name”的值进行排序。不幸的是，这就是我无法控制的第三方源返回数据的方式。

Answer 1

试试看这个样本

private static IEnumerable<Car> GetCars(string filterByAccessory, bool sortAscending = true)
{
    var cars = new List<Car>();
    cars.Add(
        new Car()
        {
            Name = "CAR1",
            Accessories = new List<Accessory>()
        {
            new Accessory() { Name = "ABS Brakes", Value = "1" },
            new Accessory() { Name = "Airbag", Value = "1" },
            new Accessory() { Name = "Climate Control", Value = "1" },
            new Accessory() { Name = "Heated Seats", Value = "1" },
            new Accessory() { Name = "HID Xenon Headlights", Value = "1" },
            new Accessory() { Name = "Radio", Value = "1" },
            new Accessory() { Name = "Quattro", Value = "0" },
            new Accessory() { Name = "Sat/Nav", Value = "1" },
            new Accessory() { Name = "Side Assist", Value = "0" },
            new Accessory() { Name = "Name", Value = "BMW" },
        }
        });
    cars.Add(
        new Car()
        {
            Name = "CAR2",
            Accessories = new List<Accessory>()
        {
            new Accessory() { Name = "ABS Brakes", Value = "1" },
            new Accessory() { Name = "Airbag", Value = "1" },
            new Accessory() { Name = "Climate Control", Value = "1" },
            new Accessory() { Name = "Heated Seats", Value = "0" },
            new Accessory() { Name = "HID Xenon Headlights", Value = "0" },
            new Accessory() { Name = "Radio", Value = "1" },
            new Accessory() { Name = "Quattro", Value = "0" },
            new Accessory() { Name = "Sat/Nav", Value = "0" },
            new Accessory() { Name = "Side Assist", Value = "0" },
            new Accessory() { Name = "Name", Value = "Mazda" },
        }
        });
    cars.Add(
        new Car()
        {
            Name = "CAR3",
            Accessories = new List<Accessory>()
        {
            new Accessory() { Name = "ABS Brakes", Value = "1" },
            new Accessory() { Name = "Airbag", Value = "1" },
            new Accessory() { Name = "Climate Control", Value = "1" },
            new Accessory() { Name = "Heated Seats", Value = "1" },
            new Accessory() { Name = "HID Xenon Headlights", Value = "1" },
            new Accessory() { Name = "Radio", Value = "1" },
            new Accessory() { Name = "Quattro", Value = "1" },
            new Accessory() { Name = "Sat/Nav", Value = "1" },
            new Accessory() { Name = "Side Assist", Value = "1" },
            new Accessory() { Name = "Name", Value = "Audi" },

        }
        });

    var filteredCars = cars.Where(c => c.Accessories.Any(a => a.Name == filterByAccessory));

    var sortedCars = sortAscending
        ? filteredCars.OrderBy(x => x.Accessories.First(a => a.Name == filterByAccessory).Value)
        : filteredCars.OrderByDescending(x => x.Accessories.First(a => a.Name == filterByAccessory).Value);

    return sortedCars;
}

Answer 2

要按Accessory进行排序，需要确保类实现了IComparable接口

public class Accessory : IComparible
{
    public int CompareTo(object obj) {
        //Return 0 for equals
        //Return -1 if this object precedes the given object
        //Return 1 if this object follows the given object
    }
}