c# - 包含二维集合中的方法

Question

如何通过“Name”字段比较 cars 数组中的 auto[0]？字符串 if (!cars.Contains(auto[0])) 当然不正确。

namespace AutoSqare
{
    class CarsInfo
    {
        static List<Tech> cars = new List<Tech>();
        public class Tech
        {
            public string Name { get; set; }
            public double KM { get; set; }
        }
        static void Main()
        {
            string[] auto = new string[]{"Lada Vesta"};
            cars.Add(new Tech()
            {
                    Name = "Lada Vesta Sport",
                    KM = 190
            });

            if (!cars.Contains(auto[0]))
            cars.Add(new Tech()
            {
                    Name = auto[0],
                    KM = 0
            });

        }
    }
}

Answer 1

您可以使用 LINQ 的 Any()方法:

if (!cars.Any(c => c.Name == auto[0]))

但是您似乎打算只使用唯一 汽车名称，所以使用 Dictionary<string,Tech>似乎比 List<Tech> 好:

static Dictionary<string, Tech> cars = new Dictionary<string,Tech>();

static void Main()
{
    string[] auto = new string[]{"Lada Vesta"}; // <-- you also had a syntax error here
    Tech tech = new Tech()
        {
            Name = "Lada Vesta Sport",
            KM = 190
        };
    cars.Add(tech.Name, tech);        

    if (!cars.ContainsKey(auto[0]))  // <--- Use ContainsKey here
        cars.Add(auto[0], new Tech()
            {
                Name = auto[0],
                KM = 0
            });
}