将数据从对象列表插入到C#上的数组中

Question

我有一个对象的列表。该对象表示一个点，其中一条线 og 停放的汽车位于某个位置以及汽车指向的方向。该对象包含多种类型的数据，这些数据也充当属性。列表中有 4 个。这是它们的类型和变量名。

public enum Direction
{
    North,
    West,
    South,
    East
};

public class Location
{
    public Int16 X {set; get;}
    public Int16 Y {set; get;}
    public Direction Z {set; get;}
}

我要做的是测试我的程序是否运行良好。我打算通过将所有“X”放在一个数组中并将它们显示在控制台窗口上来测试它。我正在使用 WPF 和后台线程处理来完成所有工作。关于我如何做的任何想法或建议？我一直在尝试几种方法，例如 Linq 中的 To.Array()，但结果总是我用来包含数据的新数组为空。

Answer 1

我不确定你是否想要 List 或 ArrayList 等。所以我提供了最简单的 Linq。确保使用 System.Collections.Generic 添加；

class Program
{
    public enum Direction { North, East, South, West };
    static List<Location> myObjects = new List<Location>();


    public class Location
    {
        public Int16 X { get; set; }
        public Int16 Y { get; set; }
        public Direction  Z { get; set; }

        public Location(Int16 x, Int16 y, Direction z)
        {
            X = x;
            Y = y;
            Z = z;

        }

    }
    static void Main(string[] args)
    {
        myObjects.Add(new Location(10, 10, Direction.North));
        myObjects.Add(new Location(30, 20, Direction.East));
        myObjects.Add(new Location(50, 5, Direction.West));
        myObjects.Add(new Location(60, 32, Direction.South));

        foreach (Location it in myObjects)
        {
            Console.WriteLine("Parked Location is {0}, X is {1}, Y is {2}", it.Z, it.X, it.Y);
        }

    }
}

Answer 2

如果你想收集所有可以使用的 X 点：

 List<Location> allLocations = ...;

 var allX = from loc in allLocations select loc.X;
 foreach(int i in allX) 
 {
    Console.WriteLine(i);
 }
 var asAnArray = allX.ToArray();

---

完整代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication4
{
    class Program
    {
        public enum Direction
        {
            North,
            West,
            South,
            East
        };

        public class Location
        {
            public Int16 X { set; get; }
            public Int16 Y { set; get; }
            public Direction Z { set; get; }
        }

        static void Main()
        {
            List<Location> allLocations = new List<Location> {
                new Location() {X=1, Y=2, Z = Direction.North },
                new Location() {X=2, Y=3, Z = Direction.West },
                new Location() {X=3, Y=4, Z = Direction.East }
            };
            var allX = from loc in allLocations select loc.X;
            foreach (int i in allX)
            {
                Console.WriteLine(i);
            }
            var asAnArray = allX.ToArray();
            Console.WriteLine("Array is:" + (asAnArray == null ? "Null" : asAnArray.Length.ToString()));
            Console.ReadLine();

            // Or using a different syntax for the same effect.
            asAnArray = allLocations
                .Select(loc => loc.X)
                .ToArray();
            Console.WriteLine("Array is:" + (asAnArray == null ? "Null" : asAnArray.Length.ToString()));
            Console.ReadLine();
        }
    }
}