如何用循环批量实例化并命名C#对象，替代重复实例化代码？

我已经手动实现了创建多个Location对象的功能（代码如下），但如果要实例化900个对象，不想重复写900行代码，希望用循环批量创建，同时保留通过对象名称直观调用的功能。目前尝试的两种写法都报错，求解决办法。

成功的手动实现代码 #

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace TextLooter
{
    public class Location
    {
        public int positionA;
        public int positionB;

        public Location(int aPositionA, int aPositionB)
        {
            positionA = aPositionA;
            positionB = aPositionB;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            
            Location city = new Location(1, 1);
            Location park = new Location(2, 2);
            Location town = new Location(3,3);
            Location woods = new Location(4, 4);
            Location meadow = new Location(5, 5);
            Location mountain = new Location(6, 6);
            Location temple = new Location(7, 7);
            Location circus = new Location(8, 8);
            Location gym = new Location(9, 9);
            
            Location location = new Location(0, 0);

            location = park;

            Console.WriteLine(location.positionA + ":" + location.positionB);

            Console.ReadLine();
        }
    }
}

失败的尝试及报错 #

尝试1 #

string[] locations = { "city", "park", "town", "woods", "meadow", "mountain", "temple", "circus", "gym" };

int i = 1;
while (i < 10)
{
    Location locations[i] = new Location(i, i);
    i++;
}

报错：CS0136：无法在该作用域中声明名为“locations”的局部变量或参数。

尝试2 #

string[] locations = { "city", "park", "town", "woods", "meadow", "mountain", "temple", "circus", "gym" };

int i = 1;
while (i < 10)
{
    Location (locations[i]) = new Location(i, i);
    i++;
}

报错：CS1955：不能将Location用作方法。

解决方案 #

C#是静态类型语言，无法在运行时动态创建局部变量名称，但可以用Dictionary<string, Location>来实现“通过名称直观调用”的需求，既可以循环批量创建，又能通过键名（对象名称）快速访问对象。

修改后的代码示例：

using System;
using System.Collections.Generic;

namespace TextLooter
{
    public class Location
    {
        public int positionA;
        public int positionB;

        public Location(int aPositionA, int aPositionB)
        {
            positionA = aPositionA;
            positionB = aPositionB;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            // 定义所有位置名称
            string[] locationNames = { "city", "park", "town", "woods", "meadow", "mountain", "temple", "circus", "gym" };
            // 创建字典存储名称和对应的Location对象
            Dictionary<string, Location> locationDict = new Dictionary<string, Location>();

            // 循环批量实例化并添加到字典
            for (int i = 0; i < locationNames.Length; i++)
            {
                // 位置编号从1开始，对应i+1
                locationDict[locationNames[i]] = new Location(i + 1, i + 1);
            }

            // 通过名称调用对象，和之前的直接变量调用效果一致
            Location location = locationDict["park"];
            Console.WriteLine($"{location.positionA}:{location.positionB}");

            Console.ReadLine();
        }
    }
}

失败原因分析 #

1. 尝试1：你已经声明了名为locations的字符串数组，又在循环里试图用Location locations[i]声明同名变量，引发作用域冲突；同时字符串数组无法存储Location对象，类型不匹配。
2. 尝试2：Location (locations[i]) = ...的写法不符合C#语法，编译器会将(locations[i])识别为方法调用参数，因此报错。

扩展到900个对象的处理 #

只需扩展locationNames数组（或从配置文件、数据库读取名称列表），循环逻辑无需修改，字典会自动完成所有对象的存储与访问。

内容的提问来源于stack exchange，提问作者HappyNoodleBoy