在另一个类中发送的 c# 数组发回零

Question

我正在解决一个我最近遇到的问题。我只是想运行一个程序来实例化并显示一个我命名为 HockeyPlayer 的对象。我尝试使用它，数组大小为 20。到目前为止，我所做的一切似乎都在起作用。但是，当我编译并完成输入播放器数据时，列表返回为零。我不太确定这里发生了什么。

这是我的代码:

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

namespace TestHockeyPlayer
{
    class Program
    {
        static void Main(string[] args)
        {
            HockeyPlayer[] players = new HockeyPlayer[20];
            int x;
            string lastName;
            int jerseyNumber;
            int goalsScored;

            for(x = 0; x < players.Length; ++x)
            {
                GetPlayerData(out lastName, out jerseyNumber, out goalsScored);
                players[x] = new HockeyPlayer(lastName, jerseyNumber, goalsScored);
            }

            for(x = 0; x < players.Length; ++x)
            {
                DisplayRoster(players[x]);
            }


        }

        static void DisplayRoster(HockeyPlayer ply)
        {
            WriteLine("{0, 5}{1, -10}{2, 6}", ply.LastName, ply.JerseyNum, ply.Goals);
        }

        static void GetPlayerData(out string lastName, out int jerseyNumber, out int goalsScored)
        {
            string userInput;
            WriteLine("Please enter player's last name >>");
            lastName = ReadLine();
            WriteLine("Please enter the jersey number for {0} >>", lastName);
            userInput = ReadLine();
            int.TryParse(userInput, out jerseyNumber);
            WriteLine("How many goals has {0} scored? >>", lastName);
            userInput = ReadLine();
            int.TryParse(userInput, out goalsScored);     
        }
    }

    class HockeyPlayer
    {
        private string name;
        private int jerseyNum;
        private int goals;

        public string LastName {get; set;}

        public int JerseyNum {get; set;}

        public int Goals {get; set;}

        public HockeyPlayer(string lastName, int jerseyNumber, int goalsScored)
        {
            name = lastName;
            jerseyNum = jerseyNumber;
            goals = goalsScored;
        }
    }
}

Answer 1

您在 HockeyPlayer 类的构造函数中设置了您的私有(private)字段，但您尝试通过您从未设置过的公共(public)属性检索它们。

将您的属性定义更改为:

public string LastName { get { 返回名称； } set { name = value;} }

等等..