继承：如何使用子类中的变量？

Question

如何使用Program.cs中子类的变量？我只能使用Player类中声明的那些。但是我能够“合并”子类参数与父类的变量

但是当我尝试使用这些变量时，它们会丢失：

如何从子类中调用变量？如果可能的话。

abstract class Player
{
    public string Team { get; set; }
    public string Name { get; set; }
    public string surName { get; set; }
    public DateTime birthDate { get; set; }
    public int gamesCount { get; set; }
    public Player()
    { }
    public Player(string Team, string Name, string surName, DateTime birthDate, int gamesCount)
    {
        this.Team = Team;
        this.Name = Name;
        this.surName = surName;
        this.birthDate = birthDate;
        this.gamesCount = gamesCount;
    }

}


class BasketballPlayers : Player
{
    public int Rebounds { get; set; }
    public int Assists { get; set; }
    public int scorePoints { get; set; }
    public BasketballPlayers()
    { }
    public BasketballPlayers(string Team, int gamesCount, string Name, string surName, DateTime birthDate, int scorePoints, int Rebounds, int Assists)
        : base(Team, Name, surName, birthDate, gamesCount)
    {
        this.scorePoints = scorePoints;
        this.Rebounds = Rebounds;
        this.Assists = Assists;
    }
class FootballPlayers : Player
{
    public int yellowCards { get; set; }
    public int scorePoints { get; set; }
    public FootballPlayers()
    { }
    public FootballPlayers(string Team, int gamesCount, string Name, string surName, DateTime birthDate, int scorePoints, int yellowCards)
        : base(Team, Name, surName, birthDate, gamesCount)
    {
        this.yellowCards = yellowCards;
        this.scorePoints = scorePoints;
    }

更新：PlayersContainer bPlayers = new PlayersContainer(100)用于篮球运动员           PlayersContainer fPlayers = new PlayersContainer(100);这是给足球运动员的。

    static void ReadDataFromFiles(string basketBallFile, string footBallFile, string teamInfoFile, PlayersContainer bPlayers, PlayersContainer fPlayers)
    {
        ReadPlayerData(basketBallFile, bPlayers);
        ReadPlayerData(footBallFile, fPlayers);
    }
    static void ReadPlayerData(string filePath, PlayersContainer Players)
    {
        using (StreamReader reader = new StreamReader(filePath))
        {
            string line = null;
            string playerType = null;
            line = reader.ReadLine();
            if (line != null)
            {
                playerType = line;
            }
            int i = 0;
            while (null != (line = reader.ReadLine()))
            {
                string[] values = line.Split(';');
                string Team = values[0];
                string surName = values[1];
                string Name = values[2];
                DateTime birthDate = DateTime.Parse(values[3]);
                int gamesCount = int.Parse(values[4]);
                int scorePoints = int.Parse(values[5]);

                switch (filePath)
                {
                    case "../../Krepsininkai.csv":
                        int Rebounds = int.Parse(values[6]);
                        int Assists = int.Parse(values[7]);
                        BasketballPlayers bPlayer = new BasketballPlayers(Team, gamesCount, Name, surName, birthDate, scorePoints, Rebounds, Assists);
                        Players.AddPlayer(bPlayer);
                        break;
                    case "../../Futbolininkai.csv":
                        int yellowCards = int.Parse(values[6]);
                        FootballPlayers fPlayer = new FootballPlayers(Team, gamesCount, Name, surName, birthDate, scorePoints, yellowCards);
                        Players.AddPlayer(fPlayer);
                        break;

                }
            }
        }

    }

当我调试时，我可以看到添加了那些排他性参数，我的意思是Rebounds, Assists, scorePoints对于足球运动员，yellowCards, scorePoints对于足球运动员。但是然后我尝试访问它们，为此我需要一种方法还是什么？我只能调用基类参数。

Answer 1

最好通过创建一个具有要调用的属性的Abstract Base Class来设计此需求。只是让派生类或子类覆盖属性即可。然后，当一个具有引用或通过与基础相关的接口的引用时，如果它的实例确实是子代，则调用/使用子代的属性。