Question

当我打印值时，我没有获得价值而是打印类型。在PlayerBO班Console.WriteLine(playerList);打印player[] 但我需要打印价值。

我的代码出了什么问题？

public class Program
{
    public static void Main(string[] args)
    {
        Player[] p= new Player[100];
        Console.WriteLine("Enter the number of players");
        int n = int.Parse(Console.ReadLine());
        int i;
        for (i = 0; i < n; i++)
        {
            p[i] = new Player();
            Console.WriteLine("Enter the player name");
            p[i].Name = Console.ReadLine();
            Console.WriteLine("Enter the country name");
            p[i].Country = Console.ReadLine();
            Console.WriteLine("Enter the skill");
            p[i].Skill = Console.ReadLine();
        }
        PlayerBO pb=new PlayerBO();
        pb.DisplayPlayerDetails(p);
    }
}

public class Player
{
    private string _country;
    private string _skill;
    private string _name;
    public Player(string _name, string _country, string _skill)
    {
        this._name = _name;
        this._country = _country;
        this._skill = _skill;
    }
    public Player() { }
    public string Name
    {
        get { return this._name; }
        set { this._name = value; }
    }

    public string Country
    {
        get { return this._country; }
        set { this._country = value; }
    }

    public string Skill
    {
        get { return this._skill; }
        set { this._skill = value; }
    }
    public override string ToString()
    {
        return string.Format("{0,-20}{1,-20}{2,0}", Name, Country, Skill);
    }
}

public class PlayerBO
{
    public void DisplayPlayerDetails(Player[] playerList)
    {
        playerList = new Player[100];
        Console.WriteLine("Player Details");
        Console.WriteLine(playerList);
    }
}

Answer 1

Console.WriteLine(playerList)将执行为数组实现的ToString - 这与覆盖该数组中对象类型的ToString不同。

要打印数组中的值，需要迭代它：

foreach(var item in playerList) 
{
    Console.WriteLine(item);
}

或者另一种方法是使用string.Join：

Console.WriteLine(string.Join(Environment.NewLine, playerList));

另外，请看一下自动属性：

//Instead of this:
public string Name
{
    get { return this._name; }
    set { this._name = value; }
}

//You can do this:
public string Name { get; set; }

覆盖ToString但在打印数组时会显示类型

1 个答案: