ToString（）不返回预期的字符串

Question

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication3Generics
{
    class Program
    {
        static void Main(string[] args)
        {
            ScheduleSelectedItems sitems = new ScheduleSelectedItems("Yusuf");
            ScheduleSelectedItemsList slist = new ScheduleSelectedItemsList();
            slist.Items.Add(sitems);
            Console.Write(slist.Items[0].ToString());
            Console.ReadKey();
        }
    }
    public class ScheduleSelectedItems
    {
        private string Ad;

        public ScheduleSelectedItems(string ad)
        {
            Ad = ad;
        }
    }

    public class ScheduleSelectedItemsList
    {
        public List Items;

        public ScheduleSelectedItemsList()
        {
            Items = new List();
        }
    }
}

how can i add "yusuf" on my Console?

Answer 1

public class ScheduleSelectedItems
    {
        private string Ad;

        public ScheduleSelectedItems(string ad)
        {
            Ad = ad;
        }

        public override string ToString()
        {
            return this.Ad;
        }
    }

Answer 2

What BFree said, with a slight modification to make it singular instead of plural:

public class ScheduleSelectedItem
{
    private string Ad;

    public ScheduleSelectedItem(string ad)
    {
        Ad = ad;
    }
    public override string ToString()
    {
        return this.Ad;
    }
}

Additionally, you want an "Add" method for your list. While you're at it, why not just inherit from the list class:

public class ScheduleSelectedItemsList : List<ScheduleSelectedItem>
{

}

Or you could just create a type alias:

using ScheduleSelectedItemsList = List<ScheduleSelectedItem>;

Either way, you can use the new code like this:

class Program
{
    static void Main(string[] args)
    {
        var slist = new ScheduleSelectedItemsList() 
        { 
            new ScheduleSelectedItem("Yusuf") 
        };

        //write every item to the console, not just the first
        slist.All(item => Console.Write(item.ToString()) );
        Console.ReadKey();
    }
}

Answer 3

Add this to your ScheduleSelectedItems class:

    public override string ToString() {
        return Ad;
    }

That tells the system how such an object should be formatted.

Answer 4

您需要覆盖ScheduleSelectedItems的toString（）方法以返回“Ad”。