帮帮我！c#实现按字符串出现的次数排序（升序）谢谢！！1

Question

c#实现按字符串出现的次数排序（升序）（可以任意输入的句子）控制台实现即可。比如：输入this is apple apple this this
结果： is 
      apple
      this
最好代码完整点，我刚刚学，是菜鸟级。。谢谢了！！

Answer 1

using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Collections.Generic;
using System.Collections;public class B 
{
    static void Main()
    {
        Console.Write("输入y开始，其他键退出...");
        while ( Console.ReadKey().KeyChar == 'y')
        {
            Console.WriteLine();
            Console.WriteLine("请输入语句：");
            string input = Console.ReadLine();
            string[] items = input.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
            Hashtable ht = new Hashtable();
            foreach (string s in items)
            {
                ht[s] = (ht[s] == null ? 1 : Convert.ToInt32(ht[s]) + 1);
            }
            object[] keys = new ArrayList(ht.Keys).ToArray();
            object[] values = new ArrayList(ht.Values).ToArray();
            Array.Sort(values, keys);
            for(int i=keys.Length-1;i>=0;i--)
            {
                Console.WriteLine(keys[i].ToString());
            }
            Console.Write("输入Y开始，其他键退出...");
        }
    }
}

Answer 2

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace WindowsApplication6
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        public class DinoComparer : IComparer<Return>
        {
            public  int Compare(Return x, Return y)
            {
                if (x == null)
                {
                    if (y == null)
                    {
                        // If x is null and y is null, they're
                        // equal. 
                        return 0;
                    }
                    else
                    {
                        // If x is null and y is not null, y
                        // is greater. 
                        return -1;
                    }
                }
                else
                {
                    // If x is not null...
                    //
                    if (y == null)
                    // ...and y is null, x is greater.
                    {
                        return 1;
                    }
                    else
                    {                        return x.Count.CompareTo(y.Count);                    }
                }
            }
        }        public  class Return
        {
            public string Value;
            public int Count;
        }        private void button1_Click(object sender, EventArgs e)
        {
            string bs1 = "this   is   apple   apple   this   this";
            string[] sa1 = bs1.Split(new char[] { ' '});
            Dictionary<string, Return> test = new Dictionary<string, Return>();
            foreach (string item in sa1)
            {
                if (!test.ContainsKey(item))
                {
                    Return Return = new Return();
                    Return.Value = item;
                    Return.Count = 0;                    test.Add(item, Return);
                }
                else
                {
                    test[item].Count++;
                }
            }
            List<Return> list = new List<Return>();
            list.AddRange(test.Values);
            DinoComparer dc = new DinoComparer();
            list.Sort(dc);            List<string> Out = new List<string>();            foreach (Return Return in list)
            {
                Out.Add(Return.Value);
            }        }
    }
}

Answer 3

不好意思,我在二楼贴的代码刚好相反,从多到少列出,改了一下,重贴using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Collections.Generic;
using System.Collections;public class B 
{
    static void Main()
    {
        Console.Write("输入y开始，其他键退出...");
        while ( Console.ReadKey().KeyChar == 'y')
        {
            Console.WriteLine();
            Console.WriteLine("请输入语句：");
            string input = Console.ReadLine();
            string[] items = input.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
            Hashtable ht = new Hashtable();
            foreach (string s in items)
            {
                ht[s] = (ht[s] == null ? 1 : Convert.ToInt32(ht[s]) + 1);
            }
            object[] keys = new ArrayList(ht.Keys).ToArray();
            object[] values = new ArrayList(ht.Values).ToArray();
            Array.Sort(values, keys);
            foreach (object o in keys) 
            {
                Console.WriteLine(o.ToString());
            }
            Console.Write("输入Y开始，其他键退出...");
        }
    }
}

Answer 4

黑马王子,using System.Collections.Generic;编译出错！！