C# 如何在Arraylis裡找出相同的值並計算出現次數

有一個 Arraylist 裡面有值為 {1,2,3,4,5,3,10,1,2,4,12,9,4} 等數字
要一個數字只顯示一次,不重複
並計算出每個數字共出現幾次?

顯示gridview 如下

Num   Count
------------
1       2
2       2
3       2
4       3
5       1
9       1
10      1
12      1

public static void Main(string[] args)
{
    int[] iArr = new int[] { 1, 2, 3, 4, 5, 3, 10, 1, 2, 4, 12, 9, 4 };

    SortedDictionary<int, int> sDict = new SortedDictionary<int, int>();

    foreach (int i in iArr)
    {
        if (sDict.ContainsKey(i))
        {
            int value = sDict[i];
            sDict.Remove(i);
            sDict.Add(i, value + 1);
        }
        else
            sDict.Add(i, 1);               
    }

    Console.WriteLine("  Num    Count");
    Console.WriteLine(" --------------  ");
    foreach (KeyValuePair<int, int> kvp in sDict)
        Console.WriteLine("{0,4}{0,8}", kvp.Key, kvp.Value);

    Console.ReadKey();
}

Result:

C# : Simple Console Calendar

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace ConsoleCalendar
{
    public class Program
    {
        public static void Main(string[] args)
        {
            int year, month, day;
            Console.Write("請輸入年份：");
            year = Convert.ToInt32(Console.ReadLine());
            Console.Write("請輸入月份：");
            month = Convert.ToInt32(Console.ReadLine());
            Console.Write("請輸入日期：");
            day = Convert.ToInt32(Console.ReadLine());

            Console.Clear();
            DateTime d = new DateTime(year, month, day);
            Console.WriteLine("{0}/{1}/{2} {3} {4}", d.Year, d.Month, d.Day, d.DayOfWeek, DateTime.DaysInMonth(d.Year, d.Month));
            PrintLine();
            PrintRows(3, new string[] { "日", "一", "二", "三", "四", "五", "六" }, 7);
            PrintLine();
            PrintRows(4, GetDaysArray(d), 7);
            PrintLine();
            Console.ReadKey();
        }

        private static string[] GetDaysArray(DateTime dt)
        {
            List<string> list = new List<string>();

            //Fill the spaces of first line
            DateTime firstDay = new DateTime(dt.Year, dt.Month, 1);
            switch (firstDay.DayOfWeek)
            {
                case DayOfWeek.Monday:
                    list.Add("");
                    break;
                case DayOfWeek.Tuesday:
                    list.AddRange(new string[] { "", "" });
                    break;
                case DayOfWeek.Wednesday:
                    list.AddRange(new string[] { "", "", "" });
                    break;
                case DayOfWeek.Thursday:
                    list.AddRange(new string[] { "", "", "", "" });
                    break;
                case DayOfWeek.Friday:
                    list.AddRange(new string[] { "", "", "", "", "" });
                    break;
                case DayOfWeek.Saturday:
                    list.AddRange(new string[] { "", "", "", "", "", "" });
                    break;
            }
            //the date, 1 ~ 28 or 29 or 30 or 31
            //mark the date for special color
            for (int i = 1; i <= DateTime.DaysInMonth(dt.Year, dt.Month); i++)
            {
                if (i == dt.Day)
                    list.Add("{" + i + "}");
                else
                    list.Add(i + "");
            }
            return list.ToArray();
        }

        private static void PrintLine()
        {
            Console.WriteLine(new string('-', 36));
        }

        private static void PrintRows(int width, string[] columns, int itemsPerLine)
        {
            StringBuilder sb = new StringBuilder();
            int totalLines = columns.Length % itemsPerLine == 0 ? columns.Length / itemsPerLine : columns.Length / itemsPerLine + 1;
            for (int i = 0; i < totalLines; i++)
            {
                for (int j = 0; j < itemsPerLine; j++)
                {
                    int pos = i * itemsPerLine + j;
                    if (pos >= columns.Length)
                        break;
                    sb.Append("|" + AlignCentre(columns[pos], width));
                }
                sb.Append("|");
                sb.Append("\n");
            }

            //Start to print
            uint STD_OUTPUT_HANDLE = 0xfffffff5;
            IntPtr hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
            foreach (char c in sb.ToString().ToCharArray())
            {
                if (c == '{')
                {
                    //SetConsoleTextAttribute(hConsole, 12);
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.Write(' ');
                    continue;
                }
                if (c == '}')
                {
                    //SetConsoleTextAttribute(hConsole, 7);
                    Console.ForegroundColor = ConsoleColor.Gray;
                    Console.Write(' ');
                    continue;
                }
                Console.Write(c);
            }
        }

        private static string AlignCentre(string text, int width)
        {
            if (string.IsNullOrEmpty(text))
                return new string(' ', width);
            else
                return text.PadLeft(width - (width - text.Length) / 2).PadRight(width);
        }

        [DllImport("kernel32.dll")]
        private static extern bool SetConsoleTextAttribute(IntPtr hConsoleOutput, int wAttributes);

        [DllImport("kernel32.dll")]
        private static extern IntPtr GetStdHandle(uint nStdHandle);

    }
}

Result:




Source Code: Download