ENUM協助類

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.Reflection;

namespace CommonFunction
{
public class EnumClass
    {
private static object refLock = new object();
private static EnumClass instance=null;

public static EnumClass Instance
       {
get {
lock (refLock)
               {
if (instance == null)
                   {
lock (refLock)
                       {
                           instance = new EnumClass();
                       }
                   }
               }
return instance;
           }
       }


/// <summary>
/// 擷取指定枚舉類型的索引值對集合
/// </summary>
/// <param name="type">枚舉類型</param>
/// <returns></returns>
       public Hashtable GetKeysAndValues(Type type)
       {
if (!CheckType(type))
           {
return null;
           }

           Hashtable list = new Hashtable();
foreach (string key in Enum.GetNames(type))
           {
string val=Enum.Format( type, Enum.Parse(type, key), "d");
               list.Add(key,val);
           }

return list;
       }


/// <summary>
/// 擷取枚舉類型元素集合
/// </summary>
/// <param name="type">枚舉類型</param>
/// <returns></returns>
       public Array GetKeys(Type type)
       {
if (!CheckType(type))
           {
return null;
           }

//檢索指定枚舉中常數值的數組
           return Enum.GetValues(type);
       }


/// <summary>
/// 檢驗枚舉類型
/// </summary>
/// <param name="type">類型</param>
/// <returns></returns>
       private bool CheckType(Type type)
       {
if (type == null)
           {
return false;
           }

if (!type.IsEnum)
           {
throw new Exception(type.FullName + "不是枚舉類型");
           }

return true;
       }


/// <summary>
/// 擷取枚舉類型值集合
/// </summary>
/// <param name="type">枚舉類型</param>
/// <returns></returns>
       public List<int> GetValues(Type type)
       {
           Array array = GetKeys(type);
           List<int> list = new List<int>();
foreach (object obj in array)
           {
               list.Add((int)obj);
           }

return list;
       }

    }
}

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

namespace CommonFunction
{
class Program
    {
enum Days { Sunday = 0, Monday = 1, Tuesday = 2, Wednesday = 3, Thursday = 4, Friday = 5, Saturday = 6 };
static void Main(string[] args)
        {
            Hashtable hashtable= EnumClass.Instance.GetKeysAndValues(typeof(Days));
            Console.WriteLine("---------枚舉類型索引值對---------");
foreach (DictionaryEntry de in hashtable)
            {
                Console.WriteLine(de.Key+" = "+de.Value);
            }
            Console.WriteLine();

            Console.WriteLine("---------枚舉類元素---------");
            Array array = EnumClass.Instance.GetKeys(typeof(Days));
foreach (Days day in array)
            {
                Console.WriteLine(day);
            }
            Console.WriteLine();

            Console.WriteLine("---------枚舉類值---------");
            List<int> list = EnumClass.Instance.GetValues(typeof(Days));
foreach (int i in list)
            {
                Console.WriteLine(i);
            }
            Console.ReadLine();
        }
    }
}