enum sex : byte　　//顯示指定枚舉的底層數(shù)據(jù)類型
 { 
  male,
  female,　　//此逗號可以省略
 };　　　　　　 //此分號可以省略

enum Week
 { 
  Monday = 1,
  Tuesday = 2,
  Wednesday = 3,
  Sunday = 0,
　　　　 Everyday = 1　　//成員的值可以設(shè)置成一樣的，但是成員不行
 }
　　Console.WriteLine((int)Week.Monday);　　//獲取值

class Program
 {
  static void Main(string[] args)
  {
   Console.WriteLine(Enum.GetName(typeof(Man),1)); //還是 劉備 (由值獲取名字)

   string[] array1 = Enum.GetNames(typeof(Man));
   Console.WriteLine(array1[1]); //關(guān)羽

   Array array2 = Enum.GetValues(typeof(Man));
   Console.WriteLine(array2.GetValue(1)); //還是關(guān)羽

   Type t = Enum.GetUnderlyingType(typeof(Man));
   Console.WriteLine(t);  //輸出 Int32

   //由值獲取內(nèi)容
   int i = 1;
   string Name = Enum.Parse(typeof(Man), i.ToString()).ToString();  //此時 Name="劉備"
   Console.WriteLine(Name);

   //由值獲取內(nèi)容
   string Name2 = "關(guān)羽";
   int j = Convert.ToInt32(Enum.Parse(typeof(Man), Name2));  //此時 j=2
   Console.WriteLine(j);

   Console.ReadKey();
  }
 }

 enum Man
 { 
  劉備 = 1,
  關(guān)羽 = 2,
  張飛 = 3
 }

class Program
 {
  static void Main(string[] args)
  {
   var man = Week.白 | Week.美; //賦值為101 計(jì)算方法001或上100,結(jié)果是101
   Console.WriteLine((int)man);
   if ((man & Week.白) == Week.白)  //101 man 
   {         //001 白 逐位相與，
    Console.WriteLine("此人白");  //001 如果結(jié)果是白，就可以反推出man包含 白
   }
   else
   {
    Console.WriteLine("此人黑");
   }
   Console.ReadKey();
  }
 }

 [System.Flags]
 public enum Week
 { 
  白 = 1, //001
  富 = 2, //010
  美 = 4, //100
 }

select * from Table1 where Tag & 1 = 1　　//Tag是列名

select * from Table1 where Tag | 1 = Tag

namespace MvcStart.Controllers
{
 public class HomeController : Controller
 {
  public ActionResult GetSexList()
  {
   Dictionary<string, int> Sexlist = new Dictionary<string, int>();
   string[] keys = Enum.GetNames(typeof(sex));
   Array values = Enum.GetValues(typeof(sex));

   for (int i = 0; i < keys.Length; i++)
   {
    Sexlist.Add(keys[i], (int)values.GetValue(i));
   }

   return View(Sexlist);
  }
 }

 public enum sex
 { 
  male = 1,
  female = 2,
  other = 3
 }
}

@model Dictionary<string, int>
<select>
 @foreach(var item in @Model)
 {
  <option value="@item.Value">@item.Key</option>
 }
</select>

<select>
  <option value="1">male</option>
  <option value="2">female</option>
  <option value="3">other</option>
</select>

public static class GetDescription
 {
  /// <summary>
  /// 獲取描述信息
  /// </summary>
  /// <param name="en"></param>
  /// <returns></returns>
  public static string description(this Enum en)
  {
   Type type = en.GetType();
   MemberInfo[] memInfo = type.GetMember(en.ToString());
   if (memInfo != null && memInfo.Length > 0)
   {
    object[] attrs = memInfo[0].GetCustomAttributes(typeof(System.ComponentModel.DescriptionAttribute), false);
    if (attrs != null && attrs.Length > 0)
     return ((DescriptionAttribute)attrs[0]).Description;
   }
   return en.ToString();
  }
 }

 public enum Sex
 {
  [Description("男")]
  man = 1,
  [Description("女")]
  woman = 2,
  [Description("其他")]
  other = 3
 }