枚举关于Flags特性的使用

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

namespace _02EnumTest
{
[Flags]//特性，表示可以将枚举对象视为位标志
enum CardDeckSetting : uint
{
SingleDeck    = 0x01, //位0：0000 0001
LargePrctures = 0x02, //位1：0000 0010
FancyNumbers  = 0x04, //位2：0000 0100
Animation     = 0x08  //位3：0000 1000
}
class EnumSource
{
bool UseSingleDeck = false,
UseBigPics = false,
UseFancyNumbers = false,
UseAnimation = false,
UseAnimationAndFancyNumbers = false;

//判断当前位是否包含在位集合中
public void SetOptions(CardDeckSetting ops)
{
UseSingleDeck = ops.HasFlag(CardDeckSetting.SingleDeck);
UseBigPics = ops.HasFlag(CardDeckSetting.LargePrctures);
UseFancyNumbers = ops.HasFlag(CardDeckSetting.FancyNumbers);
UseAnimationAndFancyNumbers = ops.HasFlag((CardDeckSetting.Animation | CardDeckSetting.FancyNumbers));
}

//使用FIags特性，可以把一个枚举标志字全部遍历出来
public void ShowCDSCollection()
{
CardDeckSetting ops = CardDeckSetting.Animation | CardDeckSetting.FancyNumbers | CardDeckSetting.LargePrctures;
Console.WriteLine(ops.ToString());
}

//字符串转为枚举值
public CardDeckSetting StringToEnum(string stringVal) => (CardDeckSetting)Enum.Parse(typeof(CardDeckSetting), stringVal);

//索引器
public bool this[int index]
{
set {
if (index<4)
{
switch (index)
{
case 0:
UseSingleDeck = value;
break;
case 1:
UseBigPics = value;
break;
case 2:
UseFancyNumbers = value;
break;
case 3:
UseAnimation = value;
break;
}
}
else
{
Console.WriteLine("超出索引范围（0-3）");
}

}
get {
if (index < 4)
{
switch (index)
{
case 0:
return UseSingleDeck;
case 1:
return UseBigPics;
case 2:
return UseFancyNumbers;
case 3:
return UseAnimation;
default:
return false;
}
}
else
{
Console.WriteLine("超出索引范围（0-3）");
return false;
}
}
}

//使用Enum的GetNames枚举进行迭代输出
public void  ShowEnumAll()
{
foreach (var item in Enum.GetNames(typeof(CardDeckSetting)))
{
Console.WriteLine(item);
}
}
}
}

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

namespace _02EnumTest
{
class Program
{
static void Main(string[] args)
{
CardDeckSetting ops = CardDeckSetting.Animation | CardDeckSetting.FancyNumbers | CardDeckSetting.SingleDeck;
EnumSource es = new EnumSource();

Console.WriteLine("==========位标志判断===========");
es.SetOptions(ops);
for (int i = 0; i < 4; i++)
{
Console.WriteLine(es[i]);//使用索引器
}
Console.WriteLine();
Console.WriteLine("=========字符串转换位枚举============");
Console.WriteLine(es.StringToEnum("SingleDeck"));
Console.WriteLine();
Console.WriteLine("=========使用Enum.GetNames()遍历所有的枚举对象============");
es.ShowEnumAll();
Console.ReadKey();
}
}
}