枚举方面的问题望高手指教 - C# 论坛

wangbo1204

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注　册：2007-10-23

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枚举方面的问题望高手指教

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using   System;
using   System.Collections.Generic;
using   System.Text;
namespace   枚举方法
{

        public   class   ParseTest
        {
                [FlagsAttribute]
                enum   Colors   {   Red   =   1,   Green   =   2,   Blue   =   4,   Yellow   =   8   };
                public   static   void   Main()
                {
                        Console.WriteLine("The   entries   of   the   Colors   Enum   are:");
                        foreach   (string   colorName   in   Enum.GetNames(typeof(Colors)))
                        {
                                Console.WriteLine("{0}={1}",   colorName,
                                                                                          Convert.ToInt32(Enum.Parse(typeof(Colors),   colorName)));
                        }
                        Console.WriteLine();
                        Colors   myOrange   =   (Colors)Enum.Parse(typeof(Colors),   "Red,   Yellow");
                        Console.WriteLine("The   myOrange   value   {1}   has   the   combined   entries   of   {0}",myOrange,   Convert.ToInt64(myOrange));
                }
        }
}
这个程序中：
这句
Console.WriteLine("{0}={1}",   colorName,
                                                                                          Convert.ToInt32(Enum.Parse(typeof(Colors),   colorName)));
和这句：
Console.WriteLine("The   myOrange   value   {1}   has   the   combined   entries   of   {0}",myOrange,   Convert.ToInt64(myOrange));
的结果为什么会是前一个数字和符号一一对应而后一个却是将两个数值相加呢？







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colorName)));
                        }
                        Console.WriteLine();
                        Colors   myOrange   =   (Colors)Enum.Parse(typeof(Colors),   "Red,   Yellow");
                        Console.WriteLine("The   myOrange   value   {1}   has   the   combined   entries   of   {0}",myOrange,   Convert.ToInt64(myOrange));
                }
        }
}
这个程序中