使用枚举类型默认的ToString()方法，往往不能得到我们想要的输出的字符串。

如何方便的定义枚举类型中的每个值代表的字符串输出呢？

可以使用DescriptionAttribute, 写上想得到的字符串输出。

enum Direction{    [Description("Rover is facing to UP (Negtive Y)")]    UP = 1,    [Description("Rover is facing to DOWN (Positive Y)")]    DOWN = 2,    [Description("Rover is facing to RIGHT (Positive X)")]    RIGHT = 3,    [Description("Rover is facing to LEFT (Negtive X)")]    LEFT = 4};

使用下面的方法，来得到对应项的字符串。

/// 
    /// Contains methods for working with 
      .    /// 
    public static class EnumHelper    {        /// 
        /// Gets the specified enum value's description.        /// 
        /// The enum value.        /// 
     
      The description or 
      
       null
              /// if enum value doesn't have 
      .
             public static string GetDescription(this Enum value)        {            var fieldInfo = value.GetType().GetField(value.ToString());            var attributes = (DescriptionAttribute[])fieldInfo.GetCustomAttributes(                                                         typeof(DescriptionAttribute),                                                         false);            return attributes.Length > 0                       ? attributes[0].Description                       : null;        }        /// 
        /// Gets the enum value by description.        /// 
        /// 
     
      The enum type.
             /// The description.        /// 
     
      The enum value.
             public static EnumType GetValueByDescription
     
      (string description)        {            var type = typeof(EnumType);            if (!type.IsEnum)                throw new ArgumentException("This method is destinated for enum types only.");            foreach (var enumName in Enum.GetNames(type))            {                var enumValue = Enum.Parse(type, enumName);                if (description == ((Enum)enumValue).GetDescription())                    return (EnumType)enumValue;            }            throw new ArgumentException("There is no value with this description among specified enum type values.");        }    }
     

 进一步了解