摘要：
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？enumDirection{[Description]UP=1,[Description]DOWN=2,[Description]RIGHT=3,[Description]LEFT=4};使用下面的方法，来得到对应项的字符串。
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。
enumDirection { [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。
/// <summary> ///Contains methods for working with <see cref="Enum"/>. /// </summary> public static classEnumHelper { /// <summary> ///Gets the specified enum value's description. /// </summary> /// <param name="value">The enum value.</param> /// <returns>The description or <c>null</c> ///if enum value doesn't have <see cref="DescriptionAttribute"/>.</returns> public static string GetDescription(thisEnum value) { var fieldInfo =value.GetType().GetField(value.ToString()); var attributes =(DescriptionAttribute[])fieldInfo.GetCustomAttributes( typeof(DescriptionAttribute), false); return attributes.Length > 0 ? attributes[0].Description : null; } /// <summary> ///Gets the enum value by description. /// </summary> /// <typeparam name="EnumType">The enum type.</typeparam> /// <param name="description">The description.</param> /// <returns>The enum value.</returns> public static EnumType GetValueByDescription<EnumType>(stringdescription) { var type = typeof(EnumType); if (!type.IsEnum) throw new ArgumentException("This method is destinated for enum types only."); foreach (var enumName inEnum.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.net中的Attribue