枚举元素的可读字符串

我使用相当多的enum块，但我讨厌使用匹配的switch 语句来将它们渲染成可读字符串（或者使用字符串数组来做同样的事情，尤其是在我的enum 可能只有六个元素，并且值固定在1和十六进制8000之间时）。所以我设计了这个方法来消除这个问题，并将描述性文本与enum 元素定义一起保留。这通过使用反射来访问可以应用于任何控件的DescriptionAttribute，并且也可以应用于任何其他对象 - 包括单个变量，如果你愿意的话。 (这可能有点过头，但嘿！这是你的软件！)。声明这两个静态方法

        /// <summary>
        /// Get description of a enum value
        /// See DescriptionAttribute for enum element
        /// </summary>
        /// <remarks>
        /// Returns the human readable string set as the DescriptionAttribute
        /// for an enum element.
        /// If the DescriptionAttribute has not been set, returns the enum element name
        /// </remarks>
        /// <example>
        /// public enum MyEnum
        ///    {
        ///    [DescriptionAttribute("A Human readable string")]
        ///    AMachineReadableEnum,
        ///    }
        /// ...
        ///    string s = MyEnum.AMachineReadableEnum.ToString();
        ///    s += " : " + GetDescription(MyEnum.AMachineReadableEnum);
        ///    MessageBox.Show(s);
        ///    
        /// would display "AMachineReadableEnum : A Human readable string"
        /// </example>
        /// <seealso cref="ValueOf<T>"/>
        /// <param name="value">Enum element with human readable string</param>
        /// <returns>Human readable string for enum element</returns>
        public static string GetDescription(Enum value)
            {
            // Get information on the enum element
            FieldInfo fi = value.GetType().GetField(value.ToString());
            // Get description for elum element
            DescriptionAttribute[] attributes = (DescriptionAttribute[]) fi.GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (attributes.Length > 0)
                {
                // DescriptionAttribute exists - return that
                return attributes[0].Description;
                }
            // No Description set - return enum element name
            return value.ToString();
            }
        /// <summary>
        /// Get an enum element from its human readable string.
        /// </summary>
        /// <remarks>
        /// Returns the enum element for a human readable string
        /// If the DescriptionAttribute has not been set, throws an
        /// ArgumentException
        /// </remarks>
        /// <example>
        /// public enum MyEnum
        ///    {
        ///    [DescriptionAttribute("A Human readable string")]
        ///    AMachineReadableEnum,
        ///    }
        /// ...
        ///    MyEnum me = ValueOf<MyEnum>("A Human readable string");
        ///    MyEnum me = MyEnum.AMachineReadableEnum;
        ///    
        /// would be equivelent
        /// </example>
        /// <exception cref="ArgumentException if description not found to match an enum element"
        /// <seealso cref="GetDescription"/>
        /// <typeparam name="T">Enum the element will belong to</typeparam>
        /// <param name="description">Human readable string assocuiated with enum element</param>
        /// <returns>Enum element</returns>
        public static T ValueOf<T>(string description)
            {
            Type enumType = typeof(T);
            string[] names = Enum.GetNames(enumType);
            foreach (string name in names)
                {
                if (GetDescription((Enum) Enum.Parse(enumType, name)).Equals(description, StringComparison.InvariantCultureIgnoreCase))
                    {
                    // Found it!
                    return (T) Enum.Parse(enumType, name);
                    }
                }
            // No such description in this enum
            throw new ArgumentException("The string is not a description or value of the specified enum.");
            }

现在声明你的枚举，并使用DescriptionAttribute

        public enum MyEnum
            {
            [DescriptionAttribute("A Human readable string")]
            AMachineReadableEnum,
            [DescriptionAttribute("Another Human readable string")]
            ASecondMachineReadableEnum,
            }

然后尝试一下

        private void ShowItWorking()
            {
            string s = "";
            s = GetDescription(MyEnum.AMachineReadableEnum);
            s += " : " + MyEnum.AMachineReadableEnum.ToString();
            s += " : " + ValueOf<MyEnum>("a human READABLE string");
            MyEnum me = ValueOf<MyEnum>("A HUMAN readable STRING");
            s += " : " + ((int) ).ToString();
            MessageBox.Show(s);
            }