c# enum遍历

public enum Suit

{

    Spades,

    Hearts,

    Clubs,

    Diamonds

}

//遍历value
foreach (Suit suit in (Suit[]) Enum.GetValues(typeof(Suit)))

{

}

//遍历name
foreach(string name in Enum.GetNames(typeof(Suits)))

        {

                System.Console.WriteLine(name);

        }

public static class EnumExtensions

{

    /// <summary>

    /// Gets all items for an enum value.

    /// </summary>

    /// <typeparam name="T"></typeparam>

    /// <param name="value">The value.</param>

    /// <returns></returns>

    public static IEnumerable<T> GetAllItems<T>(this Enum value)

    {

        foreach (object item in Enum.GetValues(typeof(T)))

        {

            yield return (T)item;

        }

    }



    /// <summary>

    /// Gets all items for an enum type.

    /// </summary>

    /// <typeparam name="T"></typeparam>

    /// <param name="value">The value.</param>

    /// <returns></returns>

    public static IEnumerable<T> GetAllItems<T>() where T : struct

    {

        foreach (object item in Enum.GetValues(typeof(T)))

        {

            yield return (T)item;

        }

    }



    /// <summary>

    /// Gets all combined items from an enum value.

    /// </summary>

    /// <typeparam name="T"></typeparam>

    /// <param name="value">The value.</param>

    /// <returns></returns>

    /// <example>

    /// Displays ValueA and ValueB.

    /// <code>

    /// EnumExample dummy = EnumExample.Combi;

    /// foreach (var item in dummy.GetAllSelectedItems<EnumExample>())

    /// {

    ///    Console.WriteLine(item);

    /// }

    /// </code>

    /// </example>

    public static IEnumerable<T> GetAllSelectedItems<T>(this Enum value)

    {

        int valueAsInt = Convert.ToInt32(value, CultureInfo.InvariantCulture);



        foreach (object item in Enum.GetValues(typeof(T)))

        {

            int itemAsInt = Convert.ToInt32(item, CultureInfo.InvariantCulture);



            if (itemAsInt == (valueAsInt & itemAsInt))

            {

                yield return (T)item;

            }

        }

    }



    /// <summary>

    /// Determines whether the enum value contains a specific value.

    /// </summary>

    /// <param name="value">The value.</param>

    /// <param name="request">The request.</param>

    /// <returns>

    ///     <c>true</c> if value contains the specified value; otherwise, <c>false</c>.

    /// </returns>

    /// <example>

    /// <code>

    /// EnumExample dummy = EnumExample.Combi;

    /// if (dummy.Contains<EnumExample>(EnumExample.ValueA))

    /// {

    ///     Console.WriteLine("dummy contains EnumExample.ValueA");

    /// }

    /// </code>

    /// </example>

    public static bool Contains<T>(this Enum value, T request)

    {

        int valueAsInt = Convert.ToInt32(value, CultureInfo.InvariantCulture);

        int requestAsInt = Convert.ToInt32(request, CultureInfo.InvariantCulture);



        if (requestAsInt == (valueAsInt & requestAsInt))

        {

            return true;

        }



        return false;

    }

}

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