1. 最平常的方法
public enum Suits
{
Spades,
Hearts,
Clubs,
Diamonds,
NumSuits
}
public void PrintAllSuits()
{
foreach(string name in Enum.GetNames(typeof(Suits)))
{
System.Console.WriteLine(suit);
}
}
//z 2012-2-16 17:49:28 PM IS2120@CSDN
2. 扩展方法（更通用，更方便一些）
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;
}
}
//z 2012-2-16 17:51:39 PM is2120@csdn
//z The enum itself must be decorated with the FlagsAttribute
[Flags]
public enum EnumExample
{
ValueA = 1,
ValueB = 2,
ValueC = 4,
ValueD = 8,
Combi = ValueA | ValueB
}
3. 在compact framework中不支持 Enum.GetValues(//z 2012-2-16 17:47:28 PM IS2120@CSDN)
The .NET compact framework does not support Enum.GetValues. Here's a good workaround from Ideas 2.0: Enum.GetValues in Compact Framework:
//z 2012-2-16 17:49:28 PM IS2120@CSDN
public IEnumerable<Enum> GetValues(Enum enumeration)
{
List<Enum> enumerations = new List<Enum>();
foreach (FieldInfo fieldInfo in enumeration.GetType().GetFields(
BindingFlags.Static | BindingFlags.Public))
{
enumerations.Add((Enum)fieldInfo.GetValue(enumeration));
}
return enumerations;
}