How to Enum.GetValues in .Net 3.5?
Pergunta
In .Net 4.0, I use System.Enum.GetValues(typeof(Gender))
to get the list of enum item.
In a complete example, I use to look for enum value in this way:
Gender retVal = Gender.Male;
foreach (Gender enumType in System.Enum.GetValues(typeof(Gender)))
{
if (enumType.ToString().Trim().ToUpper().Substring(0,1).Equals(stringToEnum.Trim().ToUpper()))
{
retVal = enumType;
break;
}
}
But how could I do this in .Net 3.5 (Pocket PC) ?
Thanks in advance !
I use the answers below but It doesn't work for me. Here's the code:
Enum Values:
namespace Ionic.Zlib
{
public enum CompressionLevel
{
Level0 = 0,
None = 0,
Level1 = 1,
BestSpeed = 1,
Level2 = 2,
Level3 = 3,
Level4 = 4,
Level5 = 5,
Level6 = 6,
Default = 6,
Level7 = 7,
Level8 = 8,
BestCompression = 9,
Level9 = 9,
}
}
Usage:
I just miss to initialize new object. This works now:
public static Ionic.Zlib.CompressionLevel GetCompressionLevel(string Expression)
{
Ionic.Zlib.CompressionLevel result = Ionic.Zlib.CompressionLevel.None;
foreach (Ionic.Zlib.CompressionLevel item in EnumGetValues(new Ionic.Zlib.CompressionLevel()))
{
if(object.Equals(item.ToString().Trim().ToUpper(), Expression.Trim().ToUpper()))
{
result = item;
break;
}
}
return result;
}
Solução
There's a blog post here (archived here) which achieves it via reflection:
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;
}
Outras dicas
System.Enum.GetValues
is not supported on .NET CF 3.5, you should find another way to iterate on your enum, for example have a look here:
In addition to shamp00's answer I would suggest to create a static method with a generic type parameter. That way you don't need to pass a variable of the enum type to the method:
public static class EnumHelper
{
public static TEnum[] GetValues<TEnum>()
{
return typeof(TEnum)
.GetFields(BindingFlags.Static | BindingFlags.Public)
.Select(fieldInfo => (TEnum)fieldInfo.GetValue(null))
.ToArray();
}
}
Usually I don't like class ending on "Helper", but using just Enum
would conflict with the built-in Enum
-class.
To use this method just invoke it with your enum type:
var values = EnumHelper.GetValues<MyEnum>();