How to get an array of all enum values in C#?

I have an enum that I'd like to display all possible values of. Is there a way to get an array or list of all the possible values of the enum instead of manually creating such a list? e.g. If I have an enum:

publ开发者_StackOverflow中文版ic enum Enumnum { TypeA, TypeB, TypeC, TypeD }

how would I be able to get a List<Enumnum> that contains { TypeA, TypeB, TypeC, TypeD }?

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This gets you a plain array of the enum values using Enum.GetValues:

var valuesAsArray = Enum.GetValues(typeof(Enumnum));

And this gets you a generic list:

var valuesAsList = Enum.GetValues(typeof(Enumnum)).Cast<Enumnum>().ToList();

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Try this code:

Enum.GetNames(typeof(Enumnum));

This return a string[] with all the enum names of the chosen enum.

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Enum.GetValues(typeof(Enumnum));

returns an array of the values in the Enum.

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You may want to do like this:

public enum Enumnum { 
            TypeA = 11,
            TypeB = 22,
            TypeC = 33,
            TypeD = 44
        }

All int values of this enum is 11,22,33,44.

You can get these values by this:

var enumsValues = Enum.GetValues(typeof(Enumnum)).Cast<Enumnum>().ToList().Select(e => (int)e);

string.Join(",", enumsValues) is 11,22,33,44.

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You can use

Enum.GetValues(typeof(SomeEnum)).Cast<SomeEnum>().ToArray();

This returns an array!

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This is way easier now with the generic method in .NET 5.0.

ColorEnum[] colors = Enum.GetValues<ColorEnum>();

MS Doc: Enum.GetValues

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Something little different:

typeof(SomeEnum).GetEnumValues();

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with this:

string[] myArray = Enum.GetNames(typeof(Enumnum));

and you can access values array like so:

Array myArray = Enum.GetValues(typeof(Enumnum));

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If you prefer a more generic way, here it is. You can add up more converters as per your need.

    public static class EnumConverter
    {

        public static string[] ToNameArray<T>()
        {
            return Enum.GetNames(typeof(T)).ToArray();
        }

        public static Array ToValueArray<T>()
        {
            return Enum.GetValues(typeof(T));
        }

        public static List<T> ToListOfValues<T>()
        {
            return Enum.GetValues(typeof(T)).Cast<T>().ToList();
        }


        public static IEnumerable<T> ToEnumerable<T>()
        {
            return (T[])Enum.GetValues(typeof(T));
        }

    }

Sample Implementations :

   string[] roles = EnumConverter.ToStringArray<ePermittedRoles>();
   List<ePermittedRoles> roles2 = EnumConverter.ToListOfValues<ePermittedRoles>();
   Array data = EnumConverter.ToValueArray<ePermittedRoles>();

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The OP asked for How to get an array of all enum values in C# ?

What if you want to get an array of selected enum values in C# ?

Your Enum

    enum WeekDays 
    {
        Sunday, 
        Monday,
        Tuesday
    }

If you want to just select Sunday from your Enum.

  WeekDays[] weekDaysArray1 = new WeekDays[] { WeekDays.Sunday };

  WeekDays[] weekDaysArray2 = Enum.GetValues(typeof(WeekDays)).Cast<WeekDays>().Where
  (x => x == WeekDays.Sunday).ToArray();

Credits goes to knowledgeable tl.

References:

1.

2.

Hope helps someone.

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also you can use

var enumAsJson=typeof(SomeEnum).Name + ":[" + string.Join(",", Enum.GetValues(typeof(SomeEnum)).Cast<SomeEnum>().Select(e => e.ToString())) + "]";

for get all elements in enum as json format.