How to convert enum to list

Question

Here is enum;

   public enum myEnum{   
    A= 1,
    B= 2,
    C= 3,
    D= 4,
}

I need a List contains all except D, this way its works;

List<Enum>{myEnum.A, myEnum.B, myEnum.C}

but of course its extremely ugly. How can directly convert and filter D of this enum

https://stackoverflow.com/questions/1167361/how-do-i-convert-an-enum-to-a-list-in-c Hope, this helps. — Dmitriy, May 21 '19 at 13:00
@Henk Holterman why did you re-open this duplicate? Please close it as it was voted by a handful as a duplicate. — Trevor, May 21 '19 at 13:18

score 7 · Accepted Answer · answered May 21 '19 at 13:04

7

Enum.GetValues(typeof(MyEnum)).Cast<MyEnum>().Where(x => x != MyEnum.D).ToList();

answered May 21 '19 at 13:04

Sam

1,634
13
21

1

@TyForHelpDude it's not, it's projecting the objects into a new list... – Trevor May 21 '19 at 13:10
Yeah I see my expect was List with variables of individual enums list, not List. Anyway I can live with it also Thanks – TyForHelpDude May 21 '19 at 13:14

Moritz Schmidt · Answer 2 · 2019-05-21T13:03:02.220

2

You can convert an enum to a list like this:

var enumList = Enum.GetValues(typeof(myEnum)).Cast<myEnum>().ToList();

And to remove myEnum.D, simply call the Remove method:

var enumList = Enum.GetValues(typeof(myEnum)).Cast<myEnum>().ToList().Remove(myEnum.D);

As mentioned in the comments, you could also add only the Enums values, which are not myEnum.D:

var enumList = Enum.GetValues(typeof(myEnum)).Cast<myEnum>().ToList().Where(val => val != myEnum.D);

edited May 21 '19 at 13:03

answered May 21 '19 at 13:00

Moritz Schmidt

2,635
3
27
51

1

It's better to use a `where` instead of adding the ones you want to a list and then removing ... – Trevor May 21 '19 at 13:01

score 1 · Answer 3 · answered May 21 '19 at 13:06

You can get all the values of an enum by calling Enum.GetValues(type) (https://learn.microsoft.com/en-us/dotnet/api/system.enum.getvalues?view=netframework-4.8)

After getting all the values you can exclude certain values you don't want:

public class Program
{
    public static void Main()
    {
        var allValues = Enum.GetValues(typeof (MyEnum))
            .Cast<MyEnum>()
            .Except(new[]{MyEnum.D})
            .ToArray();

        foreach (var val in allValues)
        {
            Console.WriteLine(val);
        }
    }
}

public enum MyEnum
{
    A,
    B,
    C,
    D
}

This will output:

A B C

https://dotnetfiddle.net/hdZmAK

How to convert enum to list

3 Answers3