Get int values of Enum[]

Question

I have a method such as:

public void DoIt(params MyEnum[] channels)
{

}

Is there a way to get the int values of the enums in the params?

I tried var myInts = channels.Select(x => x.Value) but no luck

@shahkalpesh I'm guessing "to express zero, one, or many values, expressed in terms of the enum, but using their underlying integer values internally" — Marc Gravell, May 01 '13 at 15:58
@MarcGravell: Thanks. I guessed OP is looking for combining enum values using `FlagsAttribute`. Also, if an array is passed, enum values can be passed more than once. — shahkalpesh, May 01 '13 at 15:59
In that case surely you would use a BitWise enum? Edit - what shahkalpesh said — pingoo, May 01 '13 at 16:01
@Rebel that doesn't necessarily mean it is suitable for [Flags] usage — Marc Gravell, May 01 '13 at 16:02
possible duplicate of [get-int-value-from-enum?](http://stackoverflow.com/questions/943398/get-int-value-from-enum?) — nawfal, Jun 14 '14 at 19:56

score 7 · Accepted Answer · answered May 01 '13 at 15:56

7

var myInts = channels.Cast<int>();

answered May 01 '13 at 15:56

Justin Niessner

score 7 · Answer 2 · answered May 02 '13 at 21:11

7

var ints = (int[]) (object) channels;

answered May 02 '13 at 21:11

Zakharia Stanley

score 5 · Answer 3 · answered May 01 '13 at 15:55

5

You can do a cast in the select clause:

var myInts = channels.Select(x => (int)x);

answered May 01 '13 at 15:55

Matten

score 5 · Answer 4 · answered May 01 '13 at 15:56

5

Another way to do the same, without LINQ:

var vals = Array.ConvertAll(channels, c =>(int)c);

answered May 01 '13 at 15:56

Marc Gravell

score 2 · Answer 5 · answered May 01 '13 at 15:56

2

var myInts = channels.Select(x=x.Value) this doesn't work because = needs to be => (int)x

I think var myInts = channels.Select(x => (int)x).ToArray(); will do what you want.

answered May 01 '13 at 15:56

evanmcdonnal

score 1 · Answer 6 · answered May 01 '13 at 15:55

1

This should do it:

public void DoIt(params MyEnum[] channels)
{
   int[] ret = channels.Select(x => ((int)x)).ToArray();
}

answered May 01 '13 at 15:55

gideon

score 1 · Answer 7 · answered May 01 '13 at 15:55

1

You could do:

var myInts = channels.Select(e => (int)e);

Or as a LINQ query:

var myInts = from e in channels select (int)e;

You could then call ToArray() or ToList() on myInts to get a MyEnum[] or a List<MyEnum>

answered May 01 '13 at 15:55

Mike Christensen

7 Answers7