Question

I have an enumeration:

public enum SomeEnum
{
  A = 2,
  B = 4,
  C = 8
  D = 16 
}

SomeEnum e1 = SomeEnum.A | SomeEnum.B

Now I want to have a List of enum values, so e1 would be:

2, 4

So I have:

List<int> list = new List<int>();

foreach(SomeEnum se in Enum.GetValues(typeof(SomeEnum)))
{

  if(.....)
  {
     list.Add( (int)se );
  }


}

I need help with the if statement above.

Update

How can I build a list of ints representing the flags set in the enum e1?

Answer 1

Do you want to add the value if it’s in e1?

Then you can use the HasFlag method in .NET 4.

if(e1.HasFlag(se))
{
    list.Add( (int)se );
}

If you’re not using .net the equivilant is e1 & se == se

Also by convention you should mark your enum with the FlagsAttribute and it should be in plural form (SomeEnums)