按描述比较标志枚举

Question

I have the following enum:

[Flags]
public enum UserRoles {

  [Description("Gestor")]
  Admin = 1 << 0,

  [Description("Editor")]
  Editor = 1 << 1,

  [Description("Membro")]
  Member = 1 << 2
}

And then I have:

String[] currentUserRoles = new String[] { "Gestor, "Membro" }

UserRoles testRoles = UserRoles.Admin | UserRoles.Editor;

I would like to test if any of the testRoles are included in currentUserRoles.

The problem is that currentUserRoles are the Description attribute.

I was able to solve this using

UserRoles role;
currentUserRoles.Select(x => x.Value).Any(y => (Enum.TryParse(y, true, out role) && testRoles.HasFlag(role)));

But I would like to use the Description attribute to compare.

How can I do this?

Thank You

Answer 1

var result =
   Enum.GetValues(typeof(UserRoles))
       .Cast<UserRoles>()
       .Where(r => (r & testRoles) == r)
       .Select(r => typeof(UserRoles).GetField(r.ToString())
                                     .GetCustomAttribute<DescriptionAttribute>()
                                     .Description)
       .Intersect(currentUserRoles)
       .Any();