Question

I have the following enum:

public enum UserRole {
  Admin = 1,
  Leader = 2,
  Editor = 3,
  Guest = 4
} // UserRole

And the following list:

IList<UserRole> roles = new List<UserRole> { UserRole.Leader, UserRole.Editor };

I would like to create two new lists:

1 – A list that picks the lowest index item in roles, eg, UserRole.Leader = 2 and all the UserRoles higher than that one. So I would get:

UserRole.Leader, UserRole.Editor, UserRole.Guest

2 – A list that picks the highest index item in roles, eg, UserRole.Editor = 3 and all the UserRoles lower than that one. So I would get:

UserRole.Admin, UserRole.Leader, UserRole.Editor

How can I do this?

Thank You,
Miguel

Answer 1

How about

public enum UserRole
{
    Admin = 1,
    Leader = 2,
    Editor = 3,
    Guest = 4
}

IList<UserRole> roles = new List<UserRole> { UserRole.Leader, UserRole.Editor };

var min = roles.Min();

var max = roles.Max();

var result1 = Enum.GetValues(typeof(UserRole)).Cast<UserRole>()
                  .Where(x => x >= min);

var result = Enum.GetValues(typeof(UserRole)).Cast<UserRole>()
                 .Where(x => x <= max);