Use enum item name like an attribute parameter

Question

I just want don't use "Managers" for each attribute and use some enum for that.

But it seems it is impossible or I am wrong?

So I try to replace

[RequiresRole("Managers")]

with

[RequiresRole(HardCodedRoles.Managers.ToString())]

...

public enum HardCodedRoles
{ 
            Administrators,
            Managers
}

Answer 1

How about a class instead of an enum, making the class static to avoid somebody new:ing it ?

public static class HardCodedRoles
{
    public const string Managers = "Managers";
    public const string Administrators = "Administrators";
}

[RequiresRole(HardCodedRoles.Managers)] 

Answer 2

You could also use the nameof keyword, i.e.:

[RequiresRole(nameof(HardCodedRoles.Managers))]

Answer 3

The reason you see the error is because ToString() is a method and thus the value cannot be calculated at compile time.

If you can use [RequiresRole(HardCodedRoles.Managers)] instead, you can perform the ToString elsewhere in your code, and this could give you the functionality you need. This will require that you change the parameter of your attribute from string to HardCodedRoles.

(I would imagine that using a const won't work, because the type of the parameter will still be string, so the input won't be restricted.)