Importing enum values from a file

Question

I have an enum Tokens, which basically I use as codes for a logging system

public enum Tokens {
    UnknownCommand = 100,
    SoftwareVersion = 101
}

then I use a custom Logging that accepts a Token enum and a message:

Logger.LogError(Tokens.UnknownCommand, "SomeMessage")

This works well, however in a future my Tokens might have to change, so I was thinking that I could maybe import the token values from a Keys file.

However assigning new values to the Tokens doesn't seem to be a valid option.

Token.SoftwareVersion = 3;

Is there a way I can have an enum where the values can be imported from a file or changed?

Answer 1

You Can use Enum Builder.

 public static void Main()
    {
        // Get the current application domain for the current thread.
        AppDomain currentDomain = AppDomain.CurrentDomain;

        // Create a dynamic assembly in the current application domain,
        // and allow it to be executed and saved to disk.
        AssemblyName aName = new AssemblyName("TempAssembly");
        AssemblyBuilder ab = currentDomain.DefineDynamicAssembly(
            aName, AssemblyBuilderAccess.RunAndSave);

        // Define a dynamic module in "TempAssembly" assembly. For a single-
        // module assembly, the module has the same name as the assembly.
        ModuleBuilder mb = ab.DefineDynamicModule(aName.Name, aName.Name + ".dll");

        // Define a public enumeration with the name "Elevation" and an
        // underlying type of Integer.
        EnumBuilder eb = mb.DefineEnum("YOUR_ENUM_NAME", TypeAttributes.Public, typeof(int));


        // Read from file and then add to the enum members this way.
        // Define two members
        eb.DefineLiteral("UnknownCommand", 0);
        eb.DefineLiteral("SoftwareVersion", 1);

        // Create the type and save the assembly.
        Type finished = eb.CreateType();
        ab.Save(aName.Name + ".dll");


        // To retrieve Enum members use Enum.GetValues(YOUR_ENUM_NAME)
        foreach( object o in Enum.GetValues(YOUR_ENUM_NAME) )
        {
            Console.WriteLine("{0}.{1} = {2}", finished, o, ((int) o));
        }
       //OR 

      Array values = Enum.GetValues ( typeof ( YOUR_ENUM_NAME ) );

        foreach (var val in values)
        {
            Console.WriteLine ( String.Format ( "{0}: {1}",
                    Enum.GetName ( typeof ( YOUR_ENUM_NAME ), val ),
                    val ) );
        }
    }