Question

I have the following method:

    public static IEnumerable<SelectListItem> GetSpacedOptions<T>() where T : struct
    {
        var t = typeof(T);
        if (!t.IsEnum)
        {
            throw new ArgumentException("Not an enum type");
        }
        var options = Enum.GetValues(t).Cast<T>()
            .Select(x => new SelectListItem
            {
                Value = ((int) Enum.ToObject(t, x)).ToString(),
                Text = Regex.Replace(x.ToString(), "([A-Z])", " $1").Trim()
            });
        return options;
    }

What I need to do is to add a boolean parameter called zeroPad. So that if it is not supplied the method will be unchanged but if supplied then the Text output will be always a two digit string such as “01”, “04” or “77”.

How can I add that parameter. There seems no place to add it.

Answer 1

How about providing the default value as false.-

public static IEnumerable<TestClass> GetSpacedOptions<T>(bool zeroPad = false)
                                              where T : struct

User can call it in both ways –

GetSpacedOptions<MyEnum>(true);

If value is not specified, zeroPad value will be false by default

GetSpacedOptions<MyEnum>();