Asp.net webapi enum parameter with default value

Question

I have a controller

   [HttpGet]
    [RoutePrefix(\"api/products/{productId}\")] 
    public HttpResponseMessage Products(int productId,TypeEnum ptype=TypeEnum.C         


        

Answer 1

This type of validation should be handled in pipeline not in controller.

    public abstract class ETagMatchAttribute : ParameterBindingAttribute
{
    private ETagMatch _match;

    public ETagMatchAttribute(ETagMatch match)
    {
        _match = match;
    }

    public override HttpParameterBinding GetBinding(HttpParameterDescriptor parameter)
    {
        if (parameter.ParameterType == typeof(ETag))
        {
            return new ETagParameterBinding(parameter, _match);
        }
        return parameter.BindAsError("Wrong parameter type");
    }
}

something like this. refer to MSDN link for detailed explanation