1.按照微软官方文档，如果要使用AttributeRoutes，需要在APP_START里的WebApiConfig.cs的Register方法中添加一行：config.MapHttpAttributeRoutes();
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
config.MapHttpAttributeRoutes();
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
// Uncomment the following line of code to enable query support for actions with an IQueryable or IQueryable
return type.
// To avoid processing unexpected or malicious queries, use the validation settings on QueryableAttribute to validate i
