在webAPI2.2中有支持，参考地址：https://docs.microsoft.com/en-us/aspnet/web-api/overview/releases/whats-new-in-aspnet-web-api-22#ARI，具体做法：
public class BaseController : ApiController
{
[Route("{id:int}")]
public string Get(int id)
{
return "Success:" + id;
}
}
[RoutePrefix("api/values")]
public class ValuesController : BaseController
{
}
public class CustomDirectRouteProvider : DefaultDirectRouteProvider
{
protected override IReadOnlyList<IDirectRouteFactory>
GetActionRouteFactories(HttpActionDescriptor actionDescriptor)
{
return actionDescriptor.GetCustomAttributes<IDirectRouteFactory>
(inherit: true);
}
}
///WebApiConfig.cs中加上这个配置
config.MapHttpAttributeRoutes(new CustomDirectRouteProvider());
在webAPI的BaseController上使用RoutePrefix
原文：http://www.cnblogs.com/skybreak/p/6846818.html