带有URL c＃的Web-Api版本控制

我现在已经挣扎了好几天，我正在尝试使用url后缀来实现我的API版本。fe http：// localhost / api / v1 / sites和http：// localhost / api / v2 / sites。

我猜我离得很近，但是突然间我把一切搞砸了。

非常感谢您的帮助。

现在我收到：“ System.invalidOperationException：”映射到约束键“ apiVersion”的约束类型“ ApiVersionRouteConstraint”必须实现IhttpRouteConstraint接口。在Global.asax.cs上

Global.asax.cs

using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace HIDDEN
{
    public class WebApiApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            GlobalConfiguration.Configure(WebApiConfig.Register);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }
    }
}

WebApiConfig.cs

using Microsoft.AspNetCore.Mvc.Routing;
using Microsoft.Owin.Security.OAuth;
using System.Web.Http;
using System.Web.Http.Routing;

namespace HIDDEN
{
    public static class WebApiConfig
        {
        public static void Register(HttpConfiguration config)
        {
            // Web API configuration and services  
            // Configure Web API to use only bearer token authentication.  
            config.SuppressDefaultHostAuthentication();
            config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));

            var contraintResolver = new DefaultInlineConstraintResolver()
            {
                ConstraintMap =
                {
                    ["apiVersion"] = typeof(ApiVersionRouteConstraint)
                }
            };

            // Web API routes  
            config.MapHttpAttributeRoutes(contraintResolver);
            config.AddApiVersioning(o =>
            {
                o.AssumeDefaultVersionWhenUnspecified = true;
                //o.DefaultApiVersion = new ApiVersion(1, 0);
            });

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                //routeTemplate: "api/v{version:apiVersion}/{controller}/{id}",
                routeTemplate: "api/v{version:apiVersion}/{controller}",
                //routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );

            // WebAPI when dealing with JSON & JavaScript!  
            // Setup json serialization to serialize classes to camel (std. Json format)  
            var formatter = GlobalConfiguration.Configuration.Formatters.JsonFormatter;
            formatter.SerializerSettings.ContractResolver = new     Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver();

            // Adding JSON type web api formatting.  
            config.Formatters.Clear();
            config.Formatters.Add(formatter);

        }
    }
}   

RouteConfig.cs

using System.Web.Mvc;
using System.Web.Routing;


namespace HIDDEN
{
    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );
        }
    }
}

SitesController

using FirebirdSql.Data.FirebirdClient;
using System;
using System.Web.Http;
using System.Configuration;
using System.Collections;
using Microsoft.Web.Http;

        namespace HIDDEN.Controllers.V1
        {
        [ApiVersion("1.0")]
        [Route("api/v{version:apiVersion}/[controller]")]

        public class SitesController : ApiController
        {
              //code for V1
        }

        namespace HIDDEN.Controllers.V2
        {
        [ApiVersion("2.0")]
        [Route("api/v{version:apiVersion}/[controller]")]

        public class SitesController : ApiController
        {
              //code for V2
        }
    }