ASP.NET MVC 4路由用户名/操作问题

Question

我目前正在开发一个asp.net mvc 4应用程序,我需要以下类型的URL:

需要路由的网址

1. http://www.mysite.com/foo/user1 <------- {username}
2. http://www.mysite.com/foo/edit
3. http://www.mysite.com/foo/delete/1
4. http://www.mysite.com/bar/user1 <------- {username}
5. http://www.mysite.com/bar/edit
6. http://www.mysite.com/bar/delete/1

我遇到的问题是当前{username}被视为一个动作,所以为了解决这个问题我实现了以下路由,但这意味着每次我想实现一个新动作,或者有一个需要的控制器{username},我必须更新我的路线:

仅显示Foo路线

routes.MapRoute("FooSomeAction", "foo/someaction", new { controller = "Food", action = "SomeAction" });            
routes.MapRoute("FooDelete", "foo/delete/{id}", new { controller = "Food", action = "Delete" });            


routes.MapRoute(
    "FooProfile",
    "foo/{username}",
    new { controller = "Foo", action = "Index", username = "" }
);


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

2个问题

1)有没有办法在没有硬编码所有路由的情况下实现上述网址？

2)处理某人使用恰好与控制器或操作名称相同的用户名的情况的最佳方法是什么？

DotnetShadow

Answer 1

您可以创建一个自定义路由约束来检查用户名是否存在于控制器的可能操作中。如果它找到一个操作匹配，它将失败并使用您的默认路由（例如编辑）。出于性能原因，您可能想要缓存该列表，但我将其留给您。

    private static List<Type> GetSubClasses<T>()
    {
        return Assembly.GetCallingAssembly().GetTypes().Where(
            type => type.IsSubclassOf(typeof(T))).ToList();
    }

    public static  List<string> GetActionNames(string controllerName)
    {
        controllerName = controllerName + "Controller";
        var controller = GetSubClasses<Controller>().FirstOrDefault(c => c.Name == controllerName);

        var names = new List<string>();
        if (controller != null)
        {
            var methods = controller.GetMethods(BindingFlags.Public | BindingFlags.Instance);
            foreach (var info in methods)
            {
                if (info.ReturnType == typeof(ActionResult))
                {
                    names.Add(info.Name);
                }
            }

        }
        return names;
    }


    public class UsernameNotAction : IRouteConstraint
    {
        public bool Match
            (
                HttpContextBase httpContext,
                Route route,
                string parameterName,
                RouteValueDictionary values,
                RouteDirection routeDirection
            )
        {
            int i = 0;
            var username = values["username"];
            var actionList =  GetActionNames(values["controller"].ToString());

            return !actionList.Any(a => a.ToUpper() == username.ToString().ToUpper());
        }
    }


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

        routes.MapRoute(
            "FooProfile",
            "{controller}/{username}",
            new { controller = "Home", action = "Index2", username = "" },
            new { IsParameterAction = new UsernameNotAction() }
        );
        // Default route
        routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}",
            new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }