ASP.. NET MVC:如何在给定条件下默认为页面

我有一个名为PasswordChangeChecker.cs的类，它有一个从数据库返回用户是否更改了密码的方法。该方法的签名是:

public bool IsPasswordChangedFromInitial(string IdOfUser)

其中IdOfUser为Identity框架User的Id字段。如果它返回true，这意味着不应该显示更改密码页面，否则，它应该导航到更改密码表单。一旦用户成功地更改了密码，数据库标志将被适当地设置，并且不应该再次提示他们更改密码(除非由管理员手动强制执行)。我如何将此方法放在RouteConfig.cs文件中，目前我有:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
    namespace IdentityDevelopment
    {
        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 }
                );
            }
        }
}

我如何将条件构造添加到defaults参数中，以便我可以使用IsPasswordChangedFromInitial方法来决定是否进入密码更改页面?那一页在/Account/ChangePassword

编辑

根据注释，适合我特定需求的操作方法是(我省略了不相关的代码):

Login post action:

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Login(LoginModel details, string returnUrl)
            {
                if (ModelState.IsValid)
                {
                    AppUser user = await UserManager.FindAsync(details.Name,
                        details.Password);
                    if (user == null)
                    {
                        AppUser userByName = await UserManager.FindByNameAsync(details.Name);
                        if(userByName == null)
                        {
                            ModelState.AddModelError("", "Invalid username.");
                        }
                        else
                        {
                            //If this else is reached, it means the password entered is invalid.
                           //code for incrementing count of failed attempts and navigation to lock out page if needed
                        }
                    }
                    else
                    {
                        if(user.LockedOut)
                        {
                            //navigate to locked out page
                        }
                        else
                        {
                            PasswordChangeChecker PassCheck = new PasswordChangeChecker();
                            string userId = user.Id.ToString();
                            bool proceed = PassCheck.IsPasswordChangedFromInitial(userId);
                            //Authorize the user
                            ClaimsIdentity ident = await UserManager.CreateIdentityAsync(user,
                                                     DefaultAuthenticationTypes.ApplicationCookie);
                            ident.AddClaims(LocationClaimsProvider.GetClaims(ident));
                            ident.AddClaims(ClaimsRoles.CreateRolesFromClaims(ident));
                            AuthManager.SignOut();
                            AuthManager.SignIn(new AuthenticationProperties
                            {
                                IsPersistent = false
                            }, ident);
                            //persist login into db code

                            if (proceed)
                            {
                                //reset failed logins count
                                return Redirect(returnUrl);
                            }
                            else
                            {
                                return ChangePassword();
                            }
                        }

                    }
                }
                ViewBag.returnUrl = returnUrl;
                return View(details);
            }

ChangePassword() get action:

[HttpGet]
[Authorize]
public ActionResult ChangePassword()
{
   return View();             
}

返回的视图是RouteConfig.cs而不是ChangePassword.cshtml页面中的视图。谢谢你。