ASP.NET MVC:如何在给定特定条件下默认页面？

Question

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

public bool IsPasswordChangedFromInitial(string IdOfUser)

IdOfUserIdentity框架用户的Id字段在哪里.如果返回true,则表示不应显示更改密码页面,否则应导航到更改密码表单.一旦用户成功更改了密码,数据库标志就会被正确设置,并且不会再次提示他们更改密码(除非管理员手动强制更改).如何将此方法放在RouteConfig.cs文件中,目前我所拥有的:

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 }
                );
            }
        }
}

如何在defaults参数中添加条件构造,以便我可以使用该IsPasswordChangedFromInitial方法来决定是否转到密码更改页面？该页面位于/Account/ChangePassword.

编辑

根据评论,针对我的特定需求的相应操作方法是(我省略了不相关的代码):

登录发布动作:

[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()得到行动:

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

不知何故,返回的视图是RouteConfig.cs代替ChangePassword.cshtml页面的视图.谢谢.

Answer 1

我会用全局动作过滤器来做到这一点

你可以用方法创建一个动作过滤器

protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
    if (showChagePwPage)
    {
        //redirect to the change password page
        filterContext.Result = new RedirectToActionResult("ChangePassword", "Account");
    }

    base.OnActionExecuting(filterContext);
}

然后将其添加到全局操作过滤器中

GlobalFilters.Filters.Add(yourFilterContext);