不能获得用户与角色Asp.net MVC5身份2.2.1依赖注入

大家好!

在阅读了我上一个问题的MRebati提示后，我搜索并理解了不将unity和OWIN混合的重要性，以及如何依赖注入ASP.net身份。

首先，我不想被标记为问同样的问题，即使我是，但是现在我的代码与上一个问题相比有了一点变化。

现在我得到了一个不同的错误信息:

对象引用未设置为对象的实例。

这意味着当调用我的自定义Usermanager时，我仍然得到null。

我期望的结果是获得所有用户及其接收角色的列表:

XXXXXX ------ Admin

YYYYYY ------ Manager

关于我的项目的信息:

MVC: 5.2.3

身份:2.2.1

实体框架:代码优先2.2.1

我也试图使用Unity依赖注入。

下面是我的代码:

控制器:

public ActionResult GetUsersWithRoles(string roleName)
        {
            ViewBag.UsersWithRoles = _userManager.GetUsersInRole(context, roleName);

            return View(ViewBag.UsersWithRoles);
        }

我的自定义用户管理器在IdentityConfig.cs:

    public class ApplicationUserManager : UserManager<ApplicationUser>
        {
            public ApplicationUserManager(IUserStore<ApplicationUser> store)
                : base(store)
            {
/// the create part which is moved from the default /// 
          public IQueryable<ApplicationUser> GetUsersInRole(ApplicationDbContext context, string roleName)
                {
                    if (context !=null && roleName !=null)
                    {
                        var roles = context.Roles.Where(r => r.Name == roleName);
                        if (roles.Any())
                        {
                            var roleId = roles.First().Id;
                            return from user in context.Users
                                   where user.Roles.Any(r => r.RoleId == roleId)
                                   select user;
                        }
                    }
                return null;
            }

最后我的观点:

@using (Html.BeginForm("GetUsersWithRoles", "Roles"))
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)
    <h3>Roles for this user </h3>
    foreach (IQueryables in ViewBag.UsersWithRoles)
    {
        <tr>
            <td>@s</td>
        </tr>
    }

}

我的unityConfig.cs

using System;
using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
using eCommerce.DAL.Repositories;
using eCommerce.Model;
using eCommerce.Contracts.Repositories;
using eCommerce.WebUI.Controllers;
using eCommerce.WebUI.Models;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.EntityFramework;
namespace eCommerce.WebUI.App_Start
{
    public class UnityConfig
    {
        #region Unity Container
        private static Lazy<IUnityContainer> container = new Lazy<IUnityContainer>(() =>
        {
            var container = new UnityContainer();
            RegisterTypes(container);
            return container;
        });

        public static IUnityContainer GetConfiguredContainer()
        {
            return container.Value;
        }
        #endregion

        public static void RegisterTypes(IUnityContainer container)
        {
            container.RegisterType<IRepositoryBase<Customer>, CustomerRepository>();
            container.RegisterType<IRepositoryBase<Product>, ProductRepository>();
            container.RegisterType<IRepositoryBase<Basket>, BasketRepository>();
            container.RegisterType<IRepositoryBase<Voucher>, VoucherRepository>();
            container.RegisterType<IRepositoryBase<VoucherType>, VoucherTypeRepository>();
            container.RegisterType<IRepositoryBase<BasketVoucher>, BasketVoucherRepository>();
            container.RegisterType<IRepositoryBase<BasketItem>, BasketItemsRepository>();
            //container.RegisterType<AccountController>(new InjectionConstructor());
            container.RegisterType<ApplicationDbContext>(new PerRequestLifetimeManager());
            container.RegisterType<ApplicationUserManager>();
            container.RegisterType <IUserStore<ApplicationUser>, UserStore<ApplicationUser>>(new InjectionConstructor(typeof(ApplicationDbContext)));

        }
    }
}

下面是RolesController.cs的构造函数:

 private ApplicationDbContext context;
        private ApplicationUserManager _userManager;
        public RolesController(ApplicationDbContext context, ApplicationUserManager _userManager)
        {
            this.context = context;
            this._userManager = _userManager;
        }

以下是我的startup.cs:

ssembly: OwinStartupAttribute(typeof(eCommerce.WebUI.Startup))]
namespace eCommerce.WebUI
{
    public partial class Startup
    {
        internal static IDataProtectionProvider DataProtectionProvider { get; private set; }
        public void Configuration(IAppBuilder app)
        {
            ConfigureAuth(app);
            //app.CreatePerOwinContext(ApplicationDbContext.Create);
            //app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
            app.CreatePerOwinContext(() => DependencyResolver.Current.GetService<ApplicationUserManager>()); // <-
            DataProtectionProvider = app.GetDataProtectionProvider();
        }

    }
}

这是我的全局。asax:

 public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
            AreaRegistration.RegisterAllAreas();
            var context = new ApplicationDbContext();
            if (!context.Users.Any(user => user.UserName == "Email@hotmail.com"))
            {
                var userStore = new UserStore<ApplicationUser>(context);
                var userManager = new UserManager<ApplicationUser>(userStore);
                var applicationUser = new ApplicationUser() { UserName = "Email@hotmail.com" };
                userManager.Create(applicationUser, "Password");
                var roleStore = new RoleStore<IdentityRole>(context);
                var roleManager = new RoleManager<IdentityRole>(roleStore);
                roleManager.Create(new IdentityRole("Admin"));
                userManager.AddToRole(applicationUser.Id, "Admin");
            }
        }
    }

从我的rolesController创建方法:

[HttpPost]
        public ActionResult Create(FormCollection collection)
        {
            try
            {
                context.Roles.Add(new IdentityRole
                {
                    Name = collection["RoleName"]
                });
                context.SaveChanges();
                ViewBag.ResultMessage = "Role created successfully !";
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

谢谢你的时间。

public class ApplicationUserManager : UserManager<ApplicationUser>
{
    private readonly ApplicationDbContext context;
    public ApplicationUserManager(ApplicationDbContext context, /*... other parameters*/) : base(store)
    {
        this.context = context;
        //... other configuration bits
    }
    public IEnumerable<ApplicationUser> GetUsersInRole(string roleName)
    {
        if (String.IsNullOrWhiteSpace(roleName))
        {
            throw new ArgumentNullException(nameof(roleName));
        }
        var role = context.Roles.FirstOrDefault(r => r.Name == roleName);
        if (role == null)
        {
            throw new Exception($"Role with this name not found: {roleName}");
        }
        var users = context.Users.Where(u => u.Roles.Any(r => r.RoleId == role.Id)).ToList();
        return users;
    }
    // the rest of User manager methods
}

public class UsersWithRoleController : Controller
{
    private readonly ApplicationUserManager userManager;
    public UsersWithRoleController(ApplicationUserManager userManager)
    {
        this.userManager = userManager;
    }
    public ActionResult GetUsersWithRoles(string roleName)
    {
        var users = userManager.GetUsersInRole(roleName);
        var viewModel = new GetUsersWithRolesViewModel()
        {
            RoleName = roleName,
            Users = users,
        };
        return View(viewModel);
    }
}
public class GetUsersWithRolesViewModel
{
    public String RoleName { get; set; }
    public IEnumerable<ApplicationUser> Users { get; set; }
}

@model IoCIdentity.Controllers.GetUsersWithRolesViewModel
@{
    ViewBag.Title = "title";
}
<h2>List of users in role @Model.RoleName</h2>
<ul>
    @foreach (var user in @Model.Users)
    {
        <li>@user.UserName</li>
    }
</ul>