asp.net-mvc - 我的 MVC 5 模板中没有 ApplicationRoleManager 类

Question

当我尝试将 app.CreatePerOwinContext(ApplicationRoleManager.Create) 添加到 configauth 时，我被告知 applicationRoleManager 不存在。有谁知道为什么吗？

using Microsoft.Owin.Security.OAuth;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.EntityFramework;
using Microsoft.AspNet.Identity.Owin;
using Microsoft.Owin;
using Microsoft.Owin.Security.Cookies;
using Microsoft.Owin.Security.DataProtection;
using Microsoft.Owin.Security.Google;
using Owin;
using System;
using LaCeibaNetv4.Models;

namespace LaCeibaNetv4
{
    public partial class Startup
    {
        // For more information on configuring authentication, please visit http://go.microsoft.com/fwlink/?LinkId=301864
        public void ConfigureAuth(IAppBuilder app)
        {
            // Configure the db context and user manager to use a single instance per request
            app.CreatePerOwinContext(ApplicationDbContext.Create);
            app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);

Answer 1

我遇到了同样的问题，并遇到了这段代码，我用它来将类添加到我的项目中:

public class ApplicationRoleManager : RoleManager<IdentityRole>
{
    public ApplicationRoleManager(IRoleStore<IdentityRole,string> roleStore)
    : base(roleStore) { }

    public static ApplicationRoleManager Create(
        IdentityFactoryOptions<ApplicationRoleManager> options, 
        IOwinContext context)
    {
        var manager = new ApplicationRoleManager(
            new RoleStore<IdentityRole>(context.Get<ApplicationDbContext>()));
        return manager;
    }
}

此外，请记住在启动时通过在 Startup.Auth.cs 中添加这段代码来配置它:

app.CreatePerOwinContext<ApplicationRoleManager>(Application‌​RoleManager.Create); 

完整文章可在此处获取:http://www.codeproject.com/Articles/762428/ASP-NET-MVC-and-Identity-Understanding-the-Basics