前言
之前我们进行了MVC的web页面的Cookie-based认证实现，接下来的开发我们要基于之前的MvcCookieAuthSample项目做修改。
MvcCookieAuthSample项目地址：http://www.cnblogs.com/wyt007/p/8128186.html
UI
我们首先在AccountController中添加两个Action
???????public IActionResult SignIn() ???????{ ???????????return View(); ???????} ???????public IActionResult Login() ???????{ ???????????return View(); ???????}然后在Views文件夹下新增Account文件夹并新增Register.cshtml与Login.cshtml视图，样式我们尽量从上一节的Identity视图中拷贝过来。
我们还需要新建一个ViewModels，在ViewModels中新建RegisterViewModel.cs来接收表单提交的值以及来进行强类型视图
namespace MvcCookieAuthSample.ViewModels{ ???public class RegisterViewModel ???{ ???????//邮箱 ???????public string Email { get; set; } ???????//密码 ???????public string Password { get; set; } ???????//确认密码 ???????public string ConfirmedPassword { get; set; } ???}}Register.cshtml代码（只保留部分拷贝过来的内容，并加入强类型视图引用）：
@{ ???ViewData["Title"] = "Register";}@using MvcCookieAuthSample.ViewModels;@model RegisterViewModel;<h2>@ViewData["Title"]</h2><h3>@ViewData["Message"]</h3><div class="row"> ???<div class="col-md-4"> ???????<form ?method="post"> ???????????<h4>Create a new account.</h4> ???????????<hr /> ???????????<div class="form-group"> ???????????????<label asp-for="Email"></label> ???????????????<input asp-for="Email" class="form-control" /> ???????????</div> ???????????<div class="form-group"> ???????????????<label asp-for="Password"></label> ???????????????<input asp-for="Password" class="form-control" /> ???????????</div> ???????????<div class="form-group"> ???????????????<label asp-for="ConfirmedPassword"></label> ???????????????<input asp-for="ConfirmedPassword" class="form-control" /> ???????????</div> ???????????<button type="submit" class="btn btn-default">Register</button> ???????</form> ???</div></div>Login.cshtml代码（只保留部分拷贝过来的内容，并加入强类型视图引用）：
@{ ???ViewData["Title"] = "Login";}@using MvcCookieAuthSample.ViewModels;@model RegisterViewModel;<div class="row"> ???<div class="col-md-4"> ???????<section> ???????????<form ?method="post"> ???????????????<h4>Use a local account to log in.</h4> ???????????????<hr /> ???????????????<div class="form-group"> ???????????????????<label asp-for="Email"></label> ???????????????????<input asp-for="Email" class="form-control" /> ???????????????</div> ???????????????<div class="form-group"> ???????????????????<label asp-for="Password"></label> ???????????????????<input asp-for="Password" type="password" class="form-control" /> ???????????????</div> ???????????????<div class="form-group"> ???????????????????<button type="submit" class="btn btn-default">Log in</button> ???????????????</div> ???????????</form> ???????</section> ???</div></div>然后在_Layout.cshtml中添加导航代码：
<ul class="nav navbar-nav navbar-right"> ???<li><a asp-area="" asp-controller="Account" asp-action="Register">Register</a></li> ???<li><a asp-area="" asp-controller="Account" asp-action="Login">Log in</a></li></ul>
然后运行网站，UI已经实现
EF + Identity实现
EF实现
首先我们添加一个Data文件夹，由于VSCode的代码提示不是很好，接下来我们用VS2017开发。
我们首先在Models文件夹下面新建ApplicationUser.cs与ApplicationUserRole.cs
ApplicationUser.cs代码：
using Microsoft.AspNetCore.Identity;namespace MvcCookieAuthSample.Models{ ???public class ApplicationUser:IdentityUser<int>//不加int的话是默认主键为guid ???{ ???}}ApplicationUserRole.cs代码：
using Microsoft.AspNetCore.Identity;namespace MvcCookieAuthSample.Models{ ???public class ApplicationUserRole: IdentityRole<int>//不加int的话是默认主键为guid ???{ ???}}然后在Data文件夹下新建一个ApplicationDbContext.cs类，使它继承IdentityDbContext
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;using Microsoft.EntityFrameworkCore;using MvcCookieAuthSample.Models;namespace MvcCookieAuthSample.Data{ ???public class ApplicationDbContext:IdentityDbContext<ApplicationUser, ApplicationUserRole,int> ???{ ???????public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options):base(options) ???????{ ???????} ???}}然后我们需要在Startup.cs添加EF的注册进来
//使用配置ApplicationDbContext使用sqlserver数据库，并配置数据库连接字符串services.AddDbContext<ApplicationDbContext>(options=> { ???options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"));});然后我们需要在appsettings.json中配置数据库连接字符串
"ConnectionStrings": { ?"DefaultConnection": "Server=192.168.1.184;Database=aspnet-IdentitySample-9A22BB3E-8D53-4F44-B533-2EF927C959DE;Trusted_Connection=True;MultipleActiveResultSets=true;uid=sa;pwd=123456"}EF实现结束
Identity实现
我们需要在Startup.cs添加Identity的注册进来
//配置Identityservices.AddIdentity<ApplicationUser, ApplicationUserRole>() ???.AddEntityFrameworkStores<ApplicationDbContext>() ???.AddDefaultTokenProviders();
由于默认的Identity在密码上限制比较严格，我们把它改的宽松简单一点（不设置也行）
//修改Identity配置services.Configure<IdentityOptions>(options =>{ ???options.Password.RequireLowercase = false;//需要小写 ???options.Password.RequireNonAlphanumeric = false;//需要字母 ???options.Password.RequireUppercase = false;//需要大写});然后我们把认证的地址改成/Account/Login
然后我们修改AccountController，加入以下代码
private UserManager<ApplicationUser> _userManager;//创建用户的private SignInManager<ApplicationUser> _signInManager;//用来登录的//依赖注入public AccountController(UserManager<ApplicationUser> userManager, SignInManager<ApplicationUser> signInManager){ ???_userManager = userManager; ???_signInManager = signInManager;}[HttpPost]public async Task<IActionResult> Register(RegisterViewModel registerViewModel){ ???var identityUser = new ApplicationUser ???{ ???????Email = registerViewModel.Email, ???????UserName = registerViewModel.Email, ???????NormalizedUserName = registerViewModel.Email ???}; ???var identityResult=await _userManager.CreateAsync(identityUser, registerViewModel.Password); ???if (identityResult.Succeeded) ???{ ???????return RedirectToAction("Index", "Home"); ???} ???return View();}完整的AccountController
using System;using System.Collections.Generic;using System.Diagnostics;using System.Linq;using System.Threading.Tasks;using Microsoft.AspNetCore.Mvc;using MvcCookieAuthSample.Models;using Microsoft.AspNetCore.Authorization;using Microsoft.AspNetCore.Authentication;using Microsoft.AspNetCore.Authentication.Cookies;using System.Security.Claims;using MvcCookieAuthSample.ViewModels;using Microsoft.AspNetCore.Identity;namespace MvcCookieAuthSample.Controllers{ ???public class AccountController : Controller ???{ ???????private UserManager<ApplicationUser> _userManager;//创建用户的 ???????private SignInManager<ApplicationUser> _signInManager;//用来登录的 ???????//依赖注入 ???????public AccountController(UserManager<ApplicationUser> userManager, SignInManager<ApplicationUser> signInManager) ???????{ ???????????_userManager = userManager; ???????????_signInManager = signInManager; ???????} ???????public IActionResult Register() ???????{ ???????????return View(); ???????} ???????[HttpPost] ???????public async Task<IActionResult> Register(RegisterViewModel registerViewModel) ???????{ ???????????var identityUser = new ApplicationUser ???????????{ ???????????????Email = registerViewModel.Email, ???????????????UserName = registerViewModel.Email, ???????????????NormalizedUserName = registerViewModel.Email ???????????}; ???????????var identityResult=await _userManager.CreateAsync(identityUser, registerViewModel.Password); ???????????if (identityResult.Succeeded) ???????????{ ???????????????return RedirectToAction("Index", "Home"); ???????????} ???????????return View(); ???????} ???????public IActionResult Login() ???????{ ???????????return View(); ???????} ???????//登陆 ???????public IActionResult MakeLogin() ???????{ ???????????var claims=new List<Claim>(){ ???????????????new Claim(ClaimTypes.Name,"wyt"), ???????????????new Claim(ClaimTypes.Role,"admin") ???????????}; ???????????var claimIdentity= new ClaimsIdentity(claims,CookieAuthenticationDefaults.AuthenticationScheme); ???????????HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme,new ClaimsPrincipal(claimIdentity)); ???????????return Ok(); ???????} ???????//登出 ???????public IActionResult Logout() ???????{ ???????????HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme); ???????????return Ok(); ???????} ???}}接下来我们重新生成一下，我们需要执行shell命令生成一下数据库，只有添加 Microsoft.EntityFrameworkCore.Tools 才会生成成功，否则会报以下错误
执行命令总是提示 未找到与命令“dotnet-ef”匹配的可执行文件，根据网上的解决办法引用 Microsoft.EntityFrameworkCore.Tools 问题依旧不能得到解决。
解决办法：
右击项目弹出菜单点击编辑***.csprog,增加如下配置。
<ItemGroup> ???<DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" /></ItemGroup>
执行增加配置命令后
这时候Data文件夹下已经有新增的数据库更新配置文件了
然后我们执行更新命令，执行成功后我们就可以看到数据库表已经生成了
接下来我们运行一下网站进行注册，注册成功，已经存储进数据库
【ASP.NET Core快速入门】（十四）MVC开发：UI、 EF + Identity实现
原文地址：https://www.cnblogs.com/wyt007/p/8204731.html