【ASP.NET Core快速入门】（十四）MVC开发：UI、 EF + Identity实现、注册实现、登陆实现

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 Register()        
　　　　 {    
　　
　　　　　　　　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; }

    }

}

@{

    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>

@{

    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Identity

services.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

注册实现

前面虽然可以注册了，但是我们注册完成后并没有生成Cookies信息。所以我们要在Register方法中进行登陆生成Cookies

完整的注册方法如下：

[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)

    {

        //注册完成登录生成cookies信息

        await _signInManager.SignInAsync(identityUser, new AuthenticationProperties { IsPersistent = true });

        return RedirectToAction("Index", "Home");

    }

    return View();

}

一般来说，如果用户已经注册或者登陆了，注册和登陆按钮是要隐藏的，所以我们接下来要修改_Layout.cshtml视图页面判断注册/登陆按钮是否应该隐藏

完整的_Layout.cshtml代码:

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8" />

    <meta name="viewport" content="width=device-width, initial-scale=1.0" />

    <title>@ViewData["Title"] - MvcCookieAuthSample</title>

    <environment include="Development">

        <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.css" />

        <link rel="stylesheet" href="~/css/site.css" />

    </environment>

    <environment exclude="Development">

        <link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.7/css/bootstrap.min.css"

              asp-fallback-href="~/lib/bootstrap/dist/css/bootstrap.min.css"

              asp-fallback-test-class="sr-only" asp-fallback-test-property="position" asp-fallback-test-value="absolute" />

        <link rel="stylesheet" href="~/css/site.min.css" asp-append-version="true" />

    </environment>

</head>

<body>

    <nav class="navbar navbar-inverse navbar-fixed-top">

        <div class="container">

            <div class="navbar-header">

                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">

                    <span class="sr-only">Toggle navigation</span>

                    <span class="icon-bar"></span>

                    <span class="icon-bar"></span>

                    <span class="icon-bar"></span>

                </button>

                <a asp-area="" asp-controller="Home" asp-action="Index" class="navbar-brand">MvcCookieAuthSample</a>

            </div>

            <div class="navbar-collapse collapse">

                <ul class="nav navbar-nav">

                    <li><a asp-area="" asp-controller="Home" asp-action="Index">Home</a></li>

                    <li><a asp-area="" asp-controller="Home" asp-action="About">About</a></li>

                    <li><a asp-area="" asp-controller="Home" asp-action="Contact">Contact</a></li>

                </ul>

                @if (User.Identity.IsAuthenticated)

                {

                    <form asp-action="Logout" asp-controller="Account" method="post">

                        <ul class="nav navbar-nav navbar-right">

                            <li>

                                <a title="Welcome" asp-controller="Admin" asp-action="Index">@User.Identity.Name</a>

                            </li>

                            <li>

                                <button type="submit" class="btn btn-link navbar-btn navbar-link">Log out</button>

                            </li>

                        </ul>

                    </form>

                }

                else

                {

                    <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>

                }

            </div>

        </div>

    </nav>

    <div class="container body-content">

        @RenderBody()

        <hr />

        <footer>

            <p>&copy;  - MvcCookieAuthSample</p>

        </footer>

    </div>

    <environment include="Development">

        <script src="~/lib/jquery/dist/jquery.js"></script>

        <script src="~/lib/bootstrap/dist/js/bootstrap.js"></script>

        <script src="~/js/site.js" asp-append-version="true"></script>

    </environment>

    <environment exclude="Development">

        <script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-2.2.0.min.js"

                asp-fallback-src="~/lib/jquery/dist/jquery.min.js"

                asp-fallback-test="window.jQuery"

                crossorigin="anonymous"

                integrity="sha384-K+ctZQ+LL8q6tP7I94W+qzQsfRV2a+AfHIi9k8z8l9ggpc8X+Ytst4yBo/hH+8Fk">

        </script>

        <script src="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.7/bootstrap.min.js"

                asp-fallback-src="~/lib/bootstrap/dist/js/bootstrap.min.js"

                asp-fallback-test="window.jQuery && window.jQuery.fn && window.jQuery.fn.modal"

                crossorigin="anonymous"

                integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa">

        </script>

        <script src="~/js/site.min.js" asp-append-version="true"></script>

    </environment>

    @RenderSection("Scripts", required: false)

</body>

</html>

这时候登陆的之后的导航栏信息就有了

登陆实现

我们接下来实现一下登陆逻辑，我们首先新建一个HttpPost的Login的Action

[HttpPost]

public async Task<IActionResult> Login(RegisterViewModel loginViewModel)

{

    var user= await _userManager.FindByEmailAsync(loginViewModel.Email);

    if (user==null)

    {

        //异常先不写，后期统一收集

    }

    //账号密码先不做验证，需要可以自己写

    await _signInManager.SignInAsync(user, new AuthenticationProperties { IsPersistent = true });

    return RedirectToAction("Index", "Home");

}

然后我们把原来的Logout也顺便修改一下，不能是return OK();而要跳转到首页

//登出

public async Task<IActionResult> Logout()

{

    //HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);

    //return Ok();

    await _signInManager.SignOutAsync();

    return RedirectToAction("Index", "Home");

}

接下来我们修改一下Login.cshtml页面

@{

    ViewData["Title"] = "Login";

}

@using MvcCookieAuthSample.ViewModels;

@model RegisterViewModel;

<div class="row">

    <div class="col-md-4">

        <section>

            <form  method="post" asp-controller="Account" asp-action="Login">

                <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>

接下来我们可以运行一下登陆注册，即可成功登陆后跳转到首页，注册后跳转倒是首页