ASP.Net Core -- Identity

ASP.Net Core Identity是ASP.Net Core默认的内置的身份认证授权系统,可以管理成员,角色等等之类的东西,默认使用的是Microsoft SqlServer,然后,它也支持外部的身份认证。

•  写个小例子,学习记录一下:

一个控制器:AccountController;两个视图:Login和Register;两个模型类:LoginViewModel.cs和RegisterViewModel.cs

•  ASP.Net Core Identity重点类:

UserManager<IdentityUser>:用来操作用户,比如:删除用户,添加用户....并把处理结果存储在一个地方,默认使用的SqlServer

SignInManager<IdentityUser>:主要用来对用户的身份认证的

•  代码示例:

新建一个AccountController控制器,并且注入以上两个重点类:

public class AccountController : Controller
    {
        private readonly SignInManager<IdentityUser> _signInManager;
        private readonly UserManager<IdentityUser> _userManager;
        public AccountController(SignInManager<IdentityUser> signInManager, 
            UserManager<IdentityUser> userManager)
        {
            _signInManager = signInManager;
            _userManager = userManager;
        }
        public IActionResult Login() {
            return View();
        }
        [HttpPost]
        public async Task<IActionResult> Login(LoginViewModel loginViewModel)
        {
            if (!ModelState.IsValid)
            {
                return View(loginViewModel);
            }
            var user = await _userManager.FindByNameAsync(loginViewModel.UserName);

            if (user != null)
            {
                var result = await _signInManager.PasswordSignInAsync(user, loginViewModel.Password, false, false);
                if (result.Succeeded)
                {
                    return RedirectToAction("Index", "Home");
                }
            }
            ModelState.AddModelError("", "用户名或密码不正确");
            return View(loginViewModel);
        }
        public IActionResult Register()
        {
            return View();
        }
        [HttpPost]
        public async Task<IActionResult> Register(RegisterViewModel registerViewModel)
        {
            if (ModelState.IsValid) 
            {
                var user = new IdentityUser
                {
                    UserName = registerViewModel.UserName
                };
                var result = await _userManager.CreateAsync(user, registerViewModel.Password);

                if (result.Succeeded)
                {
                    return RedirectToAction("Index", "Home");
                }
            };

            return View(registerViewModel);
        }
        public async Task<IActionResult> logout()
        {
            await _signInManager.SignOutAsync();

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

Login视图:

@model LoginViewModel
<h2>请登录或者<a asp-action="Register" asp-controller="Account">注册</a></h2>
<form asp-action="Login" asp-controller="Account" method="post">
    <div>
        <label asp-for="UserName"></label>
        <input  asp-for="UserName"/>
        <span asp-validation-for="UserName"></span>
    </div>
    <div>
        <label asp-for="Password"></label>
        <input asp-for="Password" />
        <span asp-validation-for="Password"></span>
    </div>
    <div>
        <input type="submit" value="提交" />
    </div>
    <div asp-validation-summary="All"></div>
</form>

Register视图:

@model RegisterViewModel
<h2>注册</h2>
<form asp-action="Register" asp-controller="Account" method="post">
    <div>
        <label asp-for="UserName"></label>
        <input asp-for="UserName" />
        <span asp-validation-for="UserName"></span>
    </div>
    <div>
        <label asp-for="Password"></label>
        <input asp-for="Password" />
        <span asp-validation-for="Password"></span>
    </div>
    <div>
        <input type="submit" value="提交" />
    </div>
    <div asp-validation-summary="All"></div>
</form>

Layout布局页:

<!DOCTYPE html>
@using Microsoft.AspNetCore.Identity
@inject SignInManager<IdentityUser> SignInManager
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title></title>
    <link href="~/node_modules/bootstrap/dist/css/bootstrap.css" rel="stylesheet" />
</head>
<body>
    <nav class="navbar navbar-light bg-light">
        <a class="navbar-brand" href="#">Navbar</a>
        @if (SignInManager.IsSignedIn(User))
        {
            <form asp-action="Logout" asp-controller="Account" method="post" id="logoutForm">
                <ul class="navbar-nav mr-auto">
                    <li>
                        <a href="javascript:document.getElementById('logoutForm').submit()">登出</a>
                    </li>
                </ul>
            </form>
        }
        else
        {
            <ul class="navbar-nav mr-auto">
                <li>
                    <a asp-action="Register" asp-controller="Account">注册</a>
                </li>
                <li>
                    <a asp-action="Login" asp-controller="Account">登录</a>
                </li>
            </ul>
        }
    </nav>
    <div>
        @RenderBody()
    </div>
    <script src="~/node_modules/jquery/dist/jquery.js"></script>
    <script src="~/node_modules/jquery-validation/dist/jquery.validate.js"></script>
    <script src="~/node_modules/jquery-validation-unobtrusive/dist/jquery.validate.unobtrusive"></script>
</body>
</html>

LoginViewModel.cs和RegisterViewModel.cs内容一样,如下:

public class LoginViewModel
    {
        [Required]
        [Display(Name ="用户名")]
        public string   UserName { get; set; }
        [Required]
        [Display(Name ="密码")]
        [DataType(DataType.Password)]
        public string Password { get; set; }
    }

 

最后,注册服务,进行数据迁移:

在startup.cs注册服务:

services.AddDbContext<IdentityDbContext>(options => options.UseMySql(_configuration.GetConnectionString("MysqlConnection"),b=>b.MigrationsAssembly("Tutorials.Web")));
            services.AddDefaultIdentity<IdentityUser>().AddEntityFrameworkStores<IdentityDbContext>();

            services.Configure<IdentityOptions>(options =>
            {
                // Password settings.
                options.Password.RequireDigit = false;
                options.Password.RequireLowercase = false;
                options.Password.RequireNonAlphanumeric = false;
                options.Password.RequireUppercase = false;
                options.Password.RequiredLength = 1;
                options.Password.RequiredUniqueChars = 1;

                // Lockout settings.
                options.Lockout.DefaultLockoutTimeSpan = TimeSpan.FromMinutes(5);
                options.Lockout.MaxFailedAccessAttempts = 5;
                options.Lockout.AllowedForNewUsers = false;

                // User settings.
                options.User.AllowedUserNameCharacters =
                "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._@+";
                options.User.RequireUniqueEmail = false;
            });

在Configure理添加:

app.UseAuthentication();

然后进行迁移,打开Nuget包控制台,首先输入迁移命令:

Add-migration initialIdentity -Context IdentityDbContext

然后输入更新数据库命令:

update database -Context IdentityDbContext

这个时候,数据库中会多几张表,用户存放用户信息。这样,一个小demo就实现了,用户登录,注册,登录成功或者注册成功后跳转到index页,并隐藏登录和注册按钮,显示登出按钮。

posted @ 2020-08-18 21:20  初晨~  阅读(320)  评论(0编辑  收藏  举报