asp.net core 2最简单的登录功能

 源代码在此

创建asp.net core Web Mvc项目

配置下选项

项目目录结构

 

在Models文件夹下新建两个实体类

    public class Test
    {
        public int Id { get; set; }
        [Required]
        [Display(Name = "某人")]
        public string Someone { get; set; }
        [Required]
        [Display(Name = "某事")]
        public string Something { get; set; }

    }

    public class User
    {
        public int Id { get; set; }
        [Required]
        [Display(Name = "用户名")]
        public string UserName { get; set; }
        [Display(Name = "密码")]
        [Required]
        public string UserPwd { get; set; }
        public string Nothing { get; set; }
    }

在项目文件夹下新建Data文件夹，新建DbContext类

 

    public class MyDbContext:DbContext
    {
        public MyDbContext(DbContextOptions<MyDbContext> options) : base(options) { }

        public DbSet<User> Users { get; set; }
        public DbSet<Test> Tests { get; set; }
    }

 

在Startup.cs文件中的ConfigureServices下添加dbcontext服务

 

        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            //sqlserver
            services.AddDbContext<MyDbContext>(x => x.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));


            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
        }

在appsettings.json下配置数据库连接字符串

打开程序包管理器控制台，执行生成数据库上下文和创建更新数据库命令

 

 

去数据库查看下表是否生成，并直接添加一个种子数据。

 

添加控制器和视图

 

生成之后的项目结构目录如下

 

在homecontroller中编写一个Login方法

 

public class HomeController : Controller
    {
        private readonly MyDbContext _context;

        public HomeController(MyDbContext context)
        {
            _context = context;
        }
        public IActionResult Index()
        {
            return View();
        }

        public IActionResult Privacy()
        {
            return View();
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }

        [HttpPost]
        public async Task<IActionResult> Login(User user)
        {
            var loginuser = await _context.Users.FirstOrDefaultAsync(u => u.UserName == user.UserName);
            if (loginuser == null)
                return BadRequest("没有该用户");
            if (loginuser.UserPwd != user.UserPwd)
                return BadRequest("密码错误");

            //声明对象创建
            var claims = new List<Claim>
            {
                new Claim(ClaimTypes.Name, user.UserName)
            };
            ClaimsIdentity userIdentity = new ClaimsIdentity(claims, "login");
            ClaimsPrincipal principal = new ClaimsPrincipal(userIdentity);
            await HttpContext.SignInAsync(principal);
            //写入HttpContext

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

在Startup中添加cookie认证服务并使用

public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cooki