固然,你也能够直接以前前往coding仓库查看源码,要是发现bug记得提醒我啊~ LoginDemo地址css
完整Login.cshtml视图代码戳这里-共计55行
效果预览图html
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>登陆界面</title> <meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no"> <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"> <style type="text/css"> body { color: #fff; font-family: "微软雅黑"; font-size: 14px; background: url('https://dn-coding-net-production-pp.qbox.me/96ec8cc7-0e5f-4217-b853-4a88c15579f3.png') no-repeat; } .wrap1 { position: absolute; top: 0; right: 0; bottom: 0; left: 0; margin: auto; height: 450px; } /*把整个屏幕真正撑开--并且能本身实现居中*/ .main_content { background: url(https://dn-coding-net-production-pp.qbox.me/2ed70a05-04ad-4ccf-81d4-bc1fad2b6e41.png) repeat; margin-left: auto; margin-right: auto; text-align: left; float: none; border-radius: 8px; } .form-group { position: relative; } .login_btn { display: block; background: #3872f6; color: #fff; font-size: 15px; width: 100%; line-height: 50px; border-radius: 3px; border: none; } .login_input { width: 100%; border: 1px solid #3872f6; border-radius: 3px; line-height: 40px; padding: 2px 5px 2px 30px; background: none; } .icon_font { position: absolute; top: 12px; left: 10px; font-size: 18px; color: #3872f6; } .font16 { font-size: 16px; } .mg-t20 { margin-top: 20px; } @media (min-width:200px) {.pd-xs-20 { padding: 20px; }} @media (min-width:768px) {.pd-sm-50 { padding: 50px; }} #grad { background: -webkit-linear-gradient(#4990c1, #52a3d2, #6186a3); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(#4990c1, #52a3d2, #6186a3); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(#4990c1, #52a3d2, #6186a3); /* Firefox 3.6 - 15 */ background: linear-gradient(#4990c1, #52a3d2, #6186a3); /* 标准的语法 */ } /*==jquery.validate css==*/ .field-validation-error { color: #e14430 !important; padding-top: 5px; } .input-validation-error { border-color: #d38e99; } </style> </head> <body> <div class="container wrap1"> <h2 class="mg-b20 text-center">后台管理系统</h2> <div class="col-sm-8 col-md-5 center-auto pd-sm-50 pd-xs-20 main_content"> <p class="text-center font16">用户登陆</p> <form asp-action="Login" method="post" > <div class="form-group mg-t20"> <i class="icon_font glyphicon glyphicon-user"></i> <input type="text" class="login_input" asp-for="UserName" placeholder="请输入用户名" autofocus /> <span asp-validation-for="UserName"></span> </div> <div class="form-group mg-t20"> <i class="icon_font glyphicon glyphicon-lock"></i> <input type="password" class="login_input" asp-for="UserPwd" placeholder="请输入密码" /> <span asp-validation-for="UserPwd"></span> </div> <div class="checkbox mg-b25 hide"> <label> <input type="checkbox">记住个人登陆信息 </label> </div> <button type="submit" class="login_btn">登 录</button> </form> </div> </div> </body> </html>
AccountController
控制器里面至少拥有一个呈现登陆页的action,一个接收登陆请求的action,一个退出的action
·登陆· 判断是否存在用户,将用户名或者用户ID加密后记录到cookie中,跳转到管理页
·退出· 将cookie移出掉,跳转到登陆页
加密的方法可自行切换为其余的加密方法jquery
public class AccountController : Controller { private readonly IUserService _userService; public AccountController(IUserService userService) { _userService = userService; } public IActionResult Login() { return View(); } [HttpPost] [ValidateAntiForgeryToken] public IActionResult Login(AccountModel model) { //验证模型是否正确 if (!ModelState.IsValid) { return View(model); } //调用服务验证用户名密码 if (!_userService.Login(model.UserName, model.UserPwd)) { ModelState.AddModelError(nameof(model.UserPwd), "用户名或密码错误"); return View(); } //加密用户名写入cookie中,AdminAuthorizeAttribute特性标记取出cookie并解码除用户名 var encryptValue = _userService.LoginEncrypt(model.UserName, ApplicationKeys.User_Cookie_Encryption_Key); HttpContext.Response.Cookies.Append(ApplicationKeys.User_Cookie_Key, encryptValue); return Redirect("/"); } public IActionResult Logout() { HttpContext.Response.Cookies.Delete(ApplicationKeys.User_Cookie_Key); return Redirect(WebContext.LoginUrl); } }
本文只是简单的验证是否登陆,关于更复杂的权限验证可参考文章:http://www.cnblogs.com/morang/p/7606843.html,以及示例项目
将此特性标记加到须要的地方便可在访问时验证用户是否登陆,未登陆则跳转到登陆页。git
public class AdminAuthorizeAttribute : Attribute, IAuthorizationFilter { public void OnAuthorization(AuthorizationFilterContext filterContext) { if (string.IsNullOrEmpty(WebContext.AdminName)) { if (filterContext.HttpContext.Request.Headers["X-Requested-With"] == "XMLHttpRequest") { filterContext.Result = new JsonResult("未登陆"); } else { filterContext.Result = new RedirectResult("Account/Login"); } return; } } }
上面特性标记代码中的WebContext.AdminName
是如何取到的呢?还须要结合以下代码web
//服务定位器 public static class ServiceLocator { public static IServiceProvider Instance { get; set; } public static T GetService<T>() where T : class { return Instance.GetService<T>(); } } //一些通用的信息 public static class WebContext { public static string AdminName { get { //获取cookie var hasCookie = ServiceLocator.GetService<IHttpContextAccessor>() .HttpContext .Request.Cookies .TryGetValue(ApplicationKeys.User_Cookie_Key, out string encryptValue); if (!hasCookie || string.IsNullOrEmpty(encryptValue)) return null; var adminName = ServiceLocator.GetService<IUserService>().LoginDecrypt(encryptValue, ApplicationKeys.User_Cookie_Encryption_Key); return adminName; } } public const string LoginUrl = "/account/login"; } //全局的一些Key值 public class ApplicationKeys { public const string User_Cookie_Encryption_Key = "User_Cookie_Encryption_Key"; public const string User_Cookie_Key = "User_Cookie_Key"; } //Startup public void ConfigureServices(IServiceCollection services) { services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();//用于获取请求上下文 services.AddTransient<IUserService, UserService>(); services.AddMvc(); } public void Configure(IApplicationBuilder app, IHostingEnvironment env) { //app.UseMvc().. //最末的时候赋值 ServiceLocator.Instance = app.ApplicationServices; }
ServiceLocator
IApplicationBuilder.ApplicationServices
赋值给ServiceLocator.Instance
,这样就可以在任何地方使用ServiceLocator.Instance
获取到注入的服务T GetService<T>()
方法)ServiceLocator.GetService<IHttpContextAccessor>().HttpContext.Request.Cookies
ServiceLocator.GetService<IUserService>().LoginDecrypt(encryptValue, ApplicationKeys.User_Cookie_Encryption_Key);
WebContext.AdminName
获取到当前登陆用户名,或者根据用户名获取登陆信息IFilterMetadata
,换言之:特性标记实现了IFilterMetadata
就等因而个过滤器(我的理解)asp-for
Startup.ConfigureServices
方法中注入 services.AddTransient<IUserService, UserService>()
asp.net core获取HttpContext
对象 参考:ASP.NET Core开发之HttpContextbootstrap
ASP.NET Core中提供了一个
IHttpContextAccessor
接口,HttpContextAccessor
默认实现了它简化了访问HttpContext
。
它必须在程序启动时在IServicesCollection
中注册,这样在程序中就能获取到HttpContextAccessor
,并用来访问HttpContext
。
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
cookie
form
标签,asp-action
,asp-controller
等指定路由参数便可,而且可以自动生成防伪字段标识,配合ValidateAntiForgeryToken
特性标记预防CSRF
代码生成比较图autofocus
属性 可以使文本框自动获取焦点app
git clone https://git.coding.net/yimocoding/WeDemo.git -b LoginDemo LoginDemo
探索学习中,如有错误或者不足指出还望园友指出。asp.net