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asp.net core 2最简单的登录功能
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
我要评论 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 cookies is needed for a given request.
options.checkconsentneeded = context => true;
options.minimumsamesitepolicy = samesitemode.none;
});
//sqlserve
services.adddbcontext<mydbcontext>(x => x.usesqlserver(configuration.getconnectionstring("defaultconnection")));
//添加cookie认证服务
services.addauthentication(cookieauthenticationdefaults.authenticationscheme)
.addcookie(options =>
{
options.loginpath = "/home/index/";
});
services.addmvc().setcompatibilityversion(compatibilityversion.version_2_2);
}
// this method gets called by the runtime. use this method to configure the http request pipeline.
public void configure(iapplicationbuilder app, ihostingenvironment env)
{
if (env.isdevelopment())
{
app.usedeveloperexceptionpage();
}
else
{
app.useexceptionhandler("/home/error");
}
//使用认证服务
app.useauthentication();
app.usestaticfiles();
app.usecookiepolicy();
app.usemvc(routes =>
{
routes.maproute(
name: "default",
template: "{controller=home}/{action=index}/{id?}");
});
}
修改views/home/index.cshtml为下面内容
@model cookieauth.models.user
@{
viewdata["title"] = "home page";
}
<div class="row">
<div class="col-md-4">
<section>
<form method="post" asp-action="login">
<h4>login</h4>
<hr />
<div class="form-group">
<label asp-for="username"></label>
<input asp-for="username" class="form-control" />
</div>
<div class="form-group">
<label asp-for="userpwd"></label>
<input asp-for="userpwd" type="password" class="form-control" />
</div>
<div class="form-group">
<button type="submit" class="btn btn-default">登录</button>
</div>
</form>
</section>
</div>
</div>
在_layout中添加一个导航栏
然后在test控制器中添加认证特性
就可以启动项目。
如果不没输入正确的地址是会被重定向到登录页面。
就这样先，如果是已有项目 只需要在startup中添加cookie认证服务以及在login和logout方法中创建和销毁声明。
在controller或者action中添加启动认证或者不启用认证随意配置
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