我使用 Identity 创建了一个示例 Web 应用程序来管理身份验证。
但目前我在 _Layout.cshtml 中面临一个问题，SignInManager.IsSignedIn(User) 始终为 false（即使用户登录成功）：
这是_Layout.cshtml文件
@using Microsoft.AspNetCore.Identity
@inject SignInManager<IdentityUser> SignInManager
@inject UserManager<IdentityUser> UserManager
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>@ViewData["Title"] - SampleWebApplication</title>
<link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
<link rel="stylesheet" href="~/css/site.css" asp-append-version="true" />
<link rel="stylesheet" href="~/SampleWebApplication.styles.css" asp-append-version="true" />
</head>
<body>
<header>
<nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
<div class="container">
<a class="navbar-brand" asp-area="" asp-page="/Index">Sample Web Application</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
@if (SignInManager.IsSignedIn(User))
{
<ul class="navbar-nav flex-grow-1">
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-page="/Index">Home</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-page="/Privacy">Privacy</a>
</li>
</ul>
<ul class="navbar-nav d-flex justify-content-end">
<li class="nav-item">
<a class="btn btn-primary" asp-area="" asp-page="/Logout">Logout</a>
</li>
</ul>
}
else
{
<ul class="navbar-nav d-flex justify-content-end flex-grow-1 ">
<li class="nav-item">
<a asp-page="/Login" class="btn btn-primary">Login</a>
</li>
<li class="nav-item">
<a asp-page="/Register" class="btn">Register</a>
</li>
</ul>
}
</div>
</div>
</nav>
</header>
<div class="container">
<main role="main" class="pb-3">
@RenderBody()
</main>
</div>
<footer class="border-top footer text-muted">
<div class="container">
© 2024 - SampleWebApplication - <a asp-area="" asp-page="/Privacy">Privacy</a>
</div>
</footer>
<script src="~/lib/jquery/dist/jquery.min.js"></script>
<script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
<script src="~/js/site.js" asp-append-version="true"></script>
@await RenderSectionAsync("Scripts", required: false)
</body>
</html>
这是Program.cs文件
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.SqlServer;
using SampleWebApplication.Model;
var builder = WebApplication.CreateBuilder(args);
var connectionString = builder.Configuration.GetConnectionString("AuthConnectionString") ?? throw new InvalidOperationException();
// Add services to the container.
builder.Services.AddRazorPages();
builder.Services.AddControllersWithViews();
builder.Services.AddIdentity<IdentityUser, IdentityRole>().AddEntityFrameworkStores<AuthDbContext>();
builder.Services.AddDbContext<AuthDbContext>(options => options.UseSqlServer(builder.Configuration.GetConnectionString("AuthConnectionString")));
var app = builder.Build();
// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
app.UseExceptionHandler("/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.MapRazorPages();
app.Run();
app.UseAuthentication();
有人可以建议我哪里出错了吗？另外我希望 SignInManager.IsSignedIn(User) 在成功登录后返回 true。
Startup.cs 文件中的中间件组件需要按照正确的顺序进行配置，以在授权之前处理身份验证。
在您的 Program.cs 中，
app.UseAuthorization();
之前已注册：
app.UseAuthentication();
这是不正确的。必须在调用授权中间件之前调用身份验证中间件。确保在执行任何授权检查之前建立用户身份并与请求关联，就像您在 _Layout.cshtml 中使用的情况一样。