SignInManager.IsSignedInUser方法始终返回false

如何解决SignInManager.IsSignedInUser方法始终返回false

如果使用-app.useAuthentication（）中间件，则if条件始终返回false

_Layout.cshtml

                @if (signInManager.IsSignedIn(User))
                {
                    <li class="nav-item">
                        <form method="post" asp-controller="account" asp-action="logout">
                            <button type="submit" style="width:auto"
                                    class="nav-link btn btn-link py-0">
                                Logout @User.Identity.Name
                            </button>
                        </form>
                    </li>
                }
                else
                {
                    <li class="nav-item">
                        <a class="nav-link" asp-controller="account" asp-action="register">
                            Register
                        </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" asp-controller="account" asp-action="login">
                            Login
                        </a>
                    </li>
                }

Satrtup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using EmployeeManagementPractice.Modals;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace EmployeeManagementPractice
{
    public class Startup
    {
        private IConfiguration _config;

        public Startup(IConfiguration config)
        {
            _config = config;
        }
        
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddAuthentication();

        services.AddIdentity<IdentityUser,IdentityRole>(options =>
        {
            options.Password.RequiredLength = 8;
        }).AddEntityFrameworkStores<AppDbContext>();


        services.AddDbContextPool<AppDbContext>(
            options => options.UseSqlServer(_config.GetConnectionString("EmployeeDBConnection")));

        services.AddMvc(action => action.EnableEndpointRouting = false);

        services.AddScoped<IEmployeeRepository,SQLEmployeeRepository>();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app,IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/Error");
            app.UseStatusCodePagesWithReExecute("/Error/{0}");
        }

        app.UseStaticFiles();
        app.UseMvc(routes =>
        {
            routes.MapRoute("default","{controller=home}/{action=index}/{id?}");
        });
        app.UseRouting();
        app.UseAuthentication();
        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapGet("/",async context =>
            {
                await context.Response.WriteAsync("Hello World!");
            });
        });
        }
    }
}

每当我在调试模式下运行mvc文件时，即使在正确的登录ID和密码之后，signInManager.IsSignedIn（User）也会返回false

在控制器中，在“登录操作”中-如果（结果成功）返回true，请帮助某人，为什么signInManager.IsSignedIn（User）返回false。

public async Task<IActionResult> Login(LoginViewModel model)
    {
        if (ModelState.IsValid)
        {
            var result = await signInManager.PasswordSignInAsync(model.Email,model.Password,model.RememberMe,false);
            if (result.Succeeded)
            {
                return RedirectToAction("index","home");
            }
            ModelState.AddModelError("","Invalid Login Password");
        }
        return View();
    }

解决方法

检查DbContext和AddIdentity的顺序。如果您没有使用任何JWT令牌，我认为您不需要services.AddAuthentication();的配置，因此我已将其删除。并查看下面的代码，您已经丢失了几件事。

public void ConfigureServices(IServiceCollection services)
{
    //Add this two configuration
    services.AddControllersWithViews();
    services.AddRazorPages();
    ///////////////////

    services.AddDbContextPool<AppDbContext>(
        options => options.UseSqlServer(_config.GetConnectionString("EmployeeDBConnection")));

    services.AddIdentity<IdentityUser,IdentityRole>(options =>
    {
        options.Password.RequiredLength = 6;
    }).AddEntityFrameworkStores<AppDbContext>()        
    .AddDefaultTokenProviders();

    services.AddMvc(action => action.EnableEndpointRouting = false);

    services.AddScoped<IEmployeeRepository,SQLEmployeeRepository>();
}

然后在Configure中更改以下内容：

// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app,IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseExceptionHandler("/Error");
        app.UseStatusCodePagesWithReExecute("/Error/{0}");
    }

    //and this thing are also needed
    app.UseHttpsRedirection();
    app.UseStaticFiles();

    app.UseRouting();

    app.UseAuthentication();
    app.UseAuthorization();

    //you have not given the path to redirect after login,so u need to add this.
    app.UseEndpoints(endpoints =>
    {
            endpoints.MapControllerRoute(
                name: "default",pattern: "{controller=Home}/{action=Index}/{id?}");
            endpoints.MapRazorPages();
    });
}

如果您使用过_Layout.cshtml，请检查：

@using Microsoft.AspNetCore.Identity
@inject SignInManager<IdentityUser> SignInManager
@inject UserManager<IdentityUser> UserManager

似乎您在此处使用的所有配置都是基于dotnet core 2.2。 asp.net core 3.1有所不同。

有关更多信息，请访问链接：

https://docs.microsoft.com/en-us/aspnet/core/security/authentication/identity?view=aspnetcore-3.1&tabs=visual-studio