Razor 页面中的登录问题

Question

我在登录时遇到问题。在此之前，我创建了一个注册页面，它工作正常，它将用户插入数据库。我一直使用身份登录。

当我尝试登录时，我输入了正确的用户名和密码，但由于某种原因，它不起作用。我还在

OnPostAsync

方法中调试并放置了断点，可以看到它进入了显示

ModelState.AddModelError(string.Empty, "Invalid login attempt.")

的 else 分支，但它没有像以前那样在 UI 上显示它。这是我的代码。

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
#nullable disable

using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.ComponentModel.DataAnnotations;

namespace Biblioteka.Areas.Identity.Pages.Account
{
    public class LoginModel : PageModel
    {
        private readonly SignInManager<IdentityUser> _signInManager;
        private readonly ILogger<LoginModel> _logger;

        public LoginModel(SignInManager<IdentityUser> signInManager, ILogger<LoginModel> logger)
        {
            _signInManager = signInManager;
            _logger = logger;
        }
        [TempData]
        public string SuccessMessage { get; set; }
        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        [BindProperty]
        public InputModel Input { get; set; }

        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        public IList<AuthenticationScheme> ExternalLogins { get; set; }

        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        public string ReturnUrl { get; set; }

        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        [TempData]
        public string ErrorMessage { get; set; }

        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        public class InputModel
        {
            /// <summary>
            ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
            ///     directly from your code. This API may change or be removed in future releases.
            /// </summary>
            [Required]
            [Display(Name = "Username")]
            public string UserName { get; set; }

            /// <summary>
            ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
            ///     directly from your code. This API may change or be removed in future releases.
            /// </summary>
            [Required]
            [DataType(DataType.Password)]
            public string Password { get; set; }

            /// <summary>
            ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
            ///     directly from your code. This API may change or be removed in future releases.
            /// </summary>
            [Display(Name = "Remember me?")]
            public bool RememberMe { get; set; }
        }

        public async Task OnGetAsync(string returnUrl = null)
        {
            if (!string.IsNullOrEmpty(ErrorMessage))
            {
                ModelState.AddModelError(string.Empty, ErrorMessage);
            }

            returnUrl ??= Url.Content("~/");

            await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);

            ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();

            ReturnUrl = returnUrl;
        }

        public async Task<IActionResult> OnPostAsync(string returnUrl = null)
        {
            returnUrl ??= Url.Content("~/");

            ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();

            if (ModelState.IsValid)
            {
                var result = await _signInManager.PasswordSignInAsync(Input.UserName, Input.Password, Input.RememberMe, lockoutOnFailure: false);

                if (result.Succeeded)
                {
                    _logger.LogInformation("User logged in.");
                    returnUrl = "../../../Pages/Pocetna";
                    return LocalRedirect(returnUrl);
                }
                else
                {
                    if (result.RequiresTwoFactor)
                    {
                        return RedirectToPage("./LoginWith2fa", new { ReturnUrl = returnUrl, RememberMe = Input.RememberMe });
                    }
                    if (result.IsLockedOut)
                    {
                        _logger.LogWarning("User account locked out.");
                        ModelState.AddModelError(string.Empty, "Account is locked out. Please try again later.");
                        return Page();
                    }
                    else
                    {
                        ModelState.AddModelError(string.Empty, "Invalid login attempt.");
                        return Page();
                    }
                }
            }
            return Page();
        }
    }
}

Answer 1

确保您有此行：

<div asp-validation-summary="ModelOnly" class="text-danger"></div> 

将上面的行以如下形式放置：

<form id="account" method="post">
    <h2>Use a local account to log in.</h2>
    <hr />
     <div asp-validation-summary="ModelOnly" class="text-danger"></div> 
    <div class="form-floating">
        <input type="hidden" asp-for="ReturnUrl" />
        <input asp-for="Input.Email" class="form-control" autocomplete="username" aria-required="true" />
        <label asp-for="Input.Email" class="form-label"></label>
        <span asp-validation-for="Input.Email" class="text-danger"></span>
    </div>
     ...

然后将显示“无效的登录尝试”。

此外，请记得检查您的电子邮件以确认您的帐户。 您可以在注册确认页面点击“点击这里确认您的账户”

或 将

EmailConfirmed

列设置为 true 以确认您的帐户。