No Registered Service for IEmailSender

[r00terAF23]

Hello all,

I am using ASP.Net Core Web API (.Net Core 8) to create a web app and API, when i added default Identity and Areas Pages i am getting an error for IEmailSender Service not beeing registered even though i dont need and have registered a mock class for it.

Thank you

Program.cs

using Microsoft.AspNetCore.Identity;
using Microsoft.OpenApi.Models;
using Microsoft.EntityFrameworkCore;
using ProMateAPI.Data;
using ProMate.Library;
using Swashbuckle.AspNetCore.Filters;
using ProMateAPI.Utility;
using Microsoft.AspNetCore.Identity.UI.Services;
using Microsoft.Extensions.DependencyInjection;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") ??
                       throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();

// this would be enabled if we only needed the defaults for users and such
//builder.Services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
//    .AddEntityFrameworkStores<ApplicationDbContext>();

// builder.Services.AddDbContext<TContext>(options => options.UseSqlServer(builder.Configuration.GetConnectionString("Default")));
builder.Services.AddDbContext<ProMateContext>();

builder.Services.AddControllersWithViews();
builder.Services.AddRazorPages();

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(options =>
{
    options.AddSecurityDefinition("oauth2", new OpenApiSecurityScheme
    {
        In = ParameterLocation.Header,
        Name = "Authorization",
        Type = SecuritySchemeType.ApiKey,
    });

    options.OperationFilter<SecurityRequirementsOperationFilter>();
});

/*
 * options =>
    {
        options.SignIn.RequireConfirmedAccount = false;
        options.SignIn.RequireConfirmedAccount = false;
    }
 *
 *
 */
builder.Services.AddScoped<IEmailSender, MyEmailSender>();
builder.Services.AddIdentity<IdentityUser, IdentityRole>().AddEntityFrameworkStores<ApplicationDbContext>();
////builder.Services.AddIdentityApiEndpoints<IdentityUser>().AddEntityFrameworkStores<ApplicationDbContext>();
builder.Services.AddAuthentication();
builder.Services.AddAuthorization();


var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
    app.UseMigrationsEndPoint();
}
else
{
    app.UseExceptionHandler("/Home/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.MapIdentityApi<IdentityUser>();

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

app.MapRazorPages();

app.Run();

-------------
MyEmailSender.cs

using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI.Services;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Mail;
using System.Text;
using System.Threading.Tasks;

namespace ProMateAPI.Utility;

public class MyEmailSender : IEmailSender
{
    public Task SendEmailAsync(string email, string subject, string htmlMessage)
    {
        return Task.CompletedTask;
    }
}


-----------------
Register.html.cs

// 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 System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Text.Encodings.Web;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI.Services;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.WebUtilities;
using Microsoft.Extensions.Logging;
using ProMateAPI.Utility;

namespace ProMateAPI.Areas.Identity.Pages.Account
{
    public class RegisterModel : PageModel
    {
        private readonly SignInManager<IdentityUser> _signInManager;
        private readonly UserManager<IdentityUser> _userManager;
        private readonly RoleManager<IdentityRole> _roleManager;
        private readonly IUserStore<IdentityUser> _userStore;
        private readonly IUserEmailStore<IdentityUser> _emailStore;
        private readonly ILogger<RegisterModel> _logger;
        //private readonly IEmailSender _emailSender;

        // IEmailSender emailSender
        public RegisterModel(
            UserManager<IdentityUser> userManager,
            RoleManager<IdentityRole> roleManager,
            IUserStore<IdentityUser> userStore,
            SignInManager<IdentityUser> signInManager,
            ILogger<RegisterModel> logger
        )
        {
            _userManager = userManager;
            _roleManager = roleManager;
            _userStore = userStore;
            _emailStore = GetEmailStore();
            _signInManager = signInManager;
            _logger = logger;
            //_emailSender = emailSender;
        }

        /// <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 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>
        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 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]
            [EmailAddress]
            [Display(Name = "Email")]
            public string Email { 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]
            [StringLength(100, ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.",
                MinimumLength = 6)]
            [DataType(DataType.Password)]
            [Display(Name = "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>
            [DataType(DataType.Password)]
            [Display(Name = "Confirm password")]
            [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
            public string ConfirmPassword { get; set; }
        }


        public async Task OnGetAsync(string returnUrl = null)
        {
            // creates missing roles
            if (!_roleManager.RoleExistsAsync(SD.Roles.Customer.ToString()).GetAwaiter().GetResult())
            {
                foreach (var r in Enum.GetValues(typeof(SD.Roles)))
                {
                    _roleManager.CreateAsync(new IdentityRole(r.ToString())).GetAwaiter().GetResult();
                }
            }

            ReturnUrl = returnUrl;
            ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();
        }

        public async Task<IActionResult> OnPostAsync(string returnUrl = null)
        {
            returnUrl ??= Url.Content("~/");
            ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();
            if (ModelState.IsValid)
            {
                var user = CreateUser();

                await _userStore.SetUserNameAsync(user, Input.Email, CancellationToken.None);
                await _emailStore.SetEmailAsync(user, Input.Email, CancellationToken.None);
                var result = await _userManager.CreateAsync(user, Input.Password);

                if (result.Succeeded)
                {
                    _logger.LogInformation("User created a new account with password.");

                    var userId = await _userManager.GetUserIdAsync(user);
                    var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
                    code = WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(code));
                    var callbackUrl = Url.Page(
                        "/Account/ConfirmEmail",
                        pageHandler: null,
                        values: new { area = "Identity", userId = userId, code = code, returnUrl = returnUrl },
                        protocol: Request.Scheme);

                    //await _emailSender.SendEmailAsync(Input.Email, "Confirm your email",
                    //    $"Please confirm your account by <a href='{HtmlEncoder.Default.Encode(callbackUrl)}'>clicking here</a>.");

                    if (_userManager.Options.SignIn.RequireConfirmedAccount)
                    {
                        return RedirectToPage("RegisterConfirmation",
                            new { email = Input.Email, returnUrl = returnUrl });
                    }
                    else
                    {
                        await _signInManager.SignInAsync(user, isPersistent: false);
                        return LocalRedirect(returnUrl);
                    }
                }

                foreach (var error in result.Errors)
                {
                    ModelState.AddModelError(string.Empty, error.Description);
                }
            }

            // If we got this far, something failed, redisplay form
            return Page();
        }

        private IdentityUser CreateUser()
        {
            try
            {
                return Activator.CreateInstance<IdentityUser>();
            }
            catch
            {
                throw new InvalidOperationException($"Can't create an instance of '{nameof(IdentityUser)}'. " +
                                                    $"Ensure that '{nameof(IdentityUser)}' is not an abstract class and has a parameterless constructor, or alternatively " +
                                                    $"override the register page in /Areas/Identity/Pages/Account/Register.cshtml");
            }
        }

        private IUserEmailStore<IdentityUser> GetEmailStore()
        {
            if (!_userManager.SupportsUserEmail)
            {
                throw new NotSupportedException("The default UI requires a user store with email support.");
            }

            return (IUserEmailStore<IdentityUser>)_userStore;
        }
    }
}

[#2]

I'm using net core 8.0, and for this issue I had to install Microsoft.AspNetCore.Identity.UI  package and add .AddDefaultUI(); 

to my builder.Services.AddIdentity<AppUser, IdentityRole>

// Identity
builder.Services.AddIdentity<AppUser, IdentityRole>(options =>
{
options.User.RequireUniqueEmail = true;
options.Password.RequireDigit = true;
options.Password.RequireLowercase = true;
options.Password.RequireUppercase = true;
options.Password.RequireNonAlphanumeric = true;
options.Password.RequiredLength = 12;
options.SignIn.RequireConfirmedEmail = false;
})
.AddEntityFrameworkStores<ApplicationDBContext>()
.AddDefaultUI();

also I have app.MapIdentityApi<AppUser>(); to map all auth enpoints.
and this fixed my issue.