Unable to resolve service for type 'Microsoft.AspNetCore.Identity.SignInManager` while attempting to activate 'xxxxx.LoginModel'

user_1162409 0
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I have scaffolded the Identity using the CLI as

dotnet add package Microsoft.VisualStudio.Web.CodeGeneration.Design
dotnet add package Microsoft.EntityFrameworkCore.Design

Then I list all the files

dotnet aspnet-codegenerator identity --listFiles

I used the login dotnet aspnet-codegenerator identity --files="Account.Login" Now I can see in the Area section the login.cshtml file is generated

enter image description here

Now when I navigate to https://localhost:5001/Identity/Account/Login?ReturnUrl=%2Fconnect%2Fauthorize%2Fcallback%3Fclient_id%3DVotingApplication%26redirect_uri%3Dhttps%253A%252F%252Flocalhost%253A5001%252Fauthentication%252Flogin-callback%26response_type%3Dcode%26scope%3DVotingApplicationAPI%2520openid%2520profile%26state%3Daceb10c45488493b9a675c830327ecbf%26code_challenge%3DnU-0BBK2wjgOSEDdB4Qjy5T8f3qHWTlgu0UmMgVDEAU%26code_challenge_method%3DS256%26response_mode%3Dquery

I get an exception as

InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Identity.SignInManager`1[Microsoft.AspNetCore.Identity.IdentityUser]' while attempting to activate 'VotingApplication.Areas.Identity.Pages.Account.LoginModel'.

In the startup.cs I have the below configuration

services.AddIdentityServer()
                .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
                .AddProfileService<ProfileService>();

Since I am using the ApplicationUser, I am not able to see the account controller when I do the scaffolder.

public class IdentityHostingStartup : IHostingStartup
{
    public void Configure(IWebHostBuilder builder)
    {
        builder.ConfigureServices((context, services) => {
            services.AddDefaultIdentity<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = true)
                .AddEntityFrameworkStores<ApplicationDbContext>();
        });
    }
}

Since the scaffolder is using IdentityUser, how can I make this to work with ApplicationUser

_LoginPartial.cshtml

@using Microsoft.AspNetCore.Identity
@using global::Data
@using global::Data.Domain
@inject SignInManager<ApplicationUser> SignInManager
@inject UserManager<ApplicationUser> UserManager

@{
    string returnUrl = null;
    var query = ViewContext.HttpContext.Request.Query;
    if (query.ContainsKey("returnUrl"))
    {
        returnUrl = query["returnUrl"];
    }
}

<ul class="navbar-nav">
    @if (SignInManager.IsSignedIn(User))
    {
        <li class="nav-item">
            <a class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity.Name!</a>
        </li>
        <li class="nav-item">
            <form class="form-inline" asp-area="Identity" asp-page="/Account/Logout" asp-route-returnUrl="/">
                <button type="submit" class="nav-link btn btn-link text-dark">Logout</button>
            </form>
        </li>
    }
    else
    {
        <li class="nav-item">
            <a class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Register" asp-route-returnUrl="@returnUrl">Register</a>
        </li>
        <li class="nav-item">
            <a class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Login" asp-route-returnUrl="@returnUrl">Login</a>
        </li>
    }
</ul>
identityserver4 asp.net-identity asp.net-core asp.net c#
2 Answers

InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Identity.SignInManager`1[Microsoft.AspNetCore.Identity.IdentityUser]' while attempting to activate 'VotingApplication.Areas.Identity.Pages.Account.LoginModel'.

It seems that you update the IdentityUser derived class with custom properties and name it as ApplicationUser.

And based on your description and code, we can find that you just replaced IdentityUser with ApplicationUser in ConfigureServices method and _LoginPartial.cshtml file, you seems not update Login.cshtml.cs file to replace IdentityUser with ApplicationUser, which cause the issue.

Please make sure you inject the instance of UserManager and SignInManager within LoginModel class using UserManager<ApplicationUser> and SignInManager<ApplicationUser>, like below.

[AllowAnonymous]
public class LoginModel : PageModel
{
    private readonly UserManager<ApplicationUser> _userManager;
    private readonly SignInManager<ApplicationUser> _signInManager;
    private readonly ILogger<LoginModel> _logger;

    public LoginModel(SignInManager<ApplicationUser> signInManager, 
        ILogger<LoginModel> logger,
        UserManager<ApplicationUser> userManager)
    {
        _userManager = userManager;
        _signInManager = signInManager;
        _logger = logger;
    }
user_67516340

You have a class that dependents on ApplicationSignInManager. You need to register ApplicationSignInManager

services.AddIdentity<User, Role>(identityOptions =>
        {
            // identityOptions.SignIn.RequireConfirmedPhoneNumber = true;
            // identityOptions.SignIn.RequireConfirmedEmail = true;
        })
        .AddUserManager<ApplicationUserManager>()      // <- use only if use have custom implementation
        .AddSignInManager<ApplicationSignInManager>(); // <- use only if use have custom implementation

you can find sample implementation here

user_17351960
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