Question

我有一个启用了Identity的asp.net core 2.1项目，但是对种子用户进行了某些更改之后，我遇到了一些问题。

单击注册为新用户时出现的错误是

InvalidOperationException：尝试激活“名称空间.Website.Main.Areas.Identity.Pages.Account.RegisterModel”时，无法解析类型为“ Microsoft.AspNetCore.Identity.UI.Services.IEmailSender”的服务。

在Register.cshtml.cs类中，我看到注入了IEmailSender，但对此没有做任何更改，并且无法理解为什么会发生此错误？请帮助

Startup.cs

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.Configure<CookiePolicyOptions>(options =>
        {
            // This lambda determines whether user consent for non-essential cookies is needed for a given request.
            options.CheckConsentNeeded = context => true;
            options.MinimumSameSitePolicy = SameSiteMode.None;
        });
        services.AddIdentity<IdentityUser, IdentityRole>()
            .AddEntityFrameworkStores<ApplicationDbContext>();
        services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlServer(
                Configuration.GetConnectionString("DefaultConnection")));
        services.AddHttpClient();

        services.AddHttpClient<IExceptionServiceClient, ExceptionServiceClient>();
        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
    }
}

RolesConfig

public static class RolesConfig
{
    public static async Task InitialiseAsync(ApplicationDbContext context, IServiceProvider serviceProvider)
    {
        var roleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
        string[] roleNames = { "Admin", "Report", "Search" };
        foreach (var roleName in roleNames)
        {
            var roleExist = await roleManager.RoleExistsAsync(roleName);
            if (!roleExist)
                await roleManager.CreateAsync(new IdentityRole(roleName));
        }
    }
}

Register.cshtml.cs

public class RegisterModel : PageModel
{
    private readonly SignInManager<IdentityUser> _signInManager;
    private readonly UserManager<IdentityUser> _userManager;
    private readonly ILogger<RegisterModel> _logger;
    private readonly IEmailSender _emailSender;

    public RegisterModel(
        UserManager<IdentityUser> userManager,
        SignInManager<IdentityUser> signInManager,
        ILogger<RegisterModel> logger,
        IEmailSender emailSender)
    {
        _userManager = userManager;
        _signInManager = signInManager;
        _logger = logger;
        _emailSender = emailSender;
    }

    [BindProperty]
    public InputModel Input { get; set; }

    public string ReturnUrl { get; set; }

    public class InputModel
    {
        [Required]
        [EmailAddress]
        [Display(Name = "Email")]
        public string Email { get; set; }

        [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; }

        [DataType(DataType.Password)]
        [Display(Name = "Confirm password")]
        [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
        public string ConfirmPassword { get; set; }
    }

    public void OnGet(string returnUrl = null)
    {
        ReturnUrl = returnUrl;
    }

    public async Task<IActionResult> OnPostAsync(string returnUrl = null)
    {
        returnUrl = returnUrl ?? Url.Content("~/");
        if (ModelState.IsValid)
        {
            var user = new IdentityUser { UserName = Input.Email, Email = Input.Email };
            var result = await _userManager.CreateAsync(user, Input.Password);
            if (result.Succeeded)
            {
                _logger.LogInformation("User created a new account with password.");

                var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
                var callbackUrl = Url.Page(
                    "/Account/ConfirmEmail",
                    pageHandler: null,
                    values: new { userId = user.Id, code = code },
                    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>.");

                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();
    }
}

非常感谢您的帮助！谢谢

Answer 1

问题是您正在IEmailSender中使用RegisterModel进行彻底的构造函数依赖注入，但是没有将IEmailSender注册到ASP.NET Core DI容器中。因此，要注册IEmailSender，请将以下行添加到ConfigureServices类的Startup方法中：

services.AddScoped<IEmailSender,EmailSender>();

现在问题应该消失了。

尝试激活yyy

Startup.cs

RolesConfig

Register.cshtml.cs

1 个答案: