userManager。创建异步系统。ObjectDisposedException未处理

我们正在尝试在ASP中使用Microsoft帐户身份验证。Net 5项目。我们不需要本地身份验证,也不需要用户名。

在ASP。Net 5 web应用程序模板,在与外部提供程序登录后,控件返回到 ExternalLoginCallback 在AccountController中。

如果用户未在本地注册 外部登录回拨 将用户返回到注册屏幕。我试图修改 外部登录回拨 以如下自动注册新用户。

        public async Task<IActionResult> ExternalLoginCallback(string returnUrl = null)
    {
        var info = await _signInManager.GetExternalLoginInfoAsync();
        if (info == null)
        {
            return RedirectToAction(nameof(Login));
        }

        // Sign in the user with this external login provider if the user already has a login.
        var result = await _signInManager.ExternalLoginSignInAsync(info.LoginProvider, info.ProviderKey, isPersistent: false);
        if (result.Succeeded)
        {
            _logger.LogInformation(5, "User logged in with {Name} provider.", info.LoginProvider);
            return RedirectToLocal(returnUrl);
        }
        if (result.RequiresTwoFactor)
        {
            return RedirectToAction(nameof(SendCode), new { ReturnUrl = returnUrl });
        }
        if (result.IsLockedOut)
        {
            return View("Lockout");
        }
        else
        {
            // If the user does not have an account, then ask the user to create an account.
            //ViewData["ReturnUrl"] = returnUrl;
            //ViewData["LoginProvider"] = info.LoginProvider;
            //var email = info.ExternalPrincipal.FindFirstValue(ClaimTypes.Email);
            //return View("ExternalLoginConfirmation", new ExternalLoginConfirmationViewModel { Email = email });

            // The user has not previously logged in with an external provider. Create a new user.
            CreateUser(info);
            return RedirectToLocal(returnUrl);
        }
    }

CreateUser实现从复制的代码 ExternalLoginConfirmation 正如它在ASP。网络应用程序的Net 5模板。

        private async void CreateUser(ExternalLoginInfo info)
    {
        var email = info.ExternalPrincipal.FindFirstValue(ClaimTypes.Email);
        var user = new ApplicationUser { UserName = email, Email = email };
        var result = await _userManager.CreateAsync(user);
        if (result.Succeeded)
        {
            result = await _userManager.AddLoginAsync(user, info);
            if (result.Succeeded)
            {
                await _signInManager.SignInAsync(user, isPersistent: false);
                _logger.LogInformation(6, "User created an account using {Name} provider.", info.LoginProvider);
            }
        }
        AddErrors(result);
    }

在线上抛出错误

var result = await _userManager.CreateAsync(user);

错误是

System.ObjectDisposedException was unhandled Message: An unhandled exception of type 'System.ObjectDisposedException' occurred in mscorlib.dll. Additional information: Cannot access a disposed object.

我重新启动了我的机器,以防它“只是其中之一”,但错误再次出现。