在Asp.Net Core 3 Identity中创建自定义SignInManager

问题描述

我想为SignInManager创建一个自定义类，因此我创建了一个从SignInManager<>继承的类，如下所示:

I want to create a custom class for my SignInManager, so I've created a class that inherts from SignInManager<> as follows:

public class ApplicationSignInManager : SignInManager<ApplicationUser>
{
    private readonly UserManager<ApplicationUser> _userManager;
    private readonly ApplicationDbContext _dbContext;
    private readonly IHttpContextAccessor _contextAccessor;

    public ApplicationSignInManager(
UserManager<ApplicationUser> userManager,
        IHttpContextAccessor contextAccessor,
        IUserClaimsPrincipalFactory<ApplicationUser> claimsFactory,
        IOptions<IdentityOptions> optionsAccessor,
        ILogger<SignInManager<ApplicationUser>> logger,
        ApplicationDbContext dbContext,
        IAuthenticationSchemeProvider schemeProvider
        )
        : base(userManager, contextAccessor, claimsFactory, optionsAccessor, logger, schemeProvider)
    {
        _userManager = userManager ?? throw new ArgumentNullException(nameof(userManager));
        _contextAccessor = contextAccessor ?? throw new ArgumentNullException(nameof(contextAccessor));
        _dbContext = dbContext ?? throw new ArgumentNullException(nameof(dbContext));
    }
}

，然后将其添加到Startup.cs的服务配置中:

and then I've added it in the services configuration in Startup.cs:

services.AddDefaultIdentity<ApplicationUser>(configure =>
{
    configure.User.AllowedUserNameCharacters += " ";
}).AddSignInManager<ApplicationSignInManager>()
  .AddDefaultUI(UIFramework.Bootstrap4)
  .AddEntityFrameworkStores<ApplicationDbContext>();

问题在于默认的SignInManager<ApplicationUser>无法强制转换为ApplicationSignInManager，因此当访问其管理器已注入其控制器的页面时，出现此错误:

The problem is that the default SignInManager<ApplicationUser> cannot be casted to a ApplicationSignInManager, so I get this error when accessing a page in whose controller the manager is injected:

推荐答案

您的问题是由在.AddDefaultUI(UIFramework.Bootstrap4)之前注册AddSignInManager<ApplicationSignInManager>()引起的.

Your issue is caused by that you register AddSignInManager<ApplicationSignInManager>() before .AddDefaultUI(UIFramework.Bootstrap4).

对于 AddDefaultUI ，它将调用 builder.AddSignInManager(); 将会注册typeof(SignInManager<>).MakeGenericType(builder.UserType)，它将覆盖您之前的设置.

For AddDefaultUI, it will call builder.AddSignInManager(); which will register the typeof(SignInManager<>).MakeGenericType(builder.UserType) and will override your previous settings.

尝试下面的代码:

        services.AddDefaultIdentity<ApplicationUser>()                
            .AddDefaultUI(UIFramework.Bootstrap4)
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddSignInManager<ApplicationSignInManager>();

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