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

Question

我想为我的 SignInManager 创建一个自定义类，所以我创建了一个继承自 SignInManager<> 的类如下:

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));
    }
}

然后我将它添加到 Startup.cs 的服务配置中:

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

问题是默认的SignInManager<ApplicationUser>无法转换为 ApplicationSignInManager ，因此在访问管理器被注入(inject)其 Controller 的页面时出现此错误:

InvalidCastException: Unable to cast object of type 'Microsoft.AspNetCore.Identity.SignInManager`1[Socialize.Data.ApplicationUser]' to type 'Socialize.Utilities.Identity.ApplicationSignInManager'.

Answer 1

您的问题是由您注册 AddSignInManager<ApplicationSignInManager>() 引起的之前.AddDefaultUI(UIFramework.Bootstrap4) .

对于 AddDefaultUI , 它会调用 builder.AddSignInManager();这将注册 typeof(SignInManager<>).MakeGenericType(builder.UserType)并将覆盖您之前的设置。

尝试下面的代码:

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