asp.net-core - 是否可以更改 UserManager 的生命周期？

Question

我正在尝试更改 UserManager<T>生命周期从 Scoped至 Transient在ConfigureServices(IServiceCollection service)里面但我不知道该怎么做。有可能还是我必须注入(inject) IServiceProvider在每个需要 UserManager<T> 的对象中然后每次我需要使用 UserManager 时创建一个新的范围？

Answer 1

您可以通过以下方式覆盖生命周期范围，或者您可以创建自己的用户管理器:

public void ConfigureServices(IServiceCollection services)
{
  var connectionString = Configuration.GetConnectionString("DefaultConnection");

  services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(connectionString), ServiceLifetime.Transient);

  services.AddDefaultIdentity<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = false)
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>();

  var userManagerServiceDescriptor =
    services.FirstOrDefault(descriptor => descriptor.ServiceType == typeof(UserManager<ApplicationUser>));
  services.Remove(userManagerServiceDescriptor);

  var userStoreServiceDescriptor =
    services.FirstOrDefault(descriptor => descriptor.ServiceType == typeof(IUserStore<ApplicationUser>));
  services.Remove(userStoreServiceDescriptor);

  services.AddTransient<DbContext, ApplicationDbContext>();
  services.AddTransient<IUserStore<ApplicationUser>, UserStore<ApplicationUser>>();
  services.AddTransient<UserManager<ApplicationUser>>();
}