ASP.NET Core Identity does not inject UserManager

Question

I\'ve got an older asp.net core identity database, and I want to map a new project (a web api) to it.

Just for the test, I copied the Models folder, and the Applicat

Answer 1

Do you have the app.UseIdentity(); call in the Configure method:

 public void Configure(IApplicationBuilder app, 
                       IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        /*...*/
        app.UseIdentity();
       /*...*/          
    }

EDIT Do you also have this line before the services.AddIdentity<ApplicationUser, IdentityRole>() line?

 public void ConfigureServices(IServiceCollection services)
 {
        // Add framework services.
        services.AddDbContext<ApplicationDbContext>(options =>
             options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

 }

This should work OK. Also please check if ApplicationDbContext inherits from IdentityDbContext.

Answer 2

DI container is unable to resolve a dependency. Add it to the services collection

services.AddTransient<UserManager<ApplicationUser>>();
services.AddTransient<ApplicationDbContext>();

You should also familiarize yourself with the official documentation

Answer 3

public void ConfigureServices(IServiceCollection services){
...
var identityBuilder = services.AddIdentityCore<ApplicationUser>(user =>
            {
                // configure identity options
                user.Password.RequireDigit = true;
                user.Password.RequireLowercase = false;
                user.Password.RequireUppercase = false;
                user.Password.RequireNonAlphanumeric = false;
                user.Password.RequiredLength = 6;
            });
            identityBuilder = new IdentityBuilder(identityBuilder.UserType, typeof(IdentityRole), identityBuilder.Services);
            identityBuilder.AddEntityFrameworkStores<DbContext>().AddDefaultTokenProviders();
    ...
}