Seeding Roles with RoleManager in Asp.Net Core 2

Question

I have been seeding my database by using this link

Seeding Db with AspNet Core

Now when seeding I also would like to access UserManager<ApplicationUser> and RoleManager<IdentityRole> .

However, as this is called in the configure method I cannot find the service using;

var RoleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();

var UserManager = serviceProvider.GetRequiredService<UserManager<ApplicationUser>>();

How would I access this inject this in so I can seed my roles etc?

Answer 1

Just to give you a tip, I use this in our Startup.cs. I hope this might help you.

// Inside the public void Configure(IApplicationBuilder app)

var scopeFactory = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>();

var scope = scopeFactory.CreateScope();

var roleManager = scope.ServiceProvider.GetRequiredService<RoleManager<IdentityRole>>();

new UserRoleSeed(roleManager).Seed(); // Where UserRoleSeeding happens

You also need to inherit this IdentityDbContext<ApplicationUser> in your DbContext. Like the sample code below:

public class ProjectDbContext : IdentityDbContext<ApplicationUser>

In implementing this in your controller, I would suggest that you use Dependency Injection similar to the code below:

private readonly UserManager<ApplicationUser> userManager;
private readonly RoleManager<IdentityRole> roleManager;

public TestingController(UserManager<ApplicationUser> userManager, RoleManager<IdentityRole> roleManager){
   this.userManager = userManager;
   this.roleManager = roleManager;
}

public async Task<IActionResult> Index(){
   // Test in getting userManager
   var user = await userManager.GetUserAsync(HttpContext.User);
}