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Hi, today I am going to take you through a simple dot Net Core API backend and Angular 7 frontend Authentication system. This is the first post of a series of post as I build an e-commerce platform using dot net and Angular.

Your new AutheticationContext class will extend IdentityDbContext

Then create a constructor and pass in the DbContextOptions as a parameter in the new constructor and the Base class constructor.

DbContextOptions takes the DB provider and the connectionstring as parameters. we use Dependency injection

Dependency Injection – In Startup.cs in your ConfigureServices method adds this code. There will be no need to use new to create an instance of AuthenticationContext class when you need to use it

 services.AddDbContext<AuthenticationContext>(options => options.UseSqlServer(Configuration.GetConnectionString("IdentityConnection")));

NB UseSqlServer will throw an error you can fix it as below

In your NuGet Manager run this command

Install-Package Microsoft.EntityFrameworkCore.SqlServer

You will need to create the connectionstring in your appsettings.json

"ConnectionString": {
    "IdentityConnection": "Server=DESKTOP-G3UF4QR\\SQLEXPRESS; Database=tenderSA; Trusted_Connection=True; MultipleActiveResultSets=True"
  }

Customising Identity User

Create a model class that extends/ inherits IndentityUser Class. Then create a new property

        //customising column data type
        [Column(TypeName = "nvarchar(100)")]
        public string Fullname { get; set; }

Add a property in your AutheticationContext class

public DbSet<ApplicationUser> ApplicationUsers { get; set; }

Add Migrations

In your package manager console run this command

Add-Migration "intial"

NB if that fails install this

install-package Microsoft.EntityFrameworkCore.Tools