ASP.NET API - Unable to create a DbContext

Thanks.. it is working.. but i have a doubt..

Microsoft.AspNetCore.Identity.UI

Does this package provide ui ?

i am using only controller api for Angular.

i want to learn ui from asp.net

but there are lot of them. i don’t know which one should i learn.

But i love asp.net api

it is wonderful.

Hi @Mahesh Kumar

Microsoft.AspNetCore.Identity.UI Does this package provide ui ?

Yes, the Microsoft.AspNetCore.Identity.UI contains the ASP.NET Core Identity UI, it is the default Razor Pages built-in UI for the ASP.NET Core Identity framework. And generally, we will use it in Razor Page and MVC application.

For your API application, there is no need to use the Microsoft.AspNetCore.Identity.UI package, you can use AddIdentityApiEndpoints, like this:

builder.Services.AddIdentityApiEndpoints<User>()
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<AppDbContext>();

Then, you can directly access the Identity Api endpoints, check this screenshot:

In this sample, I use the Angular and Asp.net Core template create a new application, and the in the API application, install the following packages:

• Microsoft.AspNetCore.Identity.EntityFrameworkCore
• Microsoft.EntityFrameworkCore.SqlServer
• Microsoft.EntityFrameworkCore.Tools
• Swashbuckle.AspNetCore

The Program.cs file in the API controller like this:

using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore; 
using Net9AngularApp.Server.Data;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
builder.Services.AddDbContext<AppDbContext>(options =>
    options.UseSqlServer(connectionString));
 
builder.Services.AddIdentityApiEndpoints<User>()
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<AppDbContext>();

builder.Services.AddControllers();
// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
builder.Services.AddOpenApi();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
app.UseDefaultFiles();
app.MapStaticAssets();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
    app.UseSwagger();
    app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.MapIdentityApi<User>();
app.UseAuthorization();
app.MapControllers();
app.MapFallbackToFile("/index.html");
app.Run();

The migration works well, and we can see the identity API endpoints via Swagger.

More detail information about using identity in SPA, you can check How to use Identity to secure a Web API backend for SPAs

Best regards,
Dillion