European ASP.NET 4.5 Hosting BLOG

BLOG about ASP.NET 4, ASP.NET 4.5 Hosting and Its Technology - Dedicated to European Windows Hosting Customer

European ASP.NET Core 8.0.1 Hosting - HostForLIFE :: C# &.NET: Experimental Attribute

clock April 16, 2024 08:45 by author Peter

You can add the Experimental property to your types, methods, or assemblies to designate that a feature is experimental using the new Experimental attribute in C# 12. When someone tries to use the method or the type after you've done this, the compiler will throw an error. I describe how to use this functionality in this article.


I used Visual Studio 2022 Preview to construct a console application with.NET 8 and run it for demonstration purposes. Use of the Preview version is required until the article's date. This feature will not function otherwise.

The System.Diagnostics.CodeAnalysis namespace is where the Experimental attribute originates. You can see an example of a class with this attribute in the code below:

using System.Diagnostics.CodeAnalysis;

namespace DotNet8Examples
{
    [Experimental(diagnosticId: "Test001")]
    public class ExperimentalAttributeDemo
    {
        public void Print()
        {
            Console.WriteLine("Hello Experimental Attribute");
        }
    }
}


On line 1, there is the namespace for the Experimental attribute.
On line 5, there is the Experimental attribute, with the diagnosticId. For the diagnosticId, you can specify an Id, which will be used by the compiler, to report a usage of the API the attribute applies to.
On line 8, there is a method for this class.

Now, if you try to create an instance of this class, the compiler will complain about it:
var experimentalAttributeDemo = new ExperimentalAttributeDemo();

It should be noted that the Experimental property can be used in both the method and the class. You can use the NoWarn property in the.csproj file to use this class and ignore this error; this will work on a global level, so each time you try to use the class or method, you won't have to suppress the error; alternatively, you can suppress it directly on the code, which will require you to do so each time you need to use the class or method.

I'm directly suppressing the error Test001 in the code in the example below. In order to do it, you must add your code in between the #pragma warning disable Test001 and the #pragma warning restore Test001:



European ASP.NET Core 8.0.1 Hosting - HostForLIFE :: Using Identity for NET API Login and Registration

clock April 2, 2024 08:18 by author Peter

Creating reliable and secure online apps requires careful consideration of authentication and authorization. Microsoft Identity offers a strong foundation for implementing authorization and authentication features with ease in the.NET ecosystem. In this post, we'll look at how to use Microsoft Identity in conjunction with controllers to efficiently handle user registration and login functions in a.NET API.

Required conditions

Make sure you have installed the following prerequisites before continuing:

  • The.NET SDK (at least version 5)
  • Visual Studio Code (optional) or Visual Studio


Establishing the Project
Let's start by making a new.NET Web API project:

dotnet new webapi -n YourProjectName
cd YourProjectName


Adding Identity to the Project
To add Identity to your project, run the following commands:
dotnet add package Microsoft.AspNetCore.Identity.EntityFrameworkCore
dotnet add package Microsoft.EntityFrameworkCore.SqlServer

This adds the necessary packages to your project for using Identity and Entity Framework Core with SQL Server.

Scaffold Identity

Next, scaffold Identity into your project:
dotnet aspnet-codegenerator identity -dc YourDbContext

Replace YourDbContext with the name of your application's DbContext.
Implementing Registration and Login Controllers:

Now, let's implement controllers for user registration and login.

1. Registration Controller

using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using System.Threading.Tasks;
using YourProjectName.Models;

namespace YourProjectName.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class RegisterController : ControllerBase
    {
        private readonly UserManager<ApplicationUser> _userManager;

        public RegisterController(UserManager<ApplicationUser> userManager)
        {
            _userManager = userManager;
        }

        [HttpPost]
        public async Task<IActionResult> Register(RegisterModel model)
        {
            var user = new ApplicationUser { UserName = model.Email, Email = model.Email };
            var result = await _userManager.CreateAsync(user, model.Password);
            if (result.Succeeded)
            {
                return Ok("Registration successful");
            }
            return BadRequest(result.Errors);
        }
    }
}

2. Login Controller
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using System.Threading.Tasks;
using YourProjectName.Models;

namespace YourProjectName.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class LoginController : ControllerBase
    {
        private readonly SignInManager<ApplicationUser> _signInManager;

        public LoginController(SignInManager<ApplicationUser> signInManager)
        {
            _signInManager = signInManager;
        }

        [HttpPost]
        public async Task<IActionResult> Login(LoginModel model)
        {
            var result = await _signInManager.PasswordSignInAsync(model.Email, model.Password, false, false);
            if (result.Succeeded)
            {
                return Ok("Login successful");
            }
            return Unauthorized("Invalid email or password");
        }
    }
}

Models
Ensure you have the necessary models for registration and login:
namespace YourProjectName.Models
{
    public class RegisterModel
    {
        public string Email { get; set; }
        public string Password { get; set; }
    }

    public class LoginModel
    {
        public string Email { get; set; }
        public string Password { get; set; }
    }
}


Configuring Startup
Finally, add Identity services to the ConfigureServices method in Startup.cs:
services.AddIdentity<ApplicationUser, IdentityRole>()
    .AddEntityFrameworkStores<YourDbContext>()
    .AddDefaultTokenProviders();

Happy coding!



About HostForLIFE.eu

HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

We have offered the latest Windows 2016 Hosting, ASP.NET Core 2.2.1 Hosting, ASP.NET MVC 6 Hosting and SQL 2017 Hosting.


Tag cloud

Sign in