In ASP.NET Core, How Can You Create A Custom AuthorizeAttribute Using C#?

To create a custom AuthorizeAttribute in ASP.NET Core, you can follow these steps:

  1. Create a new class that inherits from the AuthorizeAttribute class:
using Microsoft.AspNetCore.Authorization;

public class CustomAuthorizeAttribute : AuthorizeAttribute
{
    // Implement any additional logic or properties if needed

    public CustomAuthorizeAttribute()
    {
        // Set your desired policy or authentication scheme
        Policy = "YourPolicyName";
    }
}
  1. Register your custom attribute globally in the Startup.cs file within the ConfigureServices method:
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

public class Startup
{
    // Other methods and configuration

    public void ConfigureServices(IServiceCollection services)
    {
        // Other configuration

        services.AddControllersWithViews();
        
        // Register the custom attribute globally
        services.AddMvc(options => 
        {
            options.Filters.Add(typeof(CustomAuthorizeAttribute));
        });
    }

    // Other methods and configuration
}
  1. Now, you can use your custom AuthorizeAttribute on controller actions or controllers, just like any other built-in attribute:
using Microsoft.AspNetCore.Mvc;

[CustomAuthorize] // Apply the custom attribute on an action method
public class HomeController : Controller
{
    [CustomAuthorize] // Apply the custom attribute on a specific action method
    public IActionResult Index()
    {
        // Your action logic here
    }
}

This way, every action method or controller decorated with CustomAuthorize attribute will require the specified authorization policy for access.

About the Author Rex

I'm a passionate tech blogger with an insatiable love for programming! From my early days tinkering with code, I've delved into web dev, mobile apps, and AI. Sharing insights and tutorials with the world is my joy, connecting me to a global community of like-minded tech enthusiasts. Python holds a special place in my heart, but I embrace all challenges. Constantly learning, I attend tech conferences, contribute to open-source projects, and engage in code review sessions. My ultimate goal is to inspire the next generation of developers and contribute positively to the ever-evolving tech landscape. Let's code together!