Handling HTTP Status Codes — Complete Guide

Handling HTTP Status Codes — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of ASP.NET Core MVC Tutorial on Toolliyo Academy.

8 min read Updated 6/25/2026

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ASP.NET Core MVC Tutorial · Lesson 128 of 200

Handling HTTP Status Codes

Getting Started ✓ → Core MVC ✓ → Data & Security ✓ → Production ✓ → Career ✓

Interview Ready · 10 — Interview Prep · ~10 min · Section 14: Filters

What is this?

Handling HTTP Status Codes runs code before or after actions — logging, auth, caching, or custom error handling.

Why should you care?

Filters keep controllers thin and apply cross-cutting rules in one place.

See it live — copy this example

Create an MVC project (dotnet new mvc), add the code, and run dotnet run.

// Handling HTTP Status Codes — ShopNest.Mvc example
public class HomeController : Controller
{
    public IActionResult Index() => View();
}

Run Example »

Edit the code and click Run — like W3Schools Try it Yourself.

Code

Result

What happened?

Study the example line by line.
Each part connects to Handling HTTP Status Codes.
Edit one line, save, and run dotnet run to see what changes.

Try it yourself

Register or apply the filter from the example.
Hit an action that should trigger it.
Check logs or response headers to confirm it ran.
Change text or labels in the example and run again — watch the browser update.
Break the code on purpose (remove a semicolon), read the error message, then fix it.

Remember

You learned what Handling HTTP Status Codes is and when to use it. Practice by changing the example yourself. Explain it in your own words before moving on.