Understanding MVC in .NET Core
💡 Concept Name
MVC (Model-View-Controller) Pattern in ASP.NET Core
📘 Quick Intro
MVC stands for Model-View-Controller. It's a design pattern that separates an application into three main components, promoting organized, maintainable, and testable code in web development.
🧠 Analogy / Short Story
Think of a restaurant: the Customer interacts with the Waiter (Controller), who takes the order to the Kitchen (Model) and returns a dish (View). Each has a clear role, working together to serve the customer effectively.
🔧 Technical Explanation
- 📦 Model: Represents the application data and business logic.
- 🖼️ View: UI layer to present data (e.g., Razor views).
- 🎮 Controller: Handles incoming HTTP requests and coordinates responses.
- 🌐 ASP.NET Core MVC uses routing to map URLs to controller actions.
- 🛡️ Supports dependency injection, filters, model binding, validation, etc.
🎯 Purpose & Use Case
- ✅ Clean separation of concerns in web applications.
- ✅ Easier to test and maintain applications.
- ✅ Promotes reusable components and logic.
- ✅ Suitable for CRUD apps, admin dashboards, and web portals.
💻 Real Code Example
A simple MVC controller and view:
// Controller
public class HomeController : Controller
{
public IActionResult Index()
{
var message = "Hello from Controller!";
return View("Index", message);
}
}
@model string
<h2>Welcome</h2>
<p>FullStackPrep.Dev.Pages.Articles.webd.BenefitsOfmvcInDotNetModel</p>
❓ Interview Q&A
Q1: What does MVC stand for?
A: Model-View-Controller.
Q2: What is the role of a controller in MVC?
A: Handles user input and interacts with the model to produce a response.
Q3: What is a Razor view?
A: A dynamic HTML template used to present data in ASP.NET Core.
Q4: Where is business logic written in MVC?
A: In the Model layer.
Q5: Can you use dependency injection in controllers?
A: Yes, ASP.NET Core supports DI natively.
📝 MCQs
Q1. What does MVC stand for?
- Model-Value-Control
- Model-View-Command
- Model-View-Controller
- Manage-View-Console
Q2. Which layer displays data to the user?
- Controller
- Model
- View
- Service
Q3. Where should business logic reside in MVC?
- View
- Model
- Controller
- Startup.cs
Q4. How are requests routed in MVC?
- Via appsettings.json
- Using Razor Pages
- Using routing middleware
- Through database config
Q5. What does a Controller return?
- An HTML file
- A View only
- A Model only
- An IActionResult
💡 Bonus Insight
MVC is best suited for apps with clear UI logic and multiple user interaction points. For minimal APIs or service-first designs, ASP.NET Core also supports Razor Pages and API controllers without views.
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