A Controller in Asp.net Core is a class that inherits from the Controller base class. It provides various action methods that respond to incoming HTTP requests. Controllers are responsible for processing requests, interacting with models, and returning appropriate responses to clients. They are the primary components that handle routing, request processing, and response generation in an Asp.net Core application.
Here is an example of a Controller in Asp.net Core:
using Microsoft.AspNetCore.Mvc;
public class SampleController : Controller
{
public IActionResult Index()
{
return View();
}
public IActionResult Details(int id)
{
// Retrieve data based on the id
return View();
}
}
ControllerBase :
On the other hand, ControllerBase is a lightweight version of a Controller that provides similar functionalities but without the built-in support for views. ControllerBase is used when you want to create APIs or endpoints that do not require views, such as Web APIs. ControllerBase does not depend on the MVC framework and is more suitable for scenarios where you need to build lean and efficient APIs.
Here is an example of a ControllerBase in Asp.net Core:
using Microsoft.AspNetCore.Mvc;
[Route("api/[controller]")]
[ApiController]
public class SampleApiController : ControllerBase
{
[HttpGet]
public IActionResult Get()
{
// Retrieve and return data
return Ok();
}
[HttpPost]
public IActionResult Post([FromBody] object data)
{
// Process incoming data
return Created("", data);
}
}
Key Differences
- View Support: Controllers have built-in support for views and are used in traditional MVC applications where views are rendered. ControllerBase, on the other hand, is used for APIs that do not require views.
- Inheritance: Controllers inherit from the Controller class, which provides functionalities related to views and MVC. ControllerBase inherits from ControllerBase, which is a more lightweight class suitable for APIs.
- Usage: Controllers are typically used in MVC applications where views are rendered, while ControllerBase is used for building APIs and endpoints that do not involve views.