Introduction

In this lesson, you will learn REST API in ASP.NET for beginners. REST API is the most commonly used way to build APIs for web and mobile applications.

What is REST API?

REST (Representational State Transfer) is a type of API that uses HTTP methods to perform operations on data.

HTTP Methods in REST API

• GET → Fetch data
• POST → Create data
• PUT → Update data
• DELETE → Remove data

Example of REST API in ASP.NET

[ApiController]
[Route("api/[controller]")]
public class StudentController : ControllerBase
{
    [HttpGet]
    public string Get()
    {
        return "Get Data";
    }

    [HttpPost]
    public string Post()
    {
        return "Create Data";
    }

    [HttpPut]
    public string Put()
    {
        return "Update Data";
    }

    [HttpDelete]
    public string Delete()
    {
        return "Delete Data";
    }
}

How REST API Works

1. Client sends HTTP request
2. Server processes request
3. Server returns response (usually JSON)

Real-World Use

• Mobile app backend
• Web applications
• Third-party integrations

Key Points

• REST API uses HTTP methods
• Most widely used API type
• Returns data in JSON format

Internal Links

• Course Page: .NET Course for Beginners