ASP.NET Web API Tutorial For Begineers and Professionals

ASP.NET Web API Tutorials For Beginners and Professionals

ASP.NET Web API Tutorials

In this ASP.NET Web API Tutorials For Beginners and Professionals series, I will cover all the features of ASP.NET Web API. You will learn from basic to advanced level features of ASP.NET Web API. The term API stands for Application Programming Interface, and ASP.NET Web API is a framework provided by Microsoft that makes it easy to build Web APIs, i.e., it is used to develop HTTP-Based Web Services on top of .NET Framework.

Today, a web-based application cannot reach all its customers or users. Nowadays, People have become very smart, which means they use iPhones, mobile, tablets, etc., daily. These devices have a lot of useful apps for making their life easy. In simple words, we can say that we are moving from the web toward the app world.

So, if we like to expose our service data to the browsers and to all these modern device apps in a fast, secure, and simple way, we should have an API compatible with all browsers and all these modern devices.

Theis ASP.NET Web API Tutorial Is For Whom?

This ASP.NET Web API Course is designed for beginners and experienced ASP.NET Web API developers who want to learn ASP.NET Web API from scratch with real-time examples.

The articles start from the basics of ASP.NET Web API and cover advanced concepts as we progress. If you are confident with the concepts discussed here, I am sure you will be in a much better position to answer most of the interview questions, and you can develop any real-time applications using ASP.NET Web API.

What is ASP.NET Web API?

The ASP.NET Web API is a framework provided by Microsoft, which makes it easy to build Web APIs, i.e., HTTP-Based Services. The ASP.NET Web API is an ideal platform for building Restful services with the .NET Framework. These Web API services can be consumed by a variety of clients, such as

  1. Browsers
  2. Mobile applications
  3. Desktop applications
  4. IOTs, etc.
Why ASP.NET Web API?

ASP.NET Web API is a framework developed by Microsoft for building HTTP-based web services and APIs (Application Programming Interfaces). It is a part of the larger ASP.NET ecosystem and is designed explicitly for creating RESTful APIs that various clients, such as web applications, mobile apps, and other services, can consume.

Here are some key features and concepts associated with ASP.NET Web API:

  • RESTful Architecture: Web API encourages the use of Representational State Transfer (REST) principles, which emphasize using standard HTTP methods (GET, POST, PUT, DELETE, etc.) to perform CRUD (Create, Read, Update, Delete) operations on resources. RESTful APIs are known for their simplicity, scalability, and ease of use.
  • Attribute Routing: ASP.NET Web API allows you to define routes for your API endpoints using attributes, making it easy to map HTTP requests to specific controller actions and methods.
  • Content Negotiation: Web API supports content negotiation, allowing clients to request data in different formats such as JSON, XML, or others. This enables clients to specify their preferred format using the Accept header in the HTTP request.
  • Model Binding: ASP.NET Web API provides automatic model binding, which means it can automatically deserialize incoming HTTP request data (e.g., JSON or XML) into strongly typed objects and vice versa. This simplifies the handling of input and output data.
  • Authentication and Authorization: Web API supports various authentication and authorization mechanisms, including OAuth, JWT (JSON Web Tokens), API keys, and more, to secure your API endpoints and control access to resources.
  • Action Filters: You can use action filters to add cross-cutting concerns such as validation, logging, and exception handling to your API endpoints.
  • Versioning: ASP.NET Web API allows you to version your APIs, ensuring backward compatibility while introducing new features or breaking changes.
  • Dependency Injection: It integrates with the ASP.NET Core Dependency Injection framework, making it easy to manage and inject dependencies into your API controllers and services.
  • Testing: Web API controllers and actions can be easily unit-tested using standard testing frameworks.
What will you Learn from These ASP.NET Web API Tutorials?

In this ASP.NET Web API Tutorials article, you will learn ASP.NET Web API Framework from basics to advanced level concepts such as Routing, CORS, HMAC, Security, Token-Based Authentication, API Versioning, etc. I hope this article series will help you with your needs. I would like to have your feedback. Please post your feedback, questions, or comments about this article series.

Prerequisites to Learn ASP.NET Web API

Learning ASP.NET Web API effectively requires understanding several underlying concepts and technologies. Below are the prerequisites that should ideally be covered before diving into ASP.NET Web API. If you don’t know the following concepts, then don’t worry. We will explain each concept in detail.

  • Basic Knowledge of Web Development: Understanding the basics of how the web works, including HTTP/HTTPS, request/response models, web servers, clients, browsers, and the overall architecture of web applications.
  • HTML/CSS/JavaScript: While ASP.NET Web API is primarily a back-end technology, knowing how the front-end works will help you in designing and testing APIs since you’ll often need to create services that are going to be consumed by clients.
  • C# Programming: Since ASP.NET Web API is a framework where we need to write the code using C#, you should have a good understanding of C#, including control flow, classes, objects, generics, collections, exception handling, and asynchronous programming.
  • .NET Framework: A solid understanding of the .NET ecosystem, runtime, and class libraries. Knowing the differences between .NET Framework and .NET Core (or the unified .NET 5+) is also useful.
  • Entity Framework and LINQ: For Data-Driven APIs, knowledge of Entity Framework, an ORM (Object-Relational Mapper) for .NET, is beneficial. LINQ is also important for querying databases within the .NET environment.
  • RESTful Services: Understanding the principles of RESTful services, including resource-based architecture, statelessness, HTTP methods (GET, POST, PUT, DELETE), and status codes, is essential.
  • JSON/XML: Familiarity with JSON and XML, the two most common formats for sending and receiving data in web APIs.
  • Authentication & Authorization: Basic understanding of authentication and authorization mechanisms, including OAuth, JWT (JSON Web Tokens), etc., since securing your API is critical.
  • Testing: Knowledge of testing, including unit testing and integration testing, is important for ensuring the quality and reliability of your API.
  • Hosting and Deployment: Understanding how to host and deploy web applications using IIS will be necessary for making your API available to users.

Note: If we missed any concept of ASP.NET Web API, please let us know by giving a comment in the comment box, and we promise as soon as possible, we will make an article and publish it in this course.

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Author: Pranaya Rout Pranaya Rout is a Senior Technical Architect with more than 11 Years of Experience, Microsoft MVP, Author, YouTuber, and Blogger eager to learn new technologies. Pranaya Rout has published more than 3,000 articles in his 11-year career. Pranaya Rout has very good experience with Microsoft Technologies, Including C#, VB, ASP.NET MVC, ASP.NET Web API, EF, EF Core, ADO.NET, LINQ, SQL Server, MYSQL, Oracle, ASP.NET Core, Cloud Computing, Microservices, Design Patterns and still learning new technologies.

Online Training Program

ASP.NET WEB API – Basics

WEB API Routing and Attribute Routing

ASP.NET WEB API – Security

Web API Versioning

Advanced Concepts

Popular ASP.NET Web API Books

15 thoughts on “ASP.NET Web API Tutorials For Beginners and Professionals”

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  2. Hello, I want to learn Web API through this tutorial but would wanna know if it’s updated and valid. Please let me know.

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