ASP.NET Core - Notes for Beginners

ByAnkush Jain| Last Updated On Sunday, Dec 02, 2018

.NET Core

Disclaimer: I am a consultant at Amazon Web Services, and this is my personal blog. The opinions expressed here are solely mine and do not reflect the views of Amazon Web Services (AWS). Any statements made should not be considered official endorsements or statements by AWS.

ASP.NET Core is a free and open-source web framework, and the next generation of ASP.NET, developed by Microsoft and the community. It is a modular framework that runs on both the full .NET Framework, on Windows, and the cross-platform .NET Core.

ASP.NET Core (Key Points)

• ASP.NET Core is a new framework to build and run applications on cross platforms. We can develop and host ASP.NET Core apps in all major OS i.e. Windows, Linux or Mac.
• ASP.NET Core is basically a Console Application. Its main method creates a server or web host and runs this application on that server.
• There are 3 types of projects in ASP.NET Core. WEB API, ASP.NET Core Razor Pages, ASP.NET Core MVC Style
• It has StartUp.cs class that is being called by the Main method of console application.
• StartUp.cs class is a start-up class that is being invoked when the application runs the first time.
• It has mainly two methods ConfigureServices & Configure & one constructor.
• ConfigureService – You can use this method to configure services. i.e. ASP.NET Core’s default Dependency Injection.
• Configure – You can use this method to register Middleware components in your application request pipeline. i.e. Cookie Based Authentication, Token Based Authentication, Logging, ExceptionHandling, RouteHandling etc.
• ASP.NET Core removes the concept of using System.Web and HTTP Modules to be a part of its request pipeline & it becomes possible due to the concept of Middleware.
• Request Delegates or Middleware Components should be registered in Configure Method.
• Request Delegates or Middleware Component will use extension methods. i.e. Run, Use & Map. These may be anonymous methods also. (Extension Method of IApplicationBuilder class)
• In ASP.NET Core, Middleware is the replacement of HTTP Modules in ASP.NET 4.x or below.
• OWIN is a Middleware for ASP.NET. A replacement of HTTP Modules.
• KATANTA is a project that contains many OWIN Middleware Components that have been developed by the Microsoft team.
• The goal of OWIN is decoupling asp.net web applications from IIS. With the help of OWIN Middleware Components, the app will not rely on System.Web DLL and HTTP Modules.

Few Important Links

• Understanding ASP.NET Core Initialization
• Create a web app with ASP.NET Core MVC using Visual Studio
• Application startup in ASP.NET Core
• ASP.NET Core Middleware
• Token Based Authentication with OWIN Middleware
• Cookie Based Authentication with OWIN Middleware
• Using Cookie Authentication without ASP.NET Core Identity
• Building Web APIs with ASP.NET Core 2.0
• ASP.NET Core Authentication
• JWT Token Based Authentication in ASP.NET Core