“ASP.NET Core. Features and architecture”

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This document provides an overview of ASP.NET Core features and architecture. It discusses the generic host, startup class, middlewares, dependency injection container, configuration, and types of ASP.NET projects. Demos are also included showing how to create middleware, routing, Web API applications, and configure the built-in DI container and configuration.

ASP.NET Core
Features and architecture
By Yan Gorshkov
Event Name
Play
hys-enterprise.com

HYS Enterprise is a Dutch software
development company with more than
200 talented engineers from all over
the world hys-enterprise.com
Ukraine
Netherlands

About me
• Middle Full Stack .Net Developer
• 3 years at HYS Enterprise
• Back-end skills: C#, ASP.Net Core, EF Core
• Front-end skills: TypeScript, Angular
ASP.NET Core.
Features and architecture

About webinar
• ASP.NET Core general overview
• Generic Host: creating and starting
• Startup class and Environments
• Middlewares and Logging
• Built-in DI-container
• Configuration and options pattern
• Types of project
ASP.NET Core.
Features and architecture

.NET 5 and ASP.NET
ASP.NET Core.
Features and architecture

Demo: .NET CLI and First
ASP.NET Application
ASP.NET Core.
Features and architecture

Generic Host
The CreateDefaultBuilder method:
• Sets the content root;
• Load host configuration (Environment variables prefixed
with DOTNET_);
• Loads app configuration;
• Adds login providers (Console, Debug, EventSource).
ASP.NET Core.
Features and architecture
The ConfigureWebHostDefaults method:
• Loads host configuration from environment variables
prefixed with ASPNETCORE_;
• Sets Kestrel server as the web server and configures it
using the app's hosting configuration providers;
• Enables IIS integration
• Allow you to configure http pipeline.

Startup class
Startup class is a heart of ASP.NET Core app
Contains 2 methods:
• ConfigureServices (optional) – DI-container configuration;
• Configure – HTTP request pipeline configuration.
ASP.NET Core.
Features and architecture

Middlewares
The mechanism allows you to configure HTTP request
pipeline from start to end.
A short list of built-in middlewares:
• Authentication;
• Authorization;
• CORS;
• HTTPS redirection;
• Session;
• Static files.
ASP.NET Core.
Features and architecture

Demo: Create new middleware
ASP.NET Core.
Features and architecture

Routing
The way to map an incoming request with a business logic
Apps can configure routing using:
• Endpoint-enabled middleware;
• Controllers;
• Razor Pages;
• SignalR;
• gRPC Services.
ASP.NET Core.
Features and architecture

Demo: Routing with
UseEndpoints middleware
ASP.NET Core.
Features and architecture

Web API Application
• Allows to create a RESTful API.
• The way to structure your logic using controllers.
• Allows to create an OpenAPI specification (Swаgger)
Each controller has a set of actions (handlers)
ASP.NET Core.
Features and architecture

Demo: Creating Web API
application via Visual Studio
ASP.NET Core.
Features and architecture

DI-Container
• DI-Container – one place to register services
(dependencies);
• DI-Container manages the lifetime of objects;
• Following Dependency Inversion principle, we can easily
replace one service implementation with another for the
whole project.
ASP.NET Core.
Features and architecture

Demo: Built-in DI-container
ASP.NET Core.
Features and architecture

Configuration
• IConfiguration service allows us to get options from
appsetings.json config file;
• We can add environment-specific config file to override
some options;
• Options pattern introduces a mechanism to use complex
configuration structures as objects.
ASP.NET Core.
Features and architecture

Demo: Configuration
ASP.NET Core.
Features and architecture

Types of ASP.NET projects
• Empty project
• Web API
• Web API + Angular/React
• MVC
• Razor Pages
• Blazor
• gRPC service
ASP.NET Core.
Features and architecture

Web Servers
• Kestrel – default, cross platform and lightweight web-
server implementation;
• HTTP.sys
• IIS, Nginx, Apache can be used as reverse proxy
ASP.NET Core.
Features and architecture

Links
• GitHub with examples: https://github.com/yan1998/ASPNETCoreWebinar
• My Facebook: https://www.facebook.com/gorshkov.yan/
• My LinkedIn: https://www.linkedin.com/in/yan-gorshkov-898325137/
• ASP.NET Core docs: https://docs.microsoft.com/en-us/aspnet/core/introduction-to-aspnet-core?view=aspnetcore-5.0
• ASP.NET Core architecture: https://dotnet.microsoft.com/learn/aspnet/architecture
ASP.NET Core.
Features and architecture

Thank you
For your attention!
Any Questions?
ASP.NET Core.
Features and architecture

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