What's New in ASP.NET Core 3
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The document provides an overview of the new features and improvements in ASP.NET Core 3.0, including support for .NET Core 3.0, enhanced JSON serialization with System.Text.Json, and various performance enhancements. It introduces Blazor for building interactive web UIs using C#, as well as the gRPC framework for high-performance RPC communications. It also mentions breaking changes in ASP.NET Core 3.1 and provides links to additional resources and demos.
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New Razor directives
• @attribute – The @attribute directive applies the given attribute to
the class of the generated page or view. For example, @attribute
[Authorize].
• @implements – The @implements directive implements an interface
for the generated class. For example, @implements IDisposable.](https://image.slidesharecdn.com/aspnetcore3whatsnew-191117094618/85/What-s-New-in-ASP-NET-Core-3-18-320.jpg)
![#vssatpn
SignalR
SignalR now uses System.Text.Json to serialize/deserialize JSON message
Support for automatic reconnect
.withAutomaticReconnect()
.withAutomaticReconnect([0, 3000, 5000, 10000, 15000, 30000])
Client-to-server streaming](https://image.slidesharecdn.com/aspnetcore3whatsnew-191117094618/85/What-s-New-in-ASP-NET-Core-3-19-320.jpg)
What's New in ASP.NET Core 3
- 1. #vssatpn Visual Studio Saturday 2019 What's New in ASP.NET Core 3 Andrea Dottor www.dottor.net www.linkedin.com/in/andreadottor
- 2. #vssatpn ASP.NET Core 3.0 only runs on .NET Core 3.0 .NET Core 3.0 implements .NET Standard 2.1 .NET Core 3.0 adds support for C# 8.0 It's highly recommended that you use Visual Studio 2019 version 16.3 or newer, Visual Studio for Mac 8.3 or newer, or Visual Studio Code with the latest C# extension.
- 3. #vssatpn ASP.NET Core 3.0 only runs on .NET Core 3.0
- 4. #vssatpn New JSON serialization ASP.NET Core 3.0 now uses System.Text.Json by default for JSON serialization: • Reads and writes JSON asynchronously. • Is optimized for UTF-8 text. • Typically higher performance than Newtonsoft.Json.
- 5. #vssatpn Template changes The cookie consent UI is no longer included Scripts and related static assets are now referenced as local files instead of using CDNs. The Angular template updated to use Angular 8. …
- 6. #vssatpn Performance improvements • Reduction in memory usage when using the built-in dependency injection container for scoped services. • Reduction in allocations across the framework, including middleware scenarios and routing. • Reduction in memory usage for WebSocket connections. • Memory reduction and throughput improvements for HTTPS connections. • New optimized and fully asynchronous JSON serializer. • Reduction in memory usage and throughput improvements in form parsing.
- 8. #vssatpn gRPC A high performance, open-source universal RPC framework gRPC is a modern open source high performance RPC framework that can run in any environment. It can efficiently connect services in and across data centers with pluggable support for load balancing, tracing, health checking and authentication. It is also applicable in last mile of distributed computing to connect devices, mobile applications and browsers to backend services. https://grpc.io/
- 9. #vssatpn gRPC Contract-first approach to API development. Modern technologies: • HTTP/2 for transport. • Protocol Buffers as the interface description language. • Binary serialization format.
- 10. #vssatpn gRPC - code generation Language Platform Compiler C/C++ Linux/Mac GCC 4.8+ Clang 3.3+ C/C++ Windows 7+ Visual Studio 2015+ C# Linux/Mac .NET Core, Mono 4+ C# Windows 7+ .NET Core, .NET 4.5+ Dart Windows/Linux/Mac Dart 2.0+ Go Windows/Linux/Mac Go 1.6+ Java Windows/Linux/Mac JDK 8 recommended. Gingerbread+ for Android Node.js Windows/Linux/Mac Node v4+ Objective-C Mac OS X 10.11+/iOS 7.0+ Xcode 7.2+ PHP (Beta) Linux/Mac PHP 5.5+ and PHP 7.0+ Python Windows/Linux/Mac Python 2.7 and Python 3.4+ Ruby Windows/Linux/Mac Ruby 2.3+
- 12. #vssatpn gRPC tutto bello, anzi bellissimo! * *non funziona (per il momento) su IIS, e non funziona su Azure App Service
- 13. #vssatpn gRPC tutto bello, anzi bellissimo! * *non funziona (per il momento) su IIS, e non funziona su Azure App Service
- 14. #vssatpn Blazor
- 15. #vssatpn Blazor Blazor is a framework for building interactive client-side web UI with .NET: • Create rich interactive UIs using C# instead of JavaScript. • Share server-side and client-side app logic written in .NET. • Render the UI as HTML and CSS for wide browser support, including mobile browsers. Blazor framework supported scenarios: • Reusable UI components (Razor components) • Client-side routing • Component layouts • Support for dependency injection • Forms and validation • Build component libraries with Razor class libraries • JavaScript interop
- 16. #vssatpn Blazor Blazor Server ASP.NET Core 3.0 Blazor WebAssembly (preview) maggio 2020
- 17. #vssatpn Razor components • A component in Blazor is formally referred to as a Razor component. • .razor file using a combination of C# and HTML markup • Can use in existing Razor Pages or MVC apps
- 18. #vssatpn New Razor directives • @attribute – The @attribute directive applies the given attribute to the class of the generated page or view. For example, @attribute [Authorize]. • @implements – The @implements directive implements an interface for the generated class. For example, @implements IDisposable.
- 19. #vssatpn SignalR SignalR now uses System.Text.Json to serialize/deserialize JSON message Support for automatic reconnect .withAutomaticReconnect() .withAutomaticReconnect([0, 3000, 5000, 10000, 15000, 30000]) Client-to-server streaming
- 21. #vssatpn Worker Service New template for worker services for long running tasks such as Windows Services or Linux Systemd daemons The worker class implements the BackgroundService class BackgroundService is a base class for implementing a long running IHostedService Use Dependency Injection
- 23. #vssatpn Migration from ASP.NET Core 2.2
- 24. #vssatpn Migration from ASP.NET Core 2.2
- 25. #vssatpn ASP.NET Core 3.1 preview 3 (14 novembre) Breaking changes: • Reacting to browser SameSite changes in 3.1.0-preview1, impacts OpenIdConnect The primary goal of .NET Core 3.1 is to polish the features and scenarios we delivered in .NET Core 3.0. .NET Core 3.1 will be a long term support (LTS) release, supported for at least 3 years.
- 26. #vssatpn Links • Codice demo: https://github.com/andreadottor/VSSaturdayPN2019 • Slide: https://www.slideshare.net/andreadottor/ • Links: • https://docs.microsoft.com/en-us/aspnet/core/release-notes/aspnetcore-3.0?view=aspnetcore-3.0 • https://blog.zhaytam.com/2019/09/13/whats-new-asp-net-core-3/ • https://devblogs.microsoft.com/aspnet/asp-net-core-updates-in-net-core-3-1-preview-3/ • https://github.com/dotnet/core/tree/master/release-notes/3.1
- 27. #vssatpn Thanks
- 28. #vssatpn www.dottor.net andrea@dottor.net @dottor Andrea Dottor Microsoft MVP Developer Technologies Podcast .NET in pillole • Spotify • Spreaker • Apple podcast • Google podcast • YouTube www.linkedin.com/in/andreadottor
- 29. Podcast ".NET in pillole" • Spotify: https://open.spotify.com/show/7jyoG6BBmzvScNOqSpVvQQ • Spreaker: https://www.spreaker.com/show/net-in-pillole • Apple podcast: https://podcasts.apple.com/it/podcast/net-in- pillole/id1478648398 • Google podcast: https://podcasts.google.com/?feed=aHR0cHM6Ly93d3cuc3By ZWFrZXIuY29tL3Nob3cvMzY4NTM0NC9lcGlzb2Rlcy9mZWVk • YouTube: https://www.youtube.com/user/andreadottor/