Blazor Introduction 🎯

beginner
14 min

Blazor Introduction 🎯

Welcome to the world of ASP .NET! Today, we're diving into the exciting new framework called Blazor, a tool that lets you build interactive web applications using C#, HTML, and CSS. This tutorial is designed for beginners and intermediates, so don't worry if you're new to the scene! 💡

What is Blazor? 📝

Blazor is an open-source web framework developed by Microsoft. It allows .NET developers to build interactive web apps using C# instead of JavaScript. This makes it easier for .NET developers to build web applications without having to learn JavaScript or a new language.

Why Blazor? 💡

Blazor offers several advantages:

  • Familiar Language: If you're already a .NET developer, you'll find Blazor easier to learn since it uses C#, HTML, and CSS, languages you're already comfortable with.
  • Interactive Web Apps: Blazor allows you to build interactive web apps, just like single-page applications (SPAs) built with JavaScript frameworks like Angular or React.
  • WebAssembly: Blazor uses WebAssembly to run C# code in the browser, making it possible to build web apps with C# and Razor syntax.

Blazor Components 📝

Blazor organizes your code into components. Components are the building blocks of your application, similar to JavaScript's classes or React's components.

What is a Component? 💡

A component is a piece of reusable code that represents a part of your application's UI (User Interface). It can contain HTML, C# code, and Razor syntax, making it easy to create interactive, reusable UI elements.

Blazor Server and Blazor WebAssembly 📝

Blazor offers two hosting models: Blazor Server and Blazor WebAssembly.

Blazor Server 📝

Blazor Server runs on the server and signals changes to the client using SignalR, a real-time communication library. This model is suitable for small to medium-sized applications and is easier to set up.

Blazor WebAssembly 📝

Blazor WebAssembly runs C# code directly in the browser using WebAssembly. This model is suitable for larger applications and offers better performance, but requires more setup.

Getting Started 💡

To get started with Blazor, you'll need:

  • Visual Studio (2019 or newer): Microsoft's Integrated Development Environment (IDE) for .NET development.
  • .NET 5.0 SDK: The .NET 5.0 Software Development Kit (SDK) is required to create Blazor projects.

Creating Your First Blazor App 💡

Let's create a simple Blazor Server app to get a feel for the framework.

  1. Open Visual Studio and create a new project.
  2. Search for "Blazor App" and select "Blazor App (.NET Core)".
  3. Give your project a name and click "Create".

Hello, World! 💡

Now let's modify the App.razor file to display "Hello, World!".

csharp
@page "/" <h1>Hello, World!</h1>
  1. Run your app by clicking the green play button, and you'll see "Hello, World!" displayed in your browser. ✅

Quiz 🎯

Quick Quiz
Question 1 of 1

Which of the following is used to run C# code in the browser with Blazor?

Conclusion 📝

Today, we've introduced Blazor, a powerful web framework that lets you build interactive web apps using C#. We discussed why Blazor is useful, Blazor components, and the different hosting models.

In the next lesson, we'll dive deeper into Blazor components and build a more complex application together. Stay tuned! 🎯