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Introduction to Blazor WebAssembly

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Course Number: ASPNC-110

Duration: 3 days (19.5 hours)

Format: Live, hands-on

Blazor Training Overview

Blazor is a hot new .NET Core web technology for hosting applications that can run your client-side C# code directly in the browser using WebAssembly.

In this Introduction to Blazor WebAssembly training course, attendees learn how to build UI apps leveraging the same component-based patterns popularized by libraries such as Angular and React, but using C# programming. Students learn how to reduce dependence on JavaScript UI libraries and frameworks and utilize JavaScript only when needed, not as the basis of their client-side applications. This course also utilizes an ASP.NET Core backend.

Location and Pricing

Accelebrate offers instructor-led enterprise training for groups of 3 or more online or at your site. Most Accelebrate classes can be flexibly scheduled for your group, including delivery in half-day segments across a week or set of weeks. To receive a customized proposal and price quote for private corporate training on-site or online, please contact us.

Objectives

  • Understand the Blazor platform
  • Build UIs with components
  • Utilize data binding and event handling
  • Compose components
  • Build Blazor pages and configure routing
  • Deploy a Blazor WebAssembly application to production
  • Consume server data via REST APIs
  • Unit test Blazor apps

Prerequisites

  • C# programming experience
  • HTML, CSS, and JavaScript development experience

Outline

Expand All | Collapse All

Introduction
  • What is Blazor?
  • Blazor Hosting Models
  • What is Blazor Server vs. Blazor WebAssembly?
  • What is WebAssembly?
  • Browser Compatibility
  • Web Assembly vs. JavaScript
  • How does .NET Core / C# run in a web browser?
Blazor WebAssembly Application
  • Project Template
  • Create a New Application
  • Hosting Blazor WebAssembly with a ASP.NET Core MVC Server
  • Configuration
  • Dependency Injection
  • Environments
  • Logging
  • Handling Errors
  • Debugging WebAssembly
Razor Components and Data Binding
  • What is a Component?
  • Creating a Data Model
  • Binding the Data Model to the HTML
  • Passing Arbitrary Attributes
  • Handling Events
  • Manually Trigger State Updates and Re-rendering
Composing Razor Components
  • Decompose a Component into Smaller Components
  • One-Way Data Binding
  • Two-Way Data Binding
  • Pass Data from a Parent Component to a Child Component using Parameters
  • Pass Data from a Child Component to a Parent Component using Event Callbacks
  • Use Keys to Optimize Performance
  • Use Refs to Access DOM Elements
  • Razor Component Libraries
  • Razor Component Design Patterns
    • Parameters are Immutable
    • Lift State Up
    • Managing State in General
Razor Component Forms
  • What is the purpose of Form?
  • Collecting Data using a Form, Input, Select and Textarea Elements
  • Explore Form Element Two-Data Binding
  • Build Forms with the Blazor Edit Form Razor Component
  • Explore the Concept of the Edit Context
  • Use the Specialized Edit Form Controls
    • Input Text
    • Input TextArea
    • Input Select
    • Input Number
    • Input Checkbox
    • Input Date
  • Applying Validation to the Form
  • Decorating the View Model with Validation Attributes
  • Code Custom Validation Attributes
Razor Component Pages
  • What is the Page model?
  • Differences between Razor Pages and Razor Components
  • Using a Razor Component as a Page
  • Explore the Router Component
  • Configuring Page Routing
  • Route to Components from Multiple Assemblies
  • Using Route Parameters
  • Using the Query String
  • Applying Authorization to a Razor Component Page
  • Using Authorization within the Component Tree
Using Server Data
  • ASP.NET Core MVC Web API
    • What is ASP.NET Core MVC?
    • What is a REST API?
    • What is an API Controller?
    • Injecting the Http Client
    • Exploring the Http Client
    • Calling a REST API from a Blazor Component using the HttpClient
Interacting with JavaScript
  • What is the JavaScript Interop?
  • When is JavaScript needed?
  • Synchronous vs. Asynchronous Calls
  • How to call a JavaScript function from a Component
  • How to call C# code from JavaScript
  • Calling Static Methods
  • Calling Instance Methods
  • Organizing JavaScript Code within a Blazor WebAssembly App
  • Explore JavaScript Ecosystem
    • Client-Side Libraries
    • NPM & Yarn
    • Webpack
    • Useful Libraries
Unit Testing
  • What is Unit Testing?
  • Principles of Unit Testing
    • Defining a Unit
    • Setup/Teardown
    • Testing in Isolation
    • Determining What to Test
    • Code Coverage
    • Test Frameworks
    • Stubs, Mocks and Spies
  • xUnit
    • What is xUnit?
    • Testing Framework
    • Facts vs. Theory
    • Assertions
    • Integration with Visual Studio
  • Razor Components
    • What Should be Tested on a Razor Component?
    • What is bUnit?
    • Using bUnit with xUnit
    • Setup and define components under tests in C# or Razor syntax
    • Verify outcome using semantic HTML comparer
    • Interact with and inspect components
    • Trigger event handlers
    • Provide cascading values
    • Inject services
    • Mock IJsRuntime
    • Perform snapshot testing
Conclusion

Training Materials:

All Blazor training students receive comprehensive courseware.

Software Requirements:

  • Windows 10 or later with at least 8 GB RAM
  • Visual Studio 2019 or later
  • .NET Core 3.1 or later SDK
  • LocalDB or another version of SQL Server
  • Postman application
  • Additional lab files that Accelebrate provides
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Related Topics

Full Stack Web Programming with Blazor WebAssembly and ASP.NET Core Web API
Progressive Web Application Development using EF Core and Blazor New
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