Book Image

Blazor WebAssembly by Example, 2e - Second Edition

By : Toi B. Wright
5 (1)
Book Image

Blazor WebAssembly by Example, 2e - Second Edition

5 (1)
By: Toi B. Wright

Overview of this book

Blazor WebAssembly helps developers build web applications without the need for JavaScript, plugins, or add-ons. With its continued growth in popularity, getting started with Blazor now can open doors to new career paths and exciting projects – and Blazor WebAssembly by Example will make your first steps easier. This is a project-based guide that will teach you how to build single-page web applications with Blazor, focusing heavily on the practical over the theoretical by providing detailed step-by-step instructions for each project. The author also includes a video for each project showing her following the step-by-step instructions, so readers can use them if they're unsure about any particular step. In this updated edition, you'll start by building simple standalone web applications and gradually progress to developing more advanced hosted web applications with SQL Server backends. Each project will cover a different aspect of the Blazor WebAssembly ecosystem, such as Razor components, JavaScript interop, security, event handling, debugging on the client, application state, and dependency injection. The book’s projects get more challenging as you progress, but you don’t have to complete them in order, which makes this book a valuable resource for beginners as well as those who just want to dip into specific topics. By the end of this book, you will have experience and lots of know-how on how to build a wide variety of single-page web applications with .NET, Blazor WebAssembly, and C#.
Table of Contents (15 chapters)
13
Other Books You May Enjoy
14
Index

Project overview

In this chapter, we will build a local storage service. The service will both write to and read from the application's Local Storage. We will use JS interop to accomplish this. We will use the InvokeVoidAsync method to write to Local Storage and the InvokeAsync method to read from Local Storage. Finally, we will create a component to test our service. The test component will both read and write Local Storage. It will use JS interop to display the contents of Local Storage in a JavaScript alert box.

The following screenshot shows both the test component and the application’s Local Storage. When the Save to Local Storage button is clicked the value of the text in the localStorageData textbox is saved to Local Storage.

Figure 5.4 – Local Storage Service test page

When the Read from Local Storage button is clicked, the value of localStorageData is displayed in a JavaScript alert box. The following screenshot shows a sample of an alert that is displaying...