Book Image

Web Development with Blazor

By : Jimmy Engström
Book Image

Web Development with Blazor

By: Jimmy Engström

Overview of this book

Blazor is an essential tool if you want to build interactive web apps without JS, but it comes with its own learning curve. Web Development with Blazor will help you overcome most common challenges developers face when getting started with Blazor and teach you the best coding practices. You’ll start by learning how to leverage the power of Blazor and explore the full capabilities of both Blazor Server and Blazor WebAssembly. Then you’ll move on to the practical part, which is centred around a sample project – a blog engine. This is where you’ll apply all your newfound knowledge about creating Blazor Server and Blazor WebAssembly projects, the inner working of Razor syntax, and validating forms, as well as creating your own components. You’ll learn all the key concepts involved in web development with Blazor, which you’ll also be able to put into practice straight away. By showing you how all the components work together practically, this book will help you avoid some of the common roadblocks that novice Blazor developers face and inspire you to start experimenting with Blazor on your other projects. When you reach the end of this Blazor book, you'll have gained the confidence you need to create and deploy production-ready Blazor applications.
Table of Contents (20 chapters)
1
Section 1:The Basics
4
Section 2:Building an Application with Blazor
14
Section 3:Debug, Test, and Deploy

Adding authorization

At this point, we know whether the user is authenticated or not, but does the user have access to a specific function? That is what authorization is all about. Luckily, the built-in functions support this as well, even though we have to write some code for it.

The server side has all the tables needed to add roles to our users. There are, however, no UIs available. For our application, we'll just add a role manually in the database, but first, we need to configure roles.

Adding roles from the server

Execute the following steps to add roles from the server:

  1. In the MyBlogWebAssembly.Server project, open the Startup.cs file.
  2. In the ConfigureServices method, add options to .AddApiAuthorization and remove the default claim mapping as follows:
    .AddApiAuthorization<AppUser, MyBlogDbContext>(options =>
    {                 
        options...