Using the HttpClient service

HTTP is not just for serving web pages – it can also be used for serving data. These are the HTTP methods that we will be using in this chapter:

• GET: This method is used to request one or more resources.
• POST: This method is used to create a new resource.
• PUT: This method is used to update a specified resource.
• DELETE: This method is used to delete a specified resource.

The HttpClient service is a preconfigured service for making HTTP requests from a Blazor WebAssembly app. It is configured in the Program.cs file. The following code is used to configure it:

builder.Services.AddScoped(sp => new HttpClient {
  BaseAddress = new
    Uri(builder.HostEnvironment.BaseAddress) 
});

The HttpClient service is added to a page using dependency injection (DI). To use the HttpClient service in a component, you must inject it by either using the @inject directive or the Inject attribute. For more...