This is a class library that provides gamepad API access for your Blazor apps.

"Blazor Gamepad" ver.7.x supports Blazor versions below.

• v.3.1
  • including previews and release candidates.
• v.3.2
  • including previews and release candidates.
• v.5.0
  • including previews and release candidates.

Both "Blazor WebAssembly App" (a.k.a."Client-side Blazor") and "Blazor Server App" (a.k.a."Server-side Blazor") are supoorted.

Step.1 Install the library via NuGet package, like this.

> dotnet add package Toolbelt.Blazor.Gamepad

Step.2 Register "GamepadList" service into the DI container.

If the project is a Blazor Server App or a Blazor WebAssembly App ver.3.1 Preview 4 or earlyer, add the code into the ConfigureService method in the Startup class of your Blazor application.

using Toolbelt.Blazor.Extensions.DependencyInjection; // <- Add this line, and...
...
public class Startup
{
  public void ConfigureServices(IServiceCollection services)
  {
    services.AddGamepadList(); // <- Add this line.
    ...

If the project is a Blazor WebAssembly App ver.3.2 Preview 1 or later (includes .NET 5), add the code into the Main method in the Program class of your Blazor application.

// Program.cs

using Toolbelt.Blazor.Extensions.DependencyInjection; // <- Add this, and...
...
public class Program
{
  public static async Task Main(string[] args)
  {
    var builder = WebAssemblyHostBuilder.CreateDefault(args);
    ...
    builder.Services.AddGamepadList(); // <- Add this line.
    ...

Step.1 Inject the GamepadList service into the component.

@inject Toolbelt.Blazor.Gamepad.GamepadList GamepadList @* <- Add this. *@
...

Step.2 Invoke GetGamepadsAsync() async method to retreive gamepad list, and find a active gamepad object.

After you find it, you can reference gamepad axes and buttons.

Note: GetGamepadsAsync() returns empty list until any gamepad devices are activated. To activate the gamepad, you should do any actions on the gamepad device while the browser's document has focus.

Sample .razor code is here:

@page "/"
@using Toolbelt.Blazor.Gamepad
@using System.Timers
@implements IDisposable
@inject GamepadList GamePadList

@if (this.Gamepad != null) {
  <p>Axes</p>
  <ul>
    @foreach (var ax in this.Gamepad.Axes) {
      <li>@ax.ToString("#,0.0")</li>
    }
  </ul>

  <p>Buttons</p>
  <ul>
    @foreach (var button in this.Gamepad.Buttons) {
      <li>@button.Pressed (@button.Value)</li>
    }
  </ul>
}

@code {

  Gamepad Gamepad;

  Timer Timer = new Timer(200) { Enabled = true };

  protected override void OnInitialized() {
    Timer.Elapsed += Timer_Elapsed;
  }

  async void Timer_Elapsed(object sender, EventArgs args) {
    var gamepads = await GamePadList.GetGamepadsAsync();
    this.Gamepad = gamepads.FirstOrDefault();
    if (this.Gamepads.Any()) 
      await this.InvokeAsync(() => this.StateHasChanged());
  }

  public void Dispose() {
    Timer.Elapsed -= Timer_Elapsed;
    Timer.Dispose();
  }
}

• v.7.0.0
  • BREAKING CHANGE: Support Blazor v.3.1.0 Preview 4 (not compatible with v.3.1.0 Preview 3 or before.)
  • Add support for Blazor Server App ("Server-side Blazor").
• v.6.0.0 - BREAKING CHANGE: Support Blazor v.3.0.0 Preview 9 (not compatible with v.3.0.0 Preview 8 or before.)
• v.5.0.0 - BREAKING CHANGE: Support Blazor v.3.0.0 Preview 6 (not compatible with v.3.0.0 Preview 5 or before.)
• v.4.0.0 - BREAKING CHANGE: Support Blazor v.3.0.0 Preview 4 (not compatible with v.0.9.0 or before.)
• v.3.0.0 - BREAKING CHANGE: Support Blazor v.0.9.0 (not compatible with v.0.8.0 or before.)
• v.2.0.0 - BREAKING CHANGE: Support Blazor v.0.8.0 (not compatible with v.0.7.0 or before.)
• v.1.0.0 - 1st release.

Mozilla Public License Version 2.0