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Add Blazor WASM .NET on Web Workers sample app (#635)
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Lines changed: 882 additions & 1 deletion

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‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/App.razor‎

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<Router AppAssembly="@typeof(App).Assembly" NotFoundPage="typeof(Pages.NotFound)">
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<Found Context="routeData">
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<RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
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<FocusOnNavigate RouteData="@routeData" Selector="h1" />
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</Found>
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</Router>

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/BlazorWasm.csproj‎

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<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
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<PropertyGroup>
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<TargetFramework>net10.0</TargetFramework>
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<Nullable>enable</Nullable>
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<ImplicitUsings>enable</ImplicitUsings>
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<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="10.0.0" />
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<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="10.0.0" PrivateAssets="all" />
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<PackageReference Include="QRCoder" Version="1.7.0" />
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</ItemGroup>
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<ItemGroup>
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<SupportedPlatform Include="browser" />
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</ItemGroup>
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</Project>

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/BlazorWasm.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 18
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VisualStudioVersion = 18.3.11218.70 d18.3
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BlazorWasm", "BlazorWasm.csproj", "{C130AD78-5381-25F8-31BC-8D6ABC8C689E}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{C130AD78-5381-25F8-31BC-8D6ABC8C689E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{C130AD78-5381-25F8-31BC-8D6ABC8C689E}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{C130AD78-5381-25F8-31BC-8D6ABC8C689E}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{C130AD78-5381-25F8-31BC-8D6ABC8C689E}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {30A17113-5A5F-430E-BF98-304E5F74DFBE}
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EndGlobalSection
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EndGlobal

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/Clients/Client.razor‎

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// dummy file to let blazor handle Client.razor.js file loading

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/Clients/Client.razor.cs‎

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// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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using System.Runtime.InteropServices.JavaScript;
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using System.Runtime.Versioning;
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[SupportedOSPlatform("browser")]
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public partial class Client
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{
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private static bool workerDotnetStarted;
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public static async Task InitClient()
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{
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if (workerDotnetStarted)
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{
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return;
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}
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workerDotnetStarted = true;
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await JSHost.ImportAsync(
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moduleName: nameof(Client),
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moduleUrl: $"../Clients/Client.razor.js");
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}
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[JSImport("generateQR", nameof(Client))]
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public static partial Task<string> GenerateQR(string text, int size);
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}

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/Clients/Client.razor.js‎

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// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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const pendingRequests = {};
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let pendingRequestId = 0;
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const dotnetWorker = new Worker('./Workers/QRGenerator.razor.js', { type: "module" });
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dotnetWorker.addEventListener('message', async function (e) {
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switch (e.data.command) {
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case "response":
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if (!e.data.requestId) {
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console.error("No requestId in response from worker");
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}
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const request = pendingRequests[e.data.requestId];
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delete pendingRequests[e.data.requestId];
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if (e.data.error) {
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request.reject(new Error(e.data.error));
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}
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request.resolve(e.data.result);
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break;
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default:
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console.log('Worker said: ', e.data);
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break;
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}
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}, false);
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function sendRequestToWorker(request) {
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pendingRequestId++;
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const promise = new Promise((resolve, reject) => {
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pendingRequests[pendingRequestId] = { resolve, reject };
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});
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dotnetWorker.postMessage({
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...request,
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requestId: pendingRequestId
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});
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return promise;
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}
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export async function generateQR(text, size) {
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const response = await sendRequestToWorker({
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command: "generateQR",
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text: text,
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size: size
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});
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const blob = new Blob([response], { type: 'image/png' });
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return URL.createObjectURL(blob);
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}

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/Components/Popup.razor‎

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@namespace Components
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@if (this.isVisible)
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{
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<div class="modal d-block">
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<div class="modal-dialog">
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<div class="modal-content">
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<div class="modal-header">
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<h5 class="modal-title">@title</h5>
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<button type="button" class="close" @onclick="@Hide" data-dismiss="modal" aria-label="Close">
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<span aria-hidden="true">×</span>
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</button>
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</div>
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<div class="modal-body">
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<p for="message">@message</p>
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<div class="text-center">
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<button class="btn btn-outline-danger" @onclick="@Hide">Close</button>
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</div>
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</div>
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</div>
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</div>
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</div>
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}

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/Components/Popup.razor.cs‎

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using Microsoft.AspNetCore.Components;
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using System.Runtime.Versioning;
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namespace Components;
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[SupportedOSPlatform("browser")]
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public partial class Popup : ComponentBase
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{
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private string message = string.Empty;
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private string title = string.Empty;
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private bool isVisible;
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public void Show(string title, string message)
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{
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Console.WriteLine($"Popup.Show: {title} - {message}");
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this.title = title;
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this.message = message;
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isVisible = true;
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InvokeAsync(StateHasChanged);
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}
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public void Hide()
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{
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isVisible = false;
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InvokeAsync(StateHasChanged);
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}
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}

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/Layout/MainLayout.razor‎

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@namespace Layout
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@inherits LayoutComponentBase
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<div class="page">
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<div class="sidebar">
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<NavMenu />
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</div>
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<main>
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<div class="top-row px-4">
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<a href="https://learn.microsoft.com/aspnet/core/" target="_blank">About</a>
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</div>
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<article class="content px-4">
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@Body
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</article>
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</main>
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</div>

‎10.0/DotNetOnWebWorkersBlazorWebAssembly/BlazorWasm/Layout/MainLayout.razor.css‎

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.page {
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position: relative;
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display: flex;
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flex-direction: column;
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}
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main {
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flex: 1;
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}
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.sidebar {
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background-image: linear-gradient(180deg, rgb(5, 39, 103) 0%, #3a0647 70%);
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}
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.top-row {
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background-color: #f7f7f7;
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border-bottom: 1px solid #d6d5d5;
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justify-content: flex-end;
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height: 3.5rem;
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display: flex;
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align-items: center;
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}
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.top-row ::deep a, .top-row ::deep .btn-link {
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white-space: nowrap;
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margin-left: 1.5rem;
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text-decoration: none;
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}
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.top-row ::deep a:hover, .top-row ::deep .btn-link:hover {
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text-decoration: underline;
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}
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.top-row ::deep a:first-child {
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overflow: hidden;
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text-overflow: ellipsis;
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}
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@media (max-width: 640.98px) {
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.top-row {
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justify-content: space-between;
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}
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.top-row ::deep a, .top-row ::deep .btn-link {
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margin-left: 0;
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}
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}
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@media (min-width: 641px) {
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.page {
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flex-direction: row;
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}
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.sidebar {
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width: 250px;
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height: 100vh;
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position: sticky;
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top: 0;
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}
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.top-row {
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position: sticky;
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top: 0;
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z-index: 1;
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}
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.top-row.auth ::deep a:first-child {
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flex: 1;
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text-align: right;
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width: 0;
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}
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.top-row, article {
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padding-left: 2rem !important;
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padding-right: 1.5rem !important;
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}
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}

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