Initial commit

Chapter05/MyBlog/Components/Components.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Razor">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+
+  <ItemGroup>
+    <SupportedPlatform Include="browser" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="7.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Data.Models\Data.Models.csproj" />
+  </ItemGroup>
+
+</Project>

Chapter05/MyBlog/Components/Pages/AlertTest.razor

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+@page "/alerttest"
+@using Components.RazorComponents
+<Alert Style="Alert.AlertStyle.Danger">
+    This is a test
+</Alert>
+<Alert Style="Alert.AlertStyle.Success">
+    <ChildContent>
+        This is another test
+    </ChildContent>
+</Alert>
+<Alert Style="Alert.AlertStyle.Success"/>

Chapter05/MyBlog/Components/Pages/Counter.razor

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+@page "/counter"
+
+<PageTitle>Counter</PageTitle>
+
+<h1>Counter</h1>
+
+<p role="status">Current count: @currentCount</p>
+
+<button class="btn btn-primary" @onclick="IncrementCount">Click me</button>
+
+@code {
+    private int currentCount = 0;
+
+    private void IncrementCount()
+    {
+        currentCount++;
+    }
+}

Chapter05/MyBlog/Components/Pages/CounterWithParameterAndEvent.razor

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+@page "/counterwithparameter"
+<h1>Counter</h1>
+<p>Current count: @CurrentCount</p>
+<button class="btn btn-primary" @onclick="IncrementCount">Click me</button>
+@code {
+    [Parameter]
+    public int IncrementAmount { get; set; } = 1;
+    [Parameter]
+    public int CurrentCount { get; set; } = 0;
+    //private void IncrementCount()
+    //{
+    //    CurrentCount+=IncrementAmount;
+    //}
+
+    [Parameter]
+    public EventCallback<int> CurrentCountChanged { get; set; }
+    private void IncrementCount()
+    {
+        CurrentCount += IncrementAmount;
+        CurrentCountChanged.InvokeAsync(CurrentCount);
+    }
+}

Chapter05/MyBlog/Components/Pages/ErrorBoundaryDemo/ComponentWithError.razor

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+<h3>ComponentWithError</h3>
+
+
+<button @onclick="@(()=>{ throw new Exception("This is an error");})">Throw error</button>

Chapter05/MyBlog/Components/Pages/ErrorBoundaryDemo/CustomErrorBoundaryDemo.razor

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+@page "/customerrorboundary"
+<ErrorBoundary>
+    <ChildContent>
+		<ComponentWithError />
+	</ChildContent>
+	<ErrorContent>
+		<h1 style="color: red;">Oops... something broke</h1>
+	</ErrorContent>
+</ErrorBoundary>

Chapter05/MyBlog/Components/Pages/ErrorBoundaryDemo/ErrorBoundaryDemo.razor

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+@page "/errorboundary"
+<ErrorBoundary>
+   <ComponentWithError />
+</ErrorBoundary>

Chapter05/MyBlog/Components/Pages/ErrorBoundaryTest.razor

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+@page "/errorboundarytest"
+<ErrorBoundary Context=ex>
+     <ChildContent>
+        <p>@(1/zero)</p>       
+    </ChildContent>
+    <ErrorContent>
+       An error occured
+       @ex.Message
+    </ErrorContent>
+</ErrorBoundary>
+@code {
+    int zero = 0;
+}

Chapter05/MyBlog/Components/Pages/Index.razor

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+@page "/"
+@using Data.Models.Interfaces
+@using Data.Models
+@inject IBlogApi _api
+
+<ul>
+    <Virtualize ItemsProvider="LoadPosts" Context="p">
+        <li><a href="/Post/@p.Id">@p.Title</a></li>
+    </Virtualize>
+</ul>
+
+
+
+@code {
+  
+    public int totalBlogposts { get; set; }
+    private async ValueTask<ItemsProviderResult<BlogPost>> LoadPosts(ItemsProviderRequest request)
+    {
+        if (totalBlogposts == 0)
+        {
+            totalBlogposts = await _api.GetBlogPostCountAsync();
+        }
+        var numblogposts = Math.Min(request.Count, totalBlogposts - request.StartIndex);
+        var blogposts = await _api.GetBlogPostsAsync(numblogposts, request.StartIndex);
+        return new ItemsProviderResult<BlogPost>(blogposts, totalBlogposts);
+    }
+
+
+
+}

Chapter05/MyBlog/Components/Pages/ParentCounter.razor

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+@page "/parentcounter"
+<CounterWithParameterAndEvent IncrementAmount="@incrementamount" @bind-CurrentCount="currentcount"/>
+The current count is: @currentcount
+@code {
+    int incrementamount = 10;
+    int currentcount = 0;
+
+   
+
+}

Chapter05/MyBlog/Components/Pages/Post.razor

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+@page "/post/{BlogPostId}"
+@inject IBlogApi _api
+@inject NavigationManager _navman
+@if (BlogPost != null)
+{
+    <PageTitle>@BlogPost.Title</PageTitle>
+    <HeadContent>
+    <meta property="og:title" content="@BlogPost.Title" />
+    <meta property="og:description" content="@(new string(BlogPost.Text.Take(100).ToArray()))" />
+    <meta property="og:image" content="@($"{_navman.BaseUri}/pathtoanimage.png")" />
+    <meta property="og:url" content="@_navman.Uri" />
+    <meta name="twitter:card" content="@(new string(BlogPost.Text.Take(100).ToArray()))" />
+    </HeadContent>
+
+    <h2>@BlogPost.Title</h2>
+    @((MarkupString)BlogPost.Text)
+}
+
+@code {
+    [Parameter]
+    public string BlogPostId { get; set; }
+
+    public BlogPost? BlogPost { get; set; }
+    protected async override Task OnParametersSetAsync()
+    {
+        BlogPost = await _api.GetBlogPostAsync(BlogPostId);
+        await base.OnParametersSetAsync();
+    }
+
+}

Chapter05/MyBlog/Components/Pages/SetFocus.razor

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+@page "/setfocus"
+
+<input @ref="textInput" />
+<button @onclick="() => textInput.FocusAsync()">Set focus</button>
+
+@code {
+    ElementReference textInput;
+}

Chapter05/MyBlog/Components/RazorComponents/Alert.razor

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+<div class="@($"alert alert-{Style.ToString().ToLower()}")" role="alert">
+    @ChildContent
+</div>
+@code{
+    [Parameter]
+    public RenderFragment ChildContent { get; set; }      =@<b>This is a default value</b>;
+    [Parameter]
+    public AlertStyle Style { get; set; }
+    public enum AlertStyle
+    {
+        Primary,
+        Secondary,
+        Success,
+        Danger,
+        Warning,
+        Info,
+        Light,
+        Dark
+    }
+}

Chapter05/MyBlog/Components/Shared/MainLayout.razor

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

Chapter05/MyBlog/Components/Shared/MainLayout.razor.css

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+.page {
+    position: relative;
+    display: flex;
+    flex-direction: column;
+}
+
+main {
+    flex: 1;
+}
+
+.sidebar {
+    background-image: linear-gradient(180deg, rgb(5, 39, 103) 0%, #3a0647 70%);
+}
+
+.top-row {
+    background-color: #f7f7f7;
+    border-bottom: 1px solid #d6d5d5;
+    justify-content: flex-end;
+    height: 3.5rem;
+    display: flex;
+    align-items: center;
+}
+
+    .top-row ::deep a, .top-row ::deep .btn-link {
+        white-space: nowrap;
+        margin-left: 1.5rem;
+        text-decoration: none;
+    }
+
+    .top-row ::deep a:hover, .top-row ::deep .btn-link:hover {
+        text-decoration: underline;
+    }
+
+    .top-row ::deep a:first-child {
+        overflow: hidden;
+        text-overflow: ellipsis;
+    }
+
+@media (max-width: 640.98px) {
+    .top-row:not(.auth) {
+        display: none;
+    }
+
+    .top-row.auth {
+        justify-content: space-between;
+    }
+
+    .top-row ::deep a, .top-row ::deep .btn-link {
+        margin-left: 0;
+    }
+}
+
+@media (min-width: 641px) {
+    .page {
+        flex-direction: row;
+    }
+
+    .sidebar {
+        width: 250px;
+        height: 100vh;
+        position: sticky;
+        top: 0;
+    }
+
+    .top-row {
+        position: sticky;
+        top: 0;
+        z-index: 1;
+    }
+
+    .top-row.auth ::deep a:first-child {
+        flex: 1;
+        text-align: right;
+        width: 0;
+    }
+
+    .top-row, article {
+        padding-left: 2rem !important;
+        padding-right: 1.5rem !important;
+    }
+}

Chapter05/MyBlog/Components/Shared/NavMenu.razor

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+<div class="top-row ps-3 navbar navbar-dark">
+    <div class="container-fluid">
+        <a class="navbar-brand" href="">BlazorWebAssembly</a>
+        <button title="Navigation menu" class="navbar-toggler" @onclick="ToggleNavMenu">
+            <span class="navbar-toggler-icon"></span>
+        </button>
+    </div>
+</div>
+
+<div class="@NavMenuCssClass nav-scrollable" @onclick="ToggleNavMenu">
+    <nav class="flex-column">
+        <div class="nav-item px-3">
+            <NavLink class="nav-link" href="" Match="NavLinkMatch.All">
+                <span class="oi oi-home" aria-hidden="true"></span> Home
+            </NavLink>
+        </div>
+        <div class="nav-item px-3">
+            <NavLink class="nav-link" href="counter">
+                <span class="oi oi-plus" aria-hidden="true"></span> Counter
+            </NavLink>
+        </div>
+        <div class="nav-item px-3">
+            <NavLink class="nav-link" href="fetchdata">
+                <span class="oi oi-list-rich" aria-hidden="true"></span> Fetch data
+            </NavLink>
+        </div>
+    </nav>
+</div>
+
+@code {
+    private bool collapseNavMenu = true;
+
+    private string? NavMenuCssClass => collapseNavMenu ? "collapse" : null;
+
+    private void ToggleNavMenu()
+    {
+        collapseNavMenu = !collapseNavMenu;
+    }
+}

Chapter05/MyBlog/Components/Shared/NavMenu.razor.css

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+.navbar-toggler {
+    background-color: rgba(255, 255, 255, 0.1);
+}
+
+.top-row {
+    height: 3.5rem;
+    background-color: rgba(0,0,0,0.4);
+}
+
+.navbar-brand {
+    font-size: 1.1rem;
+}
+
+.oi {
+    width: 2rem;
+    font-size: 1.1rem;
+    vertical-align: text-top;
+    top: -2px;
+}
+
+.nav-item {
+    font-size: 0.9rem;
+    padding-bottom: 0.5rem;
+}
+
+    .nav-item:first-of-type {
+        padding-top: 1rem;
+    }
+
+    .nav-item:last-of-type {
+        padding-bottom: 1rem;
+    }
+
+    .nav-item ::deep a {
+        color: #d7d7d7;
+        border-radius: 4px;
+        height: 3rem;
+        display: flex;
+        align-items: center;
+        line-height: 3rem;
+    }
+
+.nav-item ::deep a.active {
+    background-color: rgba(255,255,255,0.25);
+    color: white;
+}
+
+.nav-item ::deep a:hover {
+    background-color: rgba(255,255,255,0.1);
+    color: white;
+}
+
+@media (min-width: 641px) {
+    .navbar-toggler {
+        display: none;
+    }
+
+    .collapse {
+        /* Never collapse the sidebar for wide screens */
+        display: block;
+    }
+    
+    .nav-scrollable {
+        /* Allow sidebar to scroll for tall menus */
+        height: calc(100vh - 3.5rem);
+        overflow-y: auto;
+    }
+}

Chapter05/MyBlog/Components/Shared/SurveyPrompt.razor

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+<div class="alert alert-secondary mt-4">
+    <span class="oi oi-pencil me-2" aria-hidden="true"></span>
+    <strong>@Title</strong>
+
+    <span class="text-nowrap">
+        Please take our
+        <a target="_blank" class="font-weight-bold link-dark" href="https://go.microsoft.com/fwlink/?linkid=2186157">brief survey</a>
+    </span>
+    and tell us what you think.
+</div>
+
+@code {
+    // Demonstrates how a parent component can supply parameters
+    [Parameter]
+    public string? Title { get; set; }
+}

Chapter05/MyBlog/Components/_Imports.razor

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+@using System.Net.Http
+@using Microsoft.AspNetCore.Authorization
+@using Microsoft.AspNetCore.Components.Forms
+@using Microsoft.AspNetCore.Components.Routing
+@using Microsoft.AspNetCore.Components.Web
+@using Microsoft.AspNetCore.Components.Web.Virtualization
+@using Microsoft.JSInterop
+@using Components.Pages
+@using Components.Shared
+@using Data.Models.Interfaces
+@using Data.Models

Chapter05/MyBlog/Components/wwwroot/exampleJsInterop.js

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+// This is a JavaScript module that is loaded on demand. It can export any number of
+// functions, and may import other JavaScript modules if required.
+
+export function showPrompt(message) {
+  return prompt(message, 'Type anything here');
+}