ASP.NET Core MVC Tutorial

Add a route "blog/{year:int}/{month:int}/{slug}" handled by BlogController.Post(int year, int month, string slug), which returns the three values as text.

Add a Search(string q) action to ProductsController that returns the matching products (name contains q, case-insensitive) to the Index view, or redirects to Index when q is empty.

Add an action Export() that returns all product names as a text file products.txt, one per line.

Change the view so that items with a price above 1000 get the CSS class "premium" (and items in stock still have no class), and show the total number of items at the bottom.

Add an optional section "Styles" to the layout’s <head>, and use it in the home page to add <link rel="stylesheet" href="/css/deals.css" />.

Write a CategoryMenuViewComponent that receives a list of category names from an ICategoryService and renders them as <nav><a>…</a></nav>.

Write an action Filter(ProductFilter filter) for GET /Search/Filter?Category=audio&MinPrice=500&Brands=sony&Brands=jbl where ProductFilter has Category, MinPrice (decimal?) and Brands (List<string>). Return the filter as JSON.

Add a ConfirmEmail field that must match Email, and a form-level error “Registrations are closed on Sundays” when DateTime.Today is a Sunday (shown with asp-validation-summary="ModelOnly").

Write a [MaxWords(n)] attribute that fails when a string has more than n words, and use it on a review Title with n = 8.

Register an IEmailSender implementation called ConsoleEmailSender as transient and inject it into an AccountController whose Welcome(string to) action sends “Welcome to ShopSmart!”.

Create PaymentOptions (Provider required, TimeoutSeconds between 5 and 60) bound from a "Payment" section with startup validation, and inject IOptions<PaymentOptions> into a CheckoutController that returns the provider name.

Add an "Email" section with SmtpHost, Port and From to appsettings.json, bind it to EmailSettings with builder.Services.Configure<EmailSettings>(…), and print Port from IOptions<EmailSettings>.

In a layout, load /lib/site.js in Development and https://cdn.shopsmart.example/site.min.js everywhere else, using the environment tag helper.

Add an appsettings.json Logging section that writes Debug logs for CheckoutService, Warning for Microsoft.AspNetCore, and Information for everything else.

Write a query that returns each category name with its number of products and the average price, ordered by name.

Add a DeleteAsync(int id) method that returns true when a product was deleted.

Use AddDbContextPool instead of AddDbContext for better performance, with a pool size of 128.

Add a DisplayName property (“Name (Category)”) to the scaffolded Product without touching the generated file.

Add an Order entity with Id, OrderNumber (unique, max 20 chars), Total (precision 12,2) and PlacedAt (default SYSUTCDATETIME()), configured in an OrderConfiguration class.

Write a migration by hand that renames the Products column Name to Title without losing data, with a Down method that reverses it.

Add a Details(int id) action and view that show the product name and price, returning 404 for unknown ids.

Add GetByNameAsync(string text) to IProductRepository (name contains text, case-insensitive in the fake) and implement it in both classes.

Write a CheckoutController.Buy(int productId, int quantity) action that calls OrderService and returns View("Confirmation", result) on success or puts result.Error in TempData and redirects to the product page on failure.

Add an AccessDeniedPath "/Account/Denied" and an action that shows “You do not have access to this page.”, then protect an AdminController with [Authorize(Roles = "Admin")].

Seed an admin account at startup: create the Admin role if missing, create admin@shopsmart.example if missing, and add it to the role.

Make every page require a signed-in user by default with a fallback policy, and allow anonymous access to HomeController.Index.

Add a Remove(int id) action to CartController that decreases the quantity, removes the line at zero, and returns the remaining item count.

Add a Download(string name) action that returns an uploaded file only if name matches the pattern of 32 hex characters plus .png, preventing path traversal.

Output-cache a product page /Products/Details/{id} for 2 minutes, varying by the id route value, in a policy named "Product" tagged "products".

Write an IExceptionHandler that handles OperationCanceledException (the user closed the page) by setting status 499 and returning true, so it is not logged as an error.

Write a test that checks Details does not call the repository more than once and returns a ViewResult whose ViewName is null (the default view).

Enable response compression for HTTPS responses with Brotli and Gzip.

Configure Content-Security-Policy-Report-Only instead of the enforced header, with a report-uri of /csp-reports, and add an endpoint that logs posted reports.

Write the PowerShell steps that deploy a new version with zero file-lock errors: create app_offline.htm, copy the publish folder, remove app_offline.htm.

Write a docker-compose.yml that runs ShopSmart (built from the Dockerfile) and SQL Server 2022, passes the connection string to the app, and starts the app after the database is healthy.

Make OrderService reject an order when a product in the cart no longer exists (deleted), returning “Some items are no longer available.”.