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Showing of 62What are the advantages of using ASP.NET Core?
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- Cross-Platform: Runs on Windows, Linux, and macOS.
- High Performance: Lightweight and optimized for performance.
- Modularity: Uses a middleware pipeline that is highly configurable.
- Built-in Dependency Injection: Encourages loosely coupled design.
- Cloud-Ready: Designed to integrate well with modern cloud services.
- Open Source: Active community support and frequent updates.
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What is the purpose of the Startup class?
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The Startup class is central to ASP.NET Core applications. It configures:
- Services: Through the
ConfigureServicesmethod by adding components (e.g., MVC, EF Core, logging) to the DI container. - Middleware Pipeline: Through the
Configuremethod by setting up the request handling pipeline.
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What happens in the ConfigureServices method?
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ConfigureServices is where you register application services with the dependency injection container. This can include framework services (MVC, Razor Pages, Entity Framework) and custom application services.
Example:
public void ConfigureServices(IServiceCollection services)
{
services.AddControllersWithViews();
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
}
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What is the role of the Configure method?
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The Configure method defines the HTTP request pipeline by adding middleware components. The order in which middleware is added is crucial as it determines how HTTP requests are processed.
Example:
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
app.UseDeveloperExceptionPage();
else
app.UseExceptionHandler("/Home/Error");
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
}
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How are application settings configured in ASP.NET Core?
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Settings are typically configured using:
- appsettings.json: The main configuration file.
- Environment-Specific Files: Such as
appsettings.Development.json. - Environment Variables and Command-Line Arguments: Which can override settings.
The configuration system supports hierarchical settings and binding to strongly typed classes via the Options pattern.
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What is the role of the appsettings.json file?
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The appsettings.json file holds configuration data (like connection strings, logging settings, etc.) in a JSON format. It can be supplemented by environment-specific files and overridden by other configuration sources.
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How do you set up environment-specific configurations?
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Create separate configuration files named with the environment suffix (e.g., appsettings.Development.json, appsettings.Production.json). Set the environment by defining the ASPNETCORE_ENVIRONMENT variable. The configuration system automatically loads the appropriate file based on the environment.
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How is logging implemented in ASP.NET Core?
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ASP.NET Core provides a built-in logging API through the ILogger interface. It supports multiple providers (Console, Debug, EventSource) and can be extended with third-party logging frameworks like Serilog or NLog.
Example:
public class HomeController : Controller
{
private readonly ILogger<HomeController> _logger;
public HomeController(ILogger<HomeController> logger)
{
_logger = logger;
}
public IActionResult Index()
{
_logger.LogInformation("Index page requested");
return View();
}
}
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What is the Kestrel web server?
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Kestrel is the default, cross-platform web server for ASP.NET Core. It is designed to be lightweight and high performance. In production, it is often used in combination with a reverse proxy like IIS, Nginx, or Apache for additional security and robustness.
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How does ASP.NET Core support cross-platform development?
What is the Model-View-Controller (MVC) pattern in ASP.NET Core?
What is Razor syntax?
How do you serve static files in an ASP.NET Core application?
What is the purpose of the wwwroot folder?
How do you use the IConfiguration interface?
What is the difference between AddScoped, AddTransient, and AddSingleton?
How does ASP.NET Core differ from the traditional ASP.NET Framework?
What is middleware in ASP.NET Core?
What is dependency injection (DI) in ASP.NET Core?
How does routing work in ASP.NET Core?
How do you handle exceptions in ASP.NET Core?
What are Razor Pages?
How do you create a RESTful API in ASP.NET Core?
What are Tag Helpers in ASP.NET Core?
What are View Components?
What is the difference between View Components and Partial Views?
How does model binding work in ASP.NET Core?
How do you handle form submissions in ASP.NET Core?
What is anti-forgery validation and why is it important?
What are filters in ASP.NET Core?
What is CORS and how do you configure it in ASP.NET Core?
What is SignalR?
How do you implement authentication in ASP.NET Core?
How do you implement authorization in ASP.NET Core?
What are authorization policies?
How do you secure an ASP.NET Core application?
What are Areas in ASP.NET Core MVC?
Why is the order of middleware important in ASP.NET Core?
What is endpoint routing in ASP.NET Core?
How do you create custom middleware in ASP.NET Core?
What is the role of the IApplicationBuilder interface?
What is the purpose of the IWebHost interface?
What is the difference between app.Use() and app.Run() in middleware configuration?
How do you manage service lifetimes (Singleton, Scoped, Transient) in DI?
How do you manage sensitive data in an ASP.NET Core application?
What is the IHostingEnvironment (or IWebHostEnvironment) interface used for?
How do you integrate Entity Framework Core in ASP.NET Core?
How do you manage database migrations with EF Core?
What is the Repository Pattern and why is it used?
How is session state handled in ASP.NET Core?
What is distributed caching and how can it be implemented?
What are Health Checks in ASP.NET Core?
How do you integrate Swagger (OpenAPI) into an ASP.NET Core application?
How do you deploy an ASP.NET Core application?
How do you implement globalization and localization in ASP.NET Core?
What is Blazor and how does it integrate with ASP.NET Core?
What are some of the new features in the latest version of ASP.NET Core?
What is Minimal API in ASP.NET Core 6+?
How do you implement custom model validation in ASP.NET Core?
How do you implement background tasks in ASP.NET Core?
What is gRPC and how can it be used in ASP.NET Core?
How do you implement API versioning in ASP.NET Core Web APIs?
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ASP.NET Core cheatsheet
- ASP.NET Core Fundamentals01
- Project Structure02
- Dependency Injection (DI)03
- Middleware04
- Routing05
- Controllers and Actions06
- Model Validation07
- Filters08
- Configuration09
- Logging10
- Entity Framework Core11
- Authentication & Authorization12
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