4. Creating Views

• Develop Razor views to display data to the user.
• Use Razor syntax to embed server-side logic within HTML.

5. Implementing Models

• Define models to represent the application’s data.
• Use EF Core to interact with the database and perform CRUD operations.

6. Setting Up Routing

• Configure routes in the Startup class or use attribute routing.
• Define URL patterns that map to specific controller actions.

7. Managing State

• Use session, cookies, and TempData to manage state across requests.
• Implement caching to improve performance and reduce database load.

8. Implementing Authentication and Authorization

• Set up ASP.NET Core Identity for user authentication.
• Define roles and policies for authorization.

9. Adding Client-Side Functionality

• Integrate modern front-end frameworks like Angular, React, or Vue.js.
• Use JavaScript, jQuery, and AJAX to enhance user interactions.

10. Testing

• Write unit tests for controllers, services, and models using xUnit or NUnit.
• Implement integration tests to verify the overall functionality of the application.

11. Building and Deploying

• Build the application for production using the .NET CLI or Visual Studio.
• Deploy the application to a hosting service, cloud platform, or on-premises server.

8. Advanced ASP.NET Features

Middleware

Middleware components in ASP.NET Core can be used to customize the request processing pipeline. Middleware can perform tasks such as authentication, logging, and error handling.

Dependency Injection

ASP.NET Core’s built-in dependency injection system makes it easy to manage dependencies. Services can be registered with different lifetimes, such as singleton, scoped, or transient.

Configuration

The configuration system in ASPNET Core is highly flexible. It can read settings from JSON files, environment variables, command-line arguments, and more. Configuration values can be injected into services and controllers using the options pattern.

Logging

ASPNET Core includes a comprehensive logging framework that supports various logging providers, such as Console, Debug, EventSource, and third-party providers like Serilog and NLog. Logging helps track application behavior and diagnose issues.

Health Checks

Health checks in ASP.NET Core provide a way to monitor the health of your application and its dependencies. Health checks can be used to check the status of databases, external services, and other critical components.

Localization and Globalization

ASPNET Core supports localization and globalization, allowing you to create applications that cater to a global audience. Localization involves translating the application’s content into different languages, while globalization ensures the application handles various cultural formats correctly.

Real-Time Communication with SignalR

SignalR is a library for adding real-time web functionality to applications. It enables server-side code to push content to clients instantly. SignalR supports WebSockets, Server-Sent Events, and Long Polling.

9. Testing and Debugging in ASPNET

Unit Testing

Unit testing in ASPNET Core involves testing individual components, such as controllers, services, and models, in isolation. xUnit and NUnit are popular frameworks for writing unit tests in .NET.

Integration Testing

Integration testing verifies the overall functionality of the application by testing how different components work together. ASP.NET Core provides tools to create integration tests that simulate HTTP requests and verify responses.

End-to-End Testing

End-to-end (E2E) testing involves testing the entire application from the user’s perspective. Tools like Selenium and Cypress can be used to automate E2E tests.

Debugging

Visual Studio and Visual Studio Code provide powerful debugging tools for ASP.NET Core applications. Breakpoints, watch windows, and step-through debugging help identify and fix issues in the code.

Logging

Effective logging is crucial for diagnosing issues in production environments. ASP.NET Core’s logging framework allows you to log messages at various levels (e.g., Information, Warning, Error) and write them to different targets.

10. Best Practices for ASPNET Development

Follow the SOLID Principles

Adhering to the SOLID principles (Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion) ensures that your code is maintainable, scalable, and testable.

Use Dependency Injection

Leverage ASP.NET Core’s built-in dependency injection system to manage dependencies and promote loose coupling. Register services with appropriate lifetimes and inject them where needed.

Keep Controllers Lean

Controllers should focus on handling user input and delegating business logic to services. Avoid putting complex logic in controllers to keep them lean and maintainable.

Implement Error Handling

Implement comprehensive error handling to catch and log exceptions. Use middleware to handle global errors and return user-friendly error messages.

Optimize Performance

Optimize the performance of your ASPNET Core applications by using caching, minimizing database queries, and leveraging asynchronous programming. Regularly profile your application to identify and address performance bottlenecks.

Secure Your Application

Follow security best practices to protect your ASPNET Core applications. Use HTTPS, validate user input, implement authentication and authorization, and regularly update dependencies to address security vulnerabilities.

Write Tests

Write unit, integration, and end-to-end tests to verify the functionality of your application. Automated testing helps catch issues early and ensures that new changes do not break existing functionality.

Maintain Documentation

Maintain comprehensive documentation for your ASP.NET Core applications. Document APIs, configuration settings, deployment procedures, and common troubleshooting steps to assist other developers and stakeholders.

11. ASPNET Ecosystem

The ASPNET ecosystem includes a rich set of tools, libraries, and frameworks that enhance the development experience and extend the functionality of ASP.NET Core applications.

Entity Framework Core

Entity Framework Core (EF Core) is the ORM used in ASP.NET Core to interact with databases. It provides a high-level API for performing CRUD operations and supports various database providers.

IdentityServer4

IdentityServer4 is an open-source framework for implementing authentication and authorization in ASP.NET Core applications. It supports OAuth 2.0 and OpenID Connect protocols.

Blazor

Blazor is a framework for building interactive web applications using C# instead of JavaScript. Blazor WebAssembly allows you to run C# code directly in the browser, while Blazor Server enables server-side rendering.

AutoMapper

AutoMapper is a library that simplifies object-to-object mapping, reducing the amount of boilerplate code required for transforming data between different layers of an application.

Hangfire

Hangfire is a library for scheduling and executing background jobs in ASP.NET Core applications. It provides a simple way to run tasks in the background, such as sending emails or processing data.

Serilog

Serilog is a structured logging library for .NET that allows developers to log messages in a structured format, making it easier to analyze and search logs.

Swagger

Swagger, also known as OpenAPI, is a tool for documenting and testing RESTful APIs. ASP.NET Core integrates with Swagger to generate interactive API documentation.