Getting Started with .NET Core: A Comprehensive Guide for Beginners

Now Let’s learn the MVC architecture, Dependency Injection, Repository pattern, Asynchronous Programming, Entity Framework. We will learn all these things with the practical implementation so, it will be easy for us to learn. 

We will make an Employee registration Web App by using the .Net Core MVC basically it is our simple CURD operations.  

Step 1. Open the Visual Studio and select Create a new Project. 

Step 2. Then search for ASP .Net Core Web App (Model-View-Controller) with C#. Then Next 

Step 3. Now give the name of the project and browse the location then click Next  

Step 4. Select the framework in this project we will select the 8.0. Then click on create

Step 5. At the top you can se a View option click on that and then Solution Explorer  

Now, First thing we need to do is to install the all required Packages  

Step 6. Install all required Packages  

Microsoft.EntityFrameworkCore.Design 

Microsoft.EntityFrameworkCore 

Microsoft.EntityFrameworkCore.SqlServer. 

Microsoft.EntityFrameworkCore.Tools. 

Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation  — it is for getting code updates just by refresh, after using it we did not need to restart the project again and again after any code update. 

Go to Tool => NuGet Package Manager => Manage NuGet Package Solution  

Search for all the required packages and install them according to your project version.  

In same way install all the packages.   

You can check all these installed packages by double click on the project name Under the solution Explorer   

Step 7. Set Up the connection string  

Goto solution explorer and select the appSetting.json  

Write your connection string  

Now configure this connection string in Program.cs file 

Now Add new ApplicationDbContext which is responsible for our database connection  

Right Click on project name under solution Explorer and add class named as ApplicationDbContext Now add all these thing in Program.cs file 

Build Solution  

To add your connection Open the Package Manger Console and then run commad  

Add-Migration InitialLoad 

Then Update-Database 

And now your database connection is ready. 

You can check this connection By Sql Server Object Explorer  

Click on View => Sql Server Object Explorer; find you server name which you have added in connection string and then find the database.  

Step 8. Now add Model; Right click on Model folder then Add Class give the name of the class 

Add the properties in the class 

Add this class in ApplicationDbContext class  

Then in package manager Add-Migration Employee 

Update-Database 

After this step you employee table will be add in your database you can check it in you SQL Server Object Explorer. 

Step 9. Now we add repository for making the methods, Which contains functionality of Create Update Delete and Read Data from Database. 

Right click on Project and then Add New folder named as Repository 

Now Right click on Repository Folder and then add Interface Named as IEmployeeRepository here we define our methods. 

Step 10 : Now add the EmployeeRepository class in Repository folder 

Implement this in EmployeeRepository Folder 

Now Add this IEmployeeRepository and EmployeeRepository in Program.cs file for DI 

// Register the EmployeeRepository and IEmployeeRepository for dependency injection builder.Services.AddScoped<IEmployeeRepositroy, EmployeeRepository>(); 

Step 11. Now add the EmployeeController in Controller Folder 

Now in controller we can add further functionality  

Ctor is the short way to add constructor  

In this way Inject the dependency, and add the other functionality 

Tip: Use Try Catch block for exception handling. 

Step 12. Now Create the View  

Right click under the Index Action and click on add view  

In this view we write the html code to display our employee list  

In Same Add View for the Create and details  

Same for edit but the details comes automatically for the selected employee

View for Delete 

Now Add the Employee button in Navbar  

Go to View-Shared-> _Layout.cshtml  

Here’s the flow of the ASP.NET Core MVC lifecycle. 

Flow: 

Request is routed to the appropriate Controller. 

The Controller processes the request, interacts with the Model, and returns a View or ActionResult to the client. 

Here are some .NET Core programming best practices to help you develop robust, efficient, and maintainable applications:

Select the correct version 

• Always use the latest stable version of .NET Core to benefit from performance improvements and security updates

Use asynchronous programming

• Use asynchronous APIs to improve performance. This allows your application to handle multiple requests simultaneously without blocking threads.

Cache aggressively

• Implement caching to reduce server load and improve response time. Use caching for frequently used data.

Optimize data access

• Use efficient data access patterns and optimize database queries. Consider using Entity Framework Core for database operations.

Enable compression

• Enable compression for your HTTP responses to reduce the size of data transmitted over the network.

Use Dependency Injection

• Using dependency injection to manage dependencies and improve testability. .NET Core has built-in support for dependency injection.

Implement logging

• Use a logging framework to capture important information about your application’s behavior. This helps in debugging and monitoring.

Follow coding standards

• Follow coding standards and best practices to ensure code quality and maintainability.

Test automation

• Implement automated testing to catch bugs early and ensure your code works as expected. Use unit tests, integration tests, and end-to-end tests.

Secure your app

• Follow security best practices and protect your application from common vulnerabilities. Use HTTPS, validate inputs, and manage user authentication and authorization properly.

Profile and Performance Optimization

• Use profiling tools to identify performance bottlenecks and optimize your code. Tools like PerfView can help you analyze your application’s performance.

Conclusion

You’ve made excellent progress through this comprehensive guide, and it’s clear you now have a strong understanding of .NET Core’s core principles and development tools. From building your first application to mastering key concepts like Dependency Injection and Entity Framework, you’re now in a great position to tackle larger, more complex projects. As you continue to explore .NET Core and its ecosystem, remember that the tools available are vast, and mastering them will help you become proficient in ASP.NET Core development services. Take time to explore further topics such as cloud computing, API design, and performance optimization as part of your ongoing journey into .NET Core development services.