How to build a restful fire with asp.net core, c# for real world applications

In the current digital environment, the demand for smooth data exchange between applications is higher than before. For Startups, companies, and product -based teamsBuilding an efficient and measurable fire cannot be negotiated. That’s where a API RESTFUL with Asp.net core, c# play.

This guide guides you through making A ASP.NET CORE WEB API REAL WORLD use The core of the entity frameworkStructured around Practical Examples: A Library Inventory Management System.

Whether you modernize the inheritance system or build a microser service from the start, this API architecture is a strong basis for your backend service.

Why choose Asp.net Core and C# for restful fire?

Asp.net Core is an open-source work framework, Microsoft’s high performance which is optimized to build Cloud -based application and company level.

When combined with reliability and type of type safety C#it becomes a powerful tool to build Calm fire which is safe, can be discovered, and ready for production.

Use Case: Library Inventory API

Say your organization needs a backend service to manage library books. This is what API needs to support:

• 📘 Get Book Details with ID

• ✏️ Update book information

• ❌ Delete books from the collection

We will go through the way Build this restful fire on C# use ASP.NET CORE WEB API And The core of the entity framework for database access.

Step 1: Create the API API Core Asp.net project

Open your terminal and run:

party

Copyedit

New Dotnet Webapi -n Libryapi
Libraryapi CD

This command is a clean web fire project scaffolding ready for implementation.

Step 2: Determine the Data Model

Create a folder named model and add books.cs:

CSHARP

Copyedit

namespace libraryapi.models
{
public class book
{
Public int id {get; arrange; }
Public String Title {Get; arrange; }
Public String Author {get; arrange; }
Public String ISBN {get; arrange; }
Public int publicationyear {get; arrange; }
}
}

This model represents the structure of the book entity in our API.

Step 3: Integration of the Entity Framework

Install the EF core package:

party

Copyedit

Dotnet Add Microsoft.entityFrameworkcore.sqlserver package
Dotnet Add Microsoft.entityFrameworkcore.tools package
Dotnet Add Microsoft.entityFrameworkcore.design package

Make LibraryDBCONTEXT.CS in a Data folder:

CSHARP

Copyedit

using libraryapi.models;
using Microsoft.entityFrameworkcore;

namespace libraryapi.data
{
LIBRARYDBCONTEXT Public Class: DBCONTEXT
{
Public LibraryDbcontext (DBContexToptions Option): base (option) {}
Public dbset Book {get; arrange; }
}
}

Step 4: Configure Database Connection

At appsettings.json, add:

json

Copyedit

“Connectionstrings”: {{
“DefaultConnection”: “Server = your_server; database = librarydb; user id = your_user; password = your_password; trustservercritate = true;”
}

Then update the program.cs:

CSHARP

Copyedit

builder.services.adddbcontext (Options =>
options.usesqlserver (builder.configuration.getconnestring (“Defaultconnection”))));

Step 5: Apply Migration

Produce a database scheme:

party

Copyedit

EF Dotnet Migration Add Initialcreate
Dotnet EF database update

This creates a book table in your SQL Server database.

Step 6: Make a controller

Add a new controller named Bookscontroller.cs in the control folder:

CSHARP

Copyedit

[ApiController]
[Route(“api/[controller]”)]
Control of Public Class Books: Controllerbase
{
Private Readonly LibraryDBCONTEXT _CONTEXT;

Public BookScontroller (LibraryDbcontext Context)
{
_CONTEXT = context;
}

[HttpGet]
ASYNC Public Duties >> Getbooks () => Waiting for _CONTEXT.BOOKS.TOLISTASYNC ();

[HttpGet(“{id}”)]
ASYNC Public Duties > Getbook (int id)
{
Var Book = Waiting for _Context.Books.findasync (ID);
Return Book == NULL? Notfound (): book;
}

[HttpPost]
ASYNC Public Duties > Post Book (Book)
{
_CONTEXT.BOOOKS.ADD (BOOK);
waiting for _context.savechangesasync ();
return createtacaction (nameoof (getbook), new {id = book.id}, book);
}

[HttpPut(“{id}”)]
ASYNC Public Duties PUTBOOK (INT ID, BOOK)
{
if (id! = book.id) Badrequest () Return Return ();
_CONTEXT.ENTRY (BOOK). State = Entitystate.modified;

try {await _context.savechangesasync (); }
Catch (DBUPDATECONCURENCYException)
{
if (! _context.Books.any (E => E.id == ID)) Return notfound ();
throw;
}

Return Noconcent ();
}

[HttpDelete(“{id}”)]
ASYNC Public Duties Deletebook (int id)
{
Var Book = Waiting for _Context.Books.findasync (ID);
if (Book == null) Return Notfound ();

_CONTEXT.Books.Remove (Book);
waiting for _context.savechangesasync ();
Return Noconcent ();
}
}

Step 7: Restful Fire Test

You can interact with your fire using:

• Postman (Send http requests to test the end point)

Best Practice for C# API preparing for production

To make your C# API development can be relied upon and safe, consider implementing these practices:

Input validation

Use [Required] and the annotation of other data in your model to enforce the rules.

Handling Global Mistakes

Make Middleware to capture and restore the response of structured errors.

Use DTOS

Data transfer objects allow you to only expose what is needed for the client.

Secure fire

Use JWT authentication or OAUTH 2.0 to protect the sensitive end point.

Fire version

Support long -term evolution with the end point version (/API/V1/Book).

ASYNC Database Access

Always use ASYNC/wait for EF Core for better scalability.

Logging and monitoring

Add a structured log using a tool like Serilog or Application insight.

Unit testing and integration

Use Xunit, MOQAnd Test server For trust in placement.

Conclusion

Developing a API RESTFUL with Asp.net core, c# Offering the performance, flexibility, and security needed for real world software systems.

With an entity framework core managing your data access and asp.net core handling http requests efficiently, this approach is ideal for businesses that build micro, cellular, or company platform services.

Additional resources: