To create a .NET Core Web API microservice project using Vertical Slice Architecture, with Product and Customer entities (where a Customer has a list of Products), and set up Entity Framework Core with an in-memory database, follow these steps:
Step 1: Create the .NET Core Web API Project
Open a terminal or command prompt. Run the following command to create a new .NET Core Web API project:
dotnet new webapi -n ProductCustomerMicroservice
cd ProductCustomerMicroserviceStep 2: Add Required NuGet Packages
Add the following NuGet packages to your project:
dotnet add package Microsoft.EntityFrameworkCore
dotnet add package Microsoft.EntityFrameworkCore.InMemoProject Folder Structure
Step 3: Define the Entity Classes
Create the Product and Customer entity classes.
Create a folder named Entities. Add the Product class:
Add the Customer class:
Step 4: Set Up Entity Framework Core
Create a folder named Data. Add a DbContext class:
Register the DbContext in Program.cs😀
Step 5: Implement Vertical Slice Architecture
Vertical Slice Architecture organizes code around features rather than layers. Each feature will have its own folder containing all the necessary files (e.g., handlers, requests, responses).
Create a folder named
Features.Inside
Features, create subfolders for each feature, such asCustomersandProducts.
Step 6: Implement CRUD Operations
Customer Feature
Create a folder
Features/Customers.Add a
CreateCustomerfeature:Create a
CreateCustomerCommand.cs
Create a
CreateCustomerHandler.cs
Add an Endpoint’s
Add a
GetCustomerByIdfeature:Create a
GetCustomerByIdQuery.cs
Create a
GetCustomerByIdHandler.cs😀
Add an
Endpoint's
Step 7: Test the API
Run the application:
dotnet runUse tools like Postman or Swagger UI to test the endpoints:
Create a customer:
POST /api/customersGet a customer by ID:
GET /api/customers/{id}
Step 8: Repeat for Product Feature
Follow a similar pattern to implement CRUD operations for the Product entity.
This setup provides a clean, maintainable structure using Vertical Slice Architecture and Entity Framework Core with an in-memory database. You can expand it further by adding more features and validation.
For a closer look at the code and to explore the full project, visit our GitHub repository!