C# Tech Workshop 3

Today we are going about a few design patterns.

Links

• c# Design Paterns

The above you can go though on your own pace and take not as these are guidelines. The merely assist you in the right direction and the approach and be taken for any given language IF it allows it.

NB!!! Take the singleton approach

Exercise

Creating an api instance with a service layer where we are going to inject our in-memory storage

Steps

Follow the steps if you want to create your own project. Use an existing solution for this Create a new project

dotnet new webapi -n InMemoryEFCoreProject

Add the following packages to the project

dotnet add package Microsoft.EntityFrameworkCore.InMemory
dotnet add package Microsoft.EntityFrameworkCore.Design

Copy over the the following files.

• Controller.ProductController.cs
• Data.ApplicationDbContext.cs
• Controller.Product.cs

Ensure that the Program.cs file has the following

using Microsoft.EntityFrameworkCore;
using InMemoryEFCoreProject.Data;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllers();
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseInMemoryDatabase("InMemoryDb"));

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseDeveloperExceptionPage();
}

app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();

app.Run();