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Program.cs
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using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using StatePatternEfCore.Data;
using StatePatternEfCore.Domain.Order;
using System;
namespace StatePatternEfCore
{
public static class Program
{
public static void Main()
{
ServiceProvider serviceProvider = ConfigureServices();
var order = new Order("Hat", 2500);
order.State.Confirm();
order.State.Ship("Tehran");
Console.WriteLine($"Order before save to DB: {order}");
// Persist
var db = serviceProvider.GetService<ApplicationDbContext>();
db.Orders.Add(order);
db.SaveChanges();
Order retrievedOrder = db.Orders.Find(1);
Console.WriteLine($"Order retrieved from DB: {retrievedOrder}");
Console.ReadKey();
}
private static ServiceProvider ConfigureServices()
{
var services = new ServiceCollection();
services.AddDbContext<ApplicationDbContext>(opt =>
opt.UseInMemoryDatabase("OrdersDB"));
ServiceProvider serviceProvider = services.BuildServiceProvider();
return serviceProvider;
}
}
}