EF Extensions - BulkSaveChanges - Description (EFCore)

CSharp · Console

/Program.cs

// Entity Framework Extensions
// Doc: https://entityframework-extensions.net/bulk-savechanges

// @nuget: Microsoft.EntityFrameworkCore.SqlServer
// @nuget: Z.EntityFramework.Extensions.EFCore


using System.Collections.Generic;
using System.Linq;
using Microsoft.Data.SqlClient;
using Microsoft.EntityFrameworkCore;

public class Program
{
	public static void Main()
	{
		using (var context = new EntityContext())
		{
			context.Database.EnsureCreated();
		}
		
		GenerateCustomers();
		
		using (var context = new EntityContext())
		{
			var list = context.Customers.ToList();
			
			FiddleHelper.WriteTable("1 - Customers Before", context.Customers.AsNoTracking());
			
			// Modify "Customer_A"
			// Remove "Customer_B"			
			list.Single(x => x.Code == "Customer_A").Code = "Customer_A_Modified";
			context.Customers.Remove(list.Single(x => x.Code == "Customer_B"));			
			
			// Easy to use
			context.BulkSaveChanges();
			
			FiddleHelper.WriteTable("2 - Customers After", context.Customers.AsNoTracking());
			
			// ADD 200x "Customer_I"
			var listToAdd = new List<Customer>();
			for(int i = 0; i < 200; i++)
			{
				listToAdd.Add(new Customer() { Code = "Customer_" + i });
			}
			context.Customers.AddRange(listToAdd);
			
			// Easy to customize
			context.BulkSaveChanges(options => options.BatchSize = 100);
			
			FiddleHelper.WriteTable("3 - Customers After", context.Customers.AsNoTracking());
		}
	}
	
	public static void GenerateCustomers()
	{
		using (var context = new EntityContext())
		{
			context.Customers.Add(new Customer() { Code = "Customer_A" });
			context.Customers.Add(new Customer() { Code = "Customer_B" });
			
			context.SaveChanges();
		}
	}
	
	public class EntityContext : DbContext
	{
		public EntityContext() 
		{
		}

		protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
		{
			optionsBuilder.UseSqlServer(new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()));

			base.OnConfiguring(optionsBuilder);
		}
		
		public DbSet<Customer> Customers { get; set; }
	}

	public class Customer
	{
		public int CustomerID { get; set; }
		public string Code { get; set; }
	}
}