// Entity Framework Extensions

// Doc: https://entityframework-extensions.net/bulk-update

​

// @nuget: Microsoft.EntityFrameworkCore.SqlServer

// @nuget: Z.EntityFramework.Extensions.EFCore

​

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Microsoft.Data.SqlClient;

using Microsoft.EntityFrameworkCore;

​

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        // SEED

        using (var context = new EntityContext())

        {

            List<Customer>  list = new List<Customer>();

            for(int i = 0; i < 10; i++)

            {

                list.Add(new Customer() {  Name = "Customer_" + i});

            }   

            context.BulkInsert(list);

        }

        // BulkUpdate

        using (var context = new EntityContext())

        {

            var list = context.Customers.ToList();

            list.ForEach(x => x.Name += "_Updated");

            StringBuilder log = new StringBuilder();

            context.BulkUpdate(list, options => {

                options.Log = s => log.AppendLine(s);

            });

            Console.Write(log.ToString());

        }   

    }

​

    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 Name { get; set; }

    }

}