// @nuget: Microsoft.EntityFrameworkCore.SqlServer

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

​

using Microsoft.EntityFrameworkCore;

using System;

using System.Collections.Generic;

using System.Linq;

using Microsoft.Data.SqlClient;

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        using (var context = new EntityContext())

        {

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

            customers.Add(new Customer { Name = "ZZZ Projects", MaximumRequestPerDay = 100 });

            customers.Add(new Customer { Name = "Jonathan Magnan" });

            context.BulkInsert(customers, options => {  

                options.IncludeGraphBeta = true;

                options.IncludeGraphOperationBuilder = builder =>

                {

                    if(builder is Z.BulkOperations.BulkOperation<Customer> bulk)

                    {

                        // will use the value from the entities

                        bulk.ForceValueGeneratedStrategy = Z.EntityFramework.Extensions.ValueGeneratedStrategyType.OnAdd;

                    }

                };

            });

            FiddleHelper.WriteTable("BulkInsert + ValueGeneratedStrategyType.Add will always insert entity values", context.Customers.AsNoTracking());

        }   

    }

    public class EntityContext : DbContext

    {

        public EntityContext() 

        {

        }

​

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

        {

            optionsBuilder.UseSqlServer(new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()));

​

            base.OnConfiguring(optionsBuilder);

        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)

        {

            modelBuilder.Entity<Customer>().Property(x => x.MaximumRequestPerDay).HasDefaultValueSql("50");

​

            base.OnModelCreating(modelBuilder);

        }

        public DbSet<Customer> Customers { get; set; }

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public int MaximumRequestPerDay { get; set; }

    }

}