// Entity Framework Extensions

// Doc: https://entityframework-extensions.net/forcevaluegeneratedstrategy-option

​

// @nuget: Microsoft.EntityFrameworkCore.SqlServer

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

​

using System;

using System.Collections.Generic;

using System.Linq;

using Microsoft.Data.SqlClient;

using Microsoft.EntityFrameworkCore;

using Z.EntityFramework.Extensions;

​

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        using (var context = new EntityContext())

        {

            var customers = new List<Customer>();

            customers.Add(new Customer() { Name = "ZZZ Projects", TokenLimit = 200 });

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

​

            context.BulkInsert(customers);

​

            FiddleHelper.WriteTable("1 - Without ValueGeneratedStrategyType", context.Customers.AsNoTracking().ToList());

        }   

        // CLEAR

        using (var context = new EntityContext())

        {

            context.Customers.DeleteFromQuery();

        }

        using (var context = new EntityContext())

        {

            var customers = new List<Customer>();

            customers.Add(new Customer() { Name = "ZZZ Projects", TokenLimit = 200 });

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

            context.BulkInsert(customers, options => {

                options.ForceValueGeneratedStrategy = ValueGeneratedStrategyType.OnAddOrUpdate;

            });

​

            FiddleHelper.WriteTable("2 - With ValueGeneratedStrategyType", context.Customers.AsNoTracking().ToList());

        }

    }

​

    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(c => c.TokenLimit)

                .HasDefaultValue(100);

​

            base.OnModelCreating(modelBuilder);

        }

​

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

    }

​

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public int TokenLimit { get; set; }

    }

}