// Entity Framework Extensions

// Doc: https://entityframework-extensions.net/bulk-insert-optimized

​

// @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;

using System.Diagnostics;

​

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        var customers = GenerateCustomers(100);

        using (var context = new EntityContext())

        {

            // example 1

            var analysis = context.BulkInsertOptimized(customers);

​

            if(analysis.IsOptimized)

            {

                Console.WriteLine("1 - The BulkInsert is considered as optimized.");

            }

            else

            {

                Console.WriteLine("1 - The BulkInsert is NOT considered as optimized. Reasons:");

                Console.WriteLine(analysis.TipsText);

            }

        }

​

        Console.WriteLine("---");

        Console.WriteLine("---");

        using (var context = new EntityContext())

        {

            // example 2

            var analysis = context.BulkInsertOptimized(customers, options => {

                options.InsertIfNotExists = true;

            });

​

            if(analysis.IsOptimized)

            {

                Console.WriteLine("2 - The BulkInsert is considered as optimized.");

            }

            else

            {

                Console.WriteLine("2 - The BulkInsert is NOT considered as optimized. Reasons:");

                Console.WriteLine(analysis.TipsText);

            }

        }

    }

    public static List<Customer> GenerateCustomers(int count)

    {

        var list = new List<Customer>();

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

        {

            list.Add(new Customer() { Name = "Customer_" + i, Description = "Description_" +  i, IsActive = i % 2 == 0 });

        }

​

        return list;

    }

​

    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; }

        public string Description { get; set; }

        public Boolean IsActive { get; set; }       

        public string Column1 { get; set; }

        public string Column2 { get; set; }

        public string Column3 { get; set; }

        public string Column4 { get; set; }

        public string Column5 { get; set; }

        public string Column6 { get; set; }

        public string Column7 { get; set; }

        public string Column8 { get; set; }

        public string Column9 { get; set; }

    }

}