// Entity Framework Extensions

// Doc: https://entityframework-extensions.net/column-output-expression

​

// @nuget: Microsoft.EntityFrameworkCore.SqlServer

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

​

using System;

using System.Linq;

using Microsoft.EntityFrameworkCore;

using System.Collections.Generic;

using Microsoft.Data.SqlClient;

using Z.BulkOperations;

​

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        List<Customer> list =  new List<Customer>() { new Customer() { Name ="Customer_A", Description = "Description" , IsActive = false }, 

        new Customer()  { Name ="Customer_B", Description = "Description", IsActive = true },

        new Customer() { Name ="Customer_C", Description = "Description" , IsActive = true }};

        // ColumnOutputExpression: Gets or sets columns to map with the direction Output.

        using (var context = new EntityContext())

        {

            context.BulkInsert(list, options => {

                options.ColumnOutputExpression = c => new { c.CustomerID, c.Name, c.IsActive };

                options.ColumnInputExpression = c => new { c.IsActive };

            });

            FiddleHelper.WriteTable("Change On List",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; }

    }

}