// Entity Framework Extensions

// Doc: https://entityframework-extensions.net/where-bulk-contains#can-i-use-wherebulkcontains-after-a-where

​

// @nuget: Newtonsoft.Json

// @nuget: Microsoft.EntityFrameworkCore.SqlServer

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

​

using System;

using System.Collections.Generic;

using System.ComponentModel.DataAnnotations.Schema;

using System.Dynamic;

using System.Linq;

using Microsoft.Data.SqlClient;

using Microsoft.EntityFrameworkCore;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        // Doc: https://entityframework-extensions.net/where-bulk-contains#can-i-use-wherebulkcontains-after-a-where

        SeedDatabase();

        var deserializedCustomers = Newtonsoft.Json.JsonConvert.DeserializeObject<List<Customer>>(GetSerializedCustomers());

        FiddleHelper.WriteTable("1 - DeserializedCustomers", deserializedCustomers);

​

        // ## Can I use WhereBulkContains after a Where?

        // Yes, the `WhereBulkContains` is like any other LINQ method. You can chain any linq method, even a `Where` with a contains method.

        {

            using (var context = new EntityContext())

            {

                var customers = context.Customers.Where(x => x.CustomerID >= 2).WhereBulkContains(deserializedCustomers);

                FiddleHelper.WriteTable("2 - Can I use WhereBulkContains after a Where`", customers);

            }

        }

    }

​

    public static void SeedDatabase()

    {

        using (var context = new EntityContext())

        {

            var list = new List<Customer>();

​

            for (int i = 0; i < 5; i++)

            {

                list.Add(new Customer() { Code = "Original_" + i, Email = "Original_" + i, FirstName = "Original_" + i, LastName = "Original_" + i });

            }

​

            context.BulkInsert(list);

        }

    }

​

    public static string GetSerializedCustomers()

    {

        var customers = new List<Customer>();

​

        for (int i = 0; i < 3; i++)

        {

            customers.Add(new Customer() { CustomerID = i + 1, Code = "Original_" + i, Email = "Updated_" + i, FirstName = "Updated_" + i, LastName = "Updated_" + i });

        }

​

        return JsonConvert.SerializeObject(customers);

    }

​

    public class EntityContext : DbContext

    {

        static EntityContext()

        {

            using (var context = new EntityContext())

            {

                context.Database.EnsureCreated();

            }

        }

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

​

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

        {

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

​

            base.OnConfiguring(optionsBuilder);

        }

    }

​

    [Table("Customer")]

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Code { get; set; }

        public string Email { get; set; }

        public string FirstName { get; set; }

        public string LastName { get; set; }

    }

}