// Entity Framework Extensions

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

​

// @nuget: Microsoft.EntityFrameworkCore.SqlServer

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

// @nuget: Z.Expressions.Eval

​

using Microsoft.EntityFrameworkCore;

using System;

using System.Collections.Generic;

using System.Linq;

using Microsoft.Data.SqlClient;

using Z.Expressions;

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

            context.BulkInsert(CustomerToSeed());

        }

        using (var context = new EntityContext())

        {

            //  custom filter coming from user input or database

            string customFilter = "x.IsActive && x.CreatedDate <= #2016-11-15#";

            var customers = context.Customers.WhereDynamic(x => customFilter);

            FiddleHelper.WriteTable("1 - Customers", customers);

        }   

    }

    public static List<Customer> CustomerToSeed()

    {

        var list = new List<Customer>();

        list.Add(new Customer() { Name = "Jon", IsActive = true, CreatedDate = new DateTime(2014, 01, 01)});

        list.Add(new Customer() { Name = "Alex", IsActive = false, CreatedDate = new DateTime(2015, 06, 19)});

        list.Add(new Customer() { Name = "Mikael", IsActive = true, CreatedDate = new DateTime(2016, 11, 15)});

        list.Add(new Customer() { Name = "Zeinab", IsActive = false, CreatedDate = new DateTime(2018, 12, 02)});

        list.Add(new Customer() { Name = "Marie-Lou", IsActive = true, CreatedDate = new DateTime(2020, 10, 15)});

        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 bool IsActive { get; set; }

        public DateTime CreatedDate { get; set; }

    }

}