// Entity Framework Extensions

// Doc: https://entityframework-extensions.net/column-synchronize-delete-key-subset-expression

​

// @nuget: EntityFramework

// @nuget: Z.EntityFramework.Extensions

​

using System;

using System.Collections.Generic;

using System.Linq;

using System.Data.Entity;

​

public class Program

{

    public static void Main()

    {

        GenerateData();

​

        var customers = new List<Customer>();

        customers.Add(new Customer() { Name = "Carson", Type = 1, Description = "Updated_Description of Carson", IsActive = false });

        customers.Add(new Customer() { Name = "Alexander", Type = 1, Description = "Description of Alexander", IsActive = false });

​

        using (var context = new EntityContext())

        {

            context.BulkSynchronize(customers, options => {

                options.ColumnPrimaryKeyExpression = customer => customer.Name;

                options.ColumnSynchronizeDeleteKeySubsetExpression = customer => customer.Type;

            });

            FiddleHelper.WriteTable("Update Customer_A; Remove Customer_B; Do nothing Customer_C; Insert Customer_D",context.Customers.ToList());

        }

    }

    public static void GenerateData()

    {

        using (var context = new EntityContext())

        {

            context.Customers.Add(new Customer() { Name = "Carson", Type = 1, Description = "Description of Carson", IsActive = true });

            context.Customers.Add(new Customer() { Name = "Meredith", Type = 1, Description = "Description of Meredith", IsActive = true });

            context.Customers.Add(new Customer() { Name = "Arturo", Type = 2, Description = "Description of Arturo", IsActive = true });

            context.BulkSaveChanges();

            FiddleHelper.WriteTable("Before BulkSynchronize",context.Customers.ToList());

        }

    }

    public class EntityContext : DbContext

    {

        public EntityContext() : base(FiddleHelper.GetConnectionStringSqlServer())

        {

​

        }

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

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public int Type { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

        public Boolean IsActive { get; set; }

    }

}