// Entity Framework Extensions

// Doc: https://entityframework-extensions.net/column-synchronize-delete-key-subset-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();

        }

        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;

                // we want to synchronize only customer of Type = 1 and Type = 3

                options.SynchronizeDeleteDestinationTableFilterFormula = "DestinationTable.Type IN (1, 3)";

            });

            FiddleHelper.WriteTable("Update Customer 1; Remove Customer 2; Do nothing Customer 3; Delete Customer 4; Insert Customer_5",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.Customers.Add(new Customer() { Name = "Jonathan", Type = 3, Description = "Description of Jonathan", IsActive = true });

            context.BulkSaveChanges();

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

        }

    }

    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 int Type { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

        public Boolean IsActive { get; set; }

    }

}