// Entity Framework Extensions

// Doc: https://entityframework-extensions.net/update-from-query

​

// @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;

​

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        // Insert data

        using (var context = new EntityContext())

        {

            context.BulkInsert(Data());

            FiddleHelper.WriteTable("1 - Before: ", context.Customers.ToList());

        }

        using (var context = new EntityContext())

        {

            context.Customers.Where(x => x.Counter >= 1).UpdateFromQuery(x => new Customer {Counter = x.Counter + 10});

            FiddleHelper.WriteTable("2 - After: ", context.Customers.ToList());

        }

    }

    public static List<Customer> Data() 

    {

        List<Customer>  list = new List<Customer>();

        bool isActive = false;

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

        {

            isActive = !isActive;

            list.Add(new Customer() { Name = "Customer_" + i, Counter = i });

        }

        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 int Counter { get; set; }

    }

}