// Bulk Operations

// Doc: https://bulk-operations.net/bulk-insert

​

// @nuget: Z.BulkOperations

// @nuget: System.Data.SqlClient

​

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Data;

using System.Data.SqlClient;

using Z.BulkOperations;

​

public class Program

{

    public static List<BenchmarkResult> BenchmarkResults = new List<BenchmarkResult>();

    public static void Main()

    {

        GenerateDatabase();

        JustInTime_Compile();

        // Generate X customers

        var customers = GenerateCustomers(1000);

        var clockBulkInsert = new Stopwatch();

        using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))

        {

            connection.Open();

            // BulkInsert

            using (var bulk = new BulkOperation<Customer>(connection))

            {

                bulk.DestinationTableName = "Customers";

                bulk.AutoMapOutputDirection = false; // performance can be improved with options

                clockBulkInsert.Start();

                bulk.BulkInsert(customers); 

                clockBulkInsert.Stop();

                BenchmarkResults.Add(new BenchmarkResult() { Action = "BulkInsert (EF Extensions)", Entities = customers.Count, Performance = clockBulkInsert.ElapsedMilliseconds + " ms" });

            }

        }

        FiddleHelper.WriteTable(BenchmarkResults);

    }

    public static void JustInTime_Compile()

    {

        var customers = GenerateCustomers(20);

        using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))

        {

            connection.Open();

            // BulkInsert

            using (var bulk = new BulkOperation<Customer>(connection))

            {

                bulk.DestinationTableName = "Customers";

                bulk.AutoMapOutputDirection = false;

                bulk.BulkInsert(customers);

                // Clean

                bulk.BulkDelete(customers);

            }

        }

    }

    public static List<Customer> GenerateCustomers(int count)

    {

        var list = new List<Customer>();

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

        {

            list.Add(new Customer() { Name = "Customer_" + i, Description = "Description_" +  i, IsActive = i % 2 == 0 });

        }

​

        return list;

    }

​

public static void GenerateDatabase()

    {

        using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))

        {

            connection.Open();

            using (var command = connection.CreateCommand())

            {

                command.CommandText = @"   

CREATE TABLE [Customers]

(

    [CustomerID] [INT] IDENTITY(1,1) NOT NULL,

    [Name] [NVARCHAR](MAX) NULL,

    [Description] [NVARCHAR](MAX) NULL,

    [IsActive] [BIT] NOT NULL,

    CONSTRAINT [PK_Customers] PRIMARY KEY CLUSTERED 

    (

        [CustomerID] ASC

    )

)

 ";

                command.ExecuteNonQuery();

            }

        }

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

        public Boolean IsActive { get; set; }

    }

    public class BenchmarkResult

    {

        public string Action { get; set; }

        public int Entities { get; set; }

        public string Performance { get; set; }

    }

}