// Dapper Plus

// Doc: https://dapper-plus.net/bulk-insert

​

// @nuget: Dapper

// @nuget: Microsoft.Data.SqlClient

// @nuget: Z.Dapper.Plus

​

using System;

using System.Collections.Generic;

using System.ComponentModel.DataAnnotations;

using System.ComponentModel.DataAnnotations.Schema;

using System.Linq;

using System.Diagnostics;

using Microsoft.Data.SqlClient;

using Dapper;

using Z.Dapper.Plus;

​

public class Program

{   

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

    public static void Main()

    {

        // Map your entity

        DapperPlusManager.Entity<Product>()

            .Table("Product")

            .Identity(x => x.ProductID);

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

        connection.CreateTable<Product>();

        JustInTime_Compile(connection);

        var products = GenerateProducts(2000);

        var clockDapper = new Stopwatch();

        var clockDapperInParameter = new Stopwatch();

        var clockDapperPlus = new Stopwatch();

        // Dapper

        {

            // seed the database

            connection.BulkInsert(products);

            clockDapper.Start();

            connection.Execute(@"DELETE Product WHERE ProductID = @ProductID", products);

            clockDapper.Stop();

​

            BenchmarkResults.Add(new BenchmarkResult() { Action = "Dapper", Entities = products.Count, Performance = clockDapper.ElapsedMilliseconds + " ms" });

        }

        // Delete (IN Parameter)

        {

            // seed the database

            connection.BulkInsert(products);

            clockDapperInParameter.Start();

            connection.Execute(@"DELETE Product WHERE ProductID IN @ProductIDs", new { ProductIDs = products.Select(x => x.ProductID).ToList() });

            clockDapperInParameter.Stop();

​

            BenchmarkResults.Add(new BenchmarkResult() { Action = "Delete (IN Parameter)", Entities = products.Count, Performance = clockDapperInParameter.ElapsedMilliseconds + " ms" });

        }

        // Dapper Plus

        {

            // seed the database

            connection.BulkInsert(products);

            // BulkDelete

            clockDapperPlus.Start();

            connection.BulkDelete(products);

            clockDapperPlus.Stop();

​

            var timeFaster = Math.Round((double)clockDapper.ElapsedMilliseconds / clockDapperPlus.ElapsedMilliseconds, 2);

            var reducedPercent = Math.Round((double)(clockDapper.ElapsedMilliseconds - clockDapperPlus.ElapsedMilliseconds) / clockDapper.ElapsedMilliseconds, 2) * 100;

            BenchmarkResults.Add(new BenchmarkResult() { Action = "Dapper Plus", Entities = products.Count, Performance = $"{clockDapperPlus.ElapsedMilliseconds} ms", TimeFaster = $"{timeFaster}x faster than Dapper", ReducedPercent = $"Time reduced by {reducedPercent}% compared to Dapper" });

        }

        FiddleHelper.WriteTable(BenchmarkResults);

    }

    public static List<Product> GenerateProducts(int count)

    {

        var products = new List<Product>();

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

        {

            if(i % 3 == 0)

            {

                products.Add(new Product() { Name = "Dapper Plus", Description = @"Use <a href=""https://dapper-plus.net/"" target=""_blank"">Dapper Plus</a> to extend your IDbConnection with high-performance bulk operations.", Column1 = i.ToString(), Column2 = i.ToString(), Column3 = i.ToString(), Column4 = i.ToString(), Column5 = i.ToString(), Column6 = i.ToString(), Column7 = i.ToString(), Column8 = i.ToString(), Column9 = i.ToString() });

            }

            else if(i % 3 == 1)

            {

                products.Add(new Product() { Name = "C# Eval Expression", Description = @"Use <a href=""https://eval-expression.net/"" target=""_blank"">C# Eval Expression</a> to compile and execute C# code at runtime.", Column1 = i.ToString(), Column2 = i.ToString(), Column3 = i.ToString(), Column4 = i.ToString(), Column5 = i.ToString(), Column6 = i.ToString(), Column7 = i.ToString(), Column8 = i.ToString(), Column9 = i.ToString() });

            }

            else if (i % 3 == 2)

            {

                products.Add(new Product() { Name = "Entity Framework Extensions", Description = @"Use <a href=""https://entityframework-extensions.net/"" target=""_blank"">Entity Framework Extensions</a> to extend your DbContext with high-performance bulk operations.", Column1 = i.ToString(), Column2 = i.ToString(), Column3 = i.ToString(), Column4 = i.ToString(), Column5 = i.ToString(), Column6 = i.ToString(), Column7 = i.ToString(), Column8 = i.ToString(), Column9 = i.ToString() });

            }

        }

​

        return products;

    }

    public static void JustInTime_Compile(SqlConnection connection)

    {

        var products = GenerateProducts(20);

        // Dapper

        {

            connection.Execute(@"DELETE Product WHERE ProductID = @ProductID", products);

        }

        // Delete (IN Parameter)

        {

            connection.Execute(@"DELETE Product WHERE ProductID IN @ProductIDs", new { ProductIDs = products.Select(x => x.ProductID).ToList() });

        }

        // Dapper Plus

        {

            connection.BulkUpdate(products);

        }

    }

    [Table("Product")]

    public class Product

    {

        [Key]

        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]

        public int ProductID { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

        public string Column1 { get; set; }

        public string Column2 { get; set; }

        public string Column3 { get; set; }

        public string Column4 { get; set; }

        public string Column5 { get; set; }

        public string Column6 { get; set; }

        public string Column7 { get; set; }

        public string Column8 { get; set; }

        public string Column9 { get; set; }

    }

    public class BenchmarkResult

    {

        public string Action { get; set; }

        public int Entities { get; set; }

        public string Performance { get; set; }     

        public string TimeFaster { get; set; }

        public string ReducedPercent { get; set; }

    }

}