最近學習了Dapper，聽說它裡面有批量插記錄的功能，就寫了個小程式來測試下：分別用SqlBulkCopay,原始的單條插入，Dapper批量插入5萬條記錄。

表結構 tb_User （id, UserName,Password)

比較結果如下：

1.Dapper: 花費時間10秒

 public void TesDappertBatch()
        {
            IDbConnection connection = new SqlConnection(_connect);
            connection.Open();
            var tran = connection.BeginTransaction(IsolationLevel.Serializable);
            var userList=Enumerable.Range(1, 50000).Select(i => new User
            {
                UserName = "User" + i,
                Password="pwd"+i

            });
            Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start();
            var result = connection.Execute("insert tb_User(UserName,Password) values(@UserName,@Password)", userList,tran);
            tran.Commit();
            stopwatch.Stop();
            Console.WriteLine(stopwatch.ElapsedMilliseconds);
            Console.ReadLine();//10023

        }
 

 public void TestBulk()
        {
            BulkCopyHelper bh = new BulkCopyHelper(_connect);
            DataTable dt = new DataTable();
            dt.Columns.Add("UserName", typeof(string));
            dt.Columns.Add("PassWord", typeof(string));
            for(int i=0;i<50000;i++)
            {
                dt.Rows.Add(new object[] { "User" + i, "pwd" + i });
            }
            
            bh.SetMappingList(dt);
            bh.DestTable = "tb_User";
            Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start();
            bh.BulkInsert(dt);
            stopwatch.Stop();
            Console.WriteLine(stopwatch.ElapsedMilliseconds);

            Console.ReadLine(); //1551

            
        }
 

   public void TestSingInsert()
        {
            
            Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start();
            for (int i=0;i< 50000;i++)
            {
                string sql = @"
insert tb_User(UserName,PassWord) values(@p1,@p2)
";
                string user = "User" + i;
                string pwd = "Pwd" + i;
                SqlHelper.ExecuteNonQuery(_connect, CommandType.Text, sql, new SqlParameter[] { new SqlParameter("@p1", user),new SqlParameter("@p2",pwd )});
            }

            stopwatch.Stop();
            Console.WriteLine(stopwatch.ElapsedMilliseconds);

            Console.ReadLine(); //60469
        }