SqlBulkCopy 批量插入

/// <summary>
        /// 批量插入数据
        /// </summary>
        /// <param name="pConnectstring"></param>
        /// <param name="dt"></param>
        /// <param name="tablename"></param>
        public static void BulkCopy(string pConnectstring, DataTable dt, string tablename, int pBatchSize = 10000)
        {
            Console.WriteLine("使用Bulk插入的实现方式");
            Stopwatch sw = new Stopwatch();

            using (SqlConnection conn = new SqlConnection(pConnectstring))
            {
                SqlBulkCopy bulkCopy = new SqlBulkCopy(conn);
                bulkCopy.DestinationTableName = tablename;//表名
                bulkCopy.BatchSize = pBatchSize;//SqlBulkCopy.BatchSize=10*10000 时候的效率最高~  数据一百W为例
                //bulkCopy.SqlRowsCopied += BulkCopy_SqlRowsCopied;
                conn.Open();
                sw.Start();

                if (dt != null && dt.Rows.Count != 0)
                {
                    bulkCopy.WriteToServer(dt);
                    sw.Stop();
                }

                Console.WriteLine(string.Format("插入{0}条记录共花费{1}毫秒", dt.Rows.Count, sw.ElapsedMilliseconds));
            }
        }

调用上面方面即可实现SqlBulkCopy 批量插入 

SqlBulkCopy  优点

       1.效率高

       2.操作简洁

SqlBulkCopy  注意事项

    1.列的顺序必须和表的顺序一致

       2.插入时做不到添加查重

       3.当表中有自增列时 datatable表中必须含有自增列不用添加值