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约700万条数据，耗时约5分钟，

 

protected void Page_Load(object sender, EventArgs e)
        {
            string path="D://1.TXT";
            string[] arr={"code","UserId","IsEncash","EncashDateTime","CreateTime","Mark"};
            DataSet ds = TextFileLoader(path, "tb", arr);

            int count = ds.Tables[0].Rows.Count;
            BulkInsert(ds.Tables[0]);
                   
            }

  /**/
        /**/
        /**/
        /// <summary>
        /// 文件加载
        /// </summary>
        /// <param name="FilePath">带文件名的路径</param>
        /// <param name="TableName">自定义的表名</param>
        /// <param name="FieldsInArray">自定义的表字段</param>
        /// <returns>DataSet</returns>

        public static DataSet TextFileLoader(string FilePath, string TableName, string[] FieldsInArray)
        {
            DataSet ds = new DataSet();
            DataTable dt = new DataTable(TableName);

            FileStream fs = File.Open(FilePath, FileMode.Open, FileAccess.Read);
            StreamReader sr = new StreamReader(fs);

            for (int i = 0; i < FieldsInArray.Length; i++)
            {
                dt.Columns.Add(new DataColumn(FieldsInArray[i], typeof(string)));
            }

            string strRead;
            bool flag = true;

            while (flag)
            {
                strRead = sr.ReadLine();

                if (!string.IsNullOrEmpty(strRead))
                {
                    string[] aryVale = strRead.Split('\t');

                    DataRow dr = dt.NewRow();
                    for (int k = 0; k < aryVale.Length; k++)
                    {
                        dr[FieldsInArray[k]] = aryVale[k];
                    }
                    dt.Rows.Add(dr);
                }
                else
                {
                    flag = false;
                }
            }

            ds.Tables.Add(dt);
            return ds;

        }

        private void BulkInsert(DataTable  dt) {
            string time = String.Empty;

            DateTime beginTime = DateTime.Now;

            using (SqlBulkCopy bulk = new SqlBulkCopy(System.Configuration.ConfigurationManager.ConnectionStrings["connectionString"].ToString())) 
            {

                //{"code","UserId","IsEncash","EncashDateTime","CreateTime","Mark"}
                bulk.BatchSize = 1000;
                bulk.DestinationTableName = "OfficeEncashOne";
                bulk.ColumnMappings.Add("code", "code");
                bulk.ColumnMappings.Add("UserId", "UserId");
                bulk.ColumnMappings.Add("IsEncash", "IsEncash");
                bulk.ColumnMappings.Add("EncashDateTime", "EncashDateTime");
                bulk.ColumnMappings.Add("CreateTime", "CreateTime");
                bulk.ColumnMappings.Add("Mark", "Mark"); 
                
                
                bulk.WriteToServer(dt); 
            } 
            DateTime endTime = DateTime.Now; 
            TimeSpan useTime = endTime - beginTime; 
            dt.Dispose(); 
            time = "使用时间" + useTime.TotalSeconds.ToString() + "秒"; 
        }