SqlBulkCopy sqlBulkCopy = new SqlBulkCopy("server=.;uid=sa;pwd=sa;database=iisLogTest");
            sqlBulkCopy.DestinationTableName = "iisLogTable";//目标表名
            sqlBulkCopy.BatchSize = dt.Rows.Count;
            SqlConnection sqlConnection = new SqlConnection("server=.;uid=sa;pwd=sa;database=iisLogTest");
            sqlConnection.Open();
            if (dt != null && dt.Rows.Count != 0)
            {
                sqlBulkCopy.WriteToServer(dt);
            }
            sqlBulkCopy.Close();
            sqlConnection.Close();
            stopwatch.Stop();