同步按照NewTable中ID存储情况将数据按照规则同步至OldTable,并清空OldTable中多余数据行,返回错误消息

  public string UpdateDataAdapter(DataTable tab)
        {
            if (sda == null) return "DataAdapter还未初始化，请调用GetAdapterTable()方法进行促使化！";
            //if (IsHaveTran)
            //{
            //    sda.SelectCommand.Transaction = sqltran;
            //}
            sda.SelectCommand.Transaction = sqltran;
            SqlCommandBuilder scb = new SqlCommandBuilder(sda);
            try
            {
                sda.Update(tab);
                m_dbLog.Trans = sqltran;
                m_dbLog.Conn = SqlConnection;
                DbUpdateLogApi api = DbUpdateLogApiFacotry.GetInterfaceInfo(m_dbLog.FunctionType, m_dbLog);
                //string strmessage = api.Execute();
                //if (!string.IsNullOrEmpty(strmessage))
                //{
                //    RollbackTransaction();
                //    Close();
                //    return strmessage;
                //}

                if (_autoCommit)
                {
                    sqltran.Commit();
                    _autoCommit = false;
                }
                return string.Empty;

            }
            catch (Exception e)
            {
                RollbackTransaction();
                Close();
                return e.Message;
            }
            finally
            {
                scb.Dispose();
            }
        }