public bool BackupAA()

        {

            int temp = 0;

            int tempdel = 0;

            string sql = "INSERT INTO  [WMSBAK].[dbo].[AACopy] SELECT * FROM  [TestDB].[dbo].[AA] WHERE AddDate <= DATEADD( d ,-45,GETDATE())";

            try

            {

                temp = dbhelper.ExcuteNonequery(sql);

            }

            catch (Exception)

            {

            }

            if (temp > 0)

            {

                string delsql = "DELETE [TestDB].[dbo].[AA] WHERE AddDate < DATEADD( d ,-45,GETDATE())";

                try

                {

                    tempdel = dbhelper.ExcuteNonequery(delsql);

                }

                catch (Exception)

                {

                    throw;

                }

                if (tempdel > 0)

                {

                    return true;

                }

                else

                {

                    return false;

                }

            }

            else

            {

                return false;

            }

        }