public override System.Data.IDbConnection GetConnection()
        {
            if (Connection == null)
                Connection = base.GetConnection();

            return Connection;
        }

              public Basiclist(System.Data.IDbConnection connection, string volumename)
              {
                m_connection = connection;
                m_volumename = volumename;
                m_transaction = m_connection.BeginTransaction();
                var tablename = TABLE_PREFIX + "-" + Library.Utility.Utility.ByteArrayAsHexString(Guid.NewGuid().ToByteArray());

                using(var cmd = m_connection.CreateCommand())
                {
                    cmd.Transaction = m_transaction;
                    cmd.ExecuteNonQuery(string.Format(@"CREATE TEMPORARY TABLE ""{0}"" {1}", tablename, TABLEFORMAT));
                    m_tablename = tablename;
                }
                
                m_insertCommand = m_connection.CreateCommand();
                m_insertCommand.Transaction = m_transaction;
                m_insertCommand.CommandText = string.Format(@"INSERT INTO ""{0}"" {1}", m_tablename, INSERTCOMMAND);
                m_insertCommand.AddParameters(INSERTARGUMENTS);
            }

 public DBConnection(IDBProvider dbProvider, string ConnectionString)
 {
     this.CommandTimeout = 30;
     this._dbProvider = dbProvider;
     _conn = (System.Data.IDbConnection)_dbProvider.CreateConnection(ConnectionString);
 }

 /// <summary>
 /// ��ʼ������
 /// </summary>
 /// <param name="conn">���ݿ����Ӷ��