CSDataBase.cDataBase.createCommand C# (CSharp) Method

        private DbCommand createCommand(string sqlstmt)
        {
            DbCommand ocmd = null;
            
            switch (m_databaseEngine)
            {
                case csDatabaseEngine.SQL_SERVER:
                    ocmd = new SqlCommand(sqlstmt, m_ocn as SqlConnection);
                    break;
                case csDatabaseEngine.POSTGRESQL:
                    throw new NotImplementedException();
                case csDatabaseEngine.ORACLE:
                    ocmd = new OracleCommand(sqlstmt, m_ocn as OracleConnection);
                    break;
                case csDatabaseEngine.CSREPORT_WEB:
                    ocmd = new cJSONCommand(sqlstmt, m_ocn as cJSONServerConnection);
                    break;
            }
            
            if(ocmd == null)
                throw new Exception("The database engine is not supported " + m_databaseEngine.ToString());
            
            ocmd.CommandTimeout = m_commandTimeout;
            ocmd.CommandType = CommandType.Text;
            
            return ocmd;
        }