public static DataSet GetDataSet(string databaseName, CommandType cmdType, string cmdText)
        {
            switch (NameTypeList[databaseName].ToLower())
            {
            case "sqlserver":
                return(SqlServerUtil.GetDataSet(NameConnStrList[databaseName], cmdType, cmdText));

            case "mysql":
                return(MySqlUtil.GetDataSet(NameConnStrList[databaseName], cmdType, cmdText));

            case "oracle":
                return(OracleUtil.GetDataSet(NameConnStrList[databaseName], cmdType, cmdText));

            default:
                return(null);
            }
        }
        public static int ExecuteNonQuery(string databaseName, CommandType cmdType, string cmdText)
        {
            switch (NameTypeList[databaseName].ToLower())
            {
            case "sqlserver":
                return(SqlServerUtil.ExecuteNonQuery(NameConnStrList[databaseName], cmdType, cmdText));

            case "mysql":
                return(MySqlUtil.ExecuteNonQuery(NameConnStrList[databaseName], cmdType, cmdText));

            case "oracle":
                return(OracleUtil.ExecuteNonQuery(NameConnStrList[databaseName], cmdType, cmdText));

            default:
                return(-1);
            }
        }