SqlOperate SqlOperateQuery; bool sqlFlag = false; sqlFlag = SqlOperateQuery.sql_connection(databbseName, url, user, password); if (sqlFlag == true) { SqlOperateQuery.sqlQuery(sqlCommandQuery); } double Solar1 = SqlOperateQuery.result->getDouble("Solar"); double temperature1 = SqlOperateQuery.result->getDouble("Temperature"); SqlOperateQuery.sql_Queryfree(); getDouble(“Solar”)函数报错:无效参数异常。结果集只有一行数据,是这样子的Time Solar TemperatureXX XX XX
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