在Embarcadero C++Builder中将数据从C++Builder转换为String

Question

如何将从FireDAC查询(MySQL数据库)获得的数据转换为字符串？我的代码如下：

String query_id_person = "select max(id_person) from data"; //query to database
FDQuery1->SQL->Text = query_id_person; //assigning value of query to Query component
FDQuery1->Active = true; //"Running" Query

如何将此查询的结果数据获取到C++中的字符串？

String ID_PERSON = FDQuery1->???(value?)      

Answer 1

可以使用FieldByName函数读取数据集中各个字段的内容：

const String FieldNameYouWantToRead = "Your field name here";
String ID_PERSON = FDQuery1->FieldByName(FieldNameYouWantToRead)->AsString`;