我有以下api控制器，可返回您在此处看到的查询的json表示形式：

public async Task<actionResult<IEnumerable<CarDto>>> getcarData(Guid carID)
{
    var carData = await (from cl in _context.CarList
                         join tl in _context.transmissionList
                             on cl.CId equals tl.CId
                         join to in _context.transmissionOptions
                             on tl.TId equals to.TId
                         where cl.CId == carID
                         select new CarDto
                         {
                             CarId = cl.CarId,TransmissionId = tl.TId,OptionId = to.OptionId,GearId = to.GearId
                         })
                         .ToListAsync();
    return carData;
}

返回的json数据如下：

[
    {
        "carId": "351a","transmissionId": "ec7","optionId": "a1","gearId": "674532a"
    },{
        "carId": "351a","optionId": "b7","gearId": "5f9173f"
    },"optionId": "c5","gearId": "cf807"
    }
]

但是，我希望对它进行格式化，以便有一个名为transmissionChoices的属性，其中包含一个可能的选项数组。

赞：

{
    "carId": "351a","transmissionChoices": [
        {
            "optionId": "a1","gearId": "674532a"
        },{
            "optionId": "b7","gearId": "5f9173f"
        },{
            "optionId": "c5","gearId": "cf807"
        }
    ]
}

有没有办法让控制器像这样格式化它？