c# - 为什么发送到 POST 的类对象为 NULL？

Question

我在 api Controller 中有这个 POST 方法。

public void Post(EngineeringData EngineeringData)
{
    EngineeringDataDAL EngDataDAL = new EngineeringDataDAL();

    EngDataDAL.InsertEngineeringData(EngineeringData);
}

我正在使用 POSTMAN 向它发送测试数据。

 EngineeringData = {
    'FunctionalLocation': 'Functional1',
    'WINFileNo': 'WinFileNo-01',
    'EqptType': 'EqptType-01',
    'ComponentTagNo': 'Componenttag-01'
}

但是方法的参数是null。为什么？

工程数据.cs

public class EngineeringData
{
    public int EnggDataID { get; set; }
    public string FunctionalLocation { get; set; }
    public string WinFileNo { get; set; }
    public string EqptType { get; set; }
    public string ComponentTagNo { get; set; }
}

Answer 1

I have this POST method in api controller.

 public void Post(EngineeringData EngineeringData)

你可能错过的是

 public void Post([FromBody] EngineeringData EngineeringData)