ASP.NET核心HttpGet单个Web API

Question

早上好，

我在设置HTTPGET并在Postman中测试解决方案时遇到困难。

我试图在两种情况下都返回单个结果，但是当我输入参数时，没有任何加载。因此，我显然缺少一些需要帮助的地方。

我在CashMovementController中有1个参数{id}，如果我导航到localhost / api / cashmovements / {id}，它将加载，但是如果在邮递员中传递{id}参数，它将失败。

然后在我的BondCreditRatingsController中，我有2个参数{ISIN}和{Date}，同样我不确定如何处理此参数。

希望听到有关此的一些建议/帮助

感谢GWS

Startup.cs

        app.UseMvc(routes =>
        {
            routes.MapRoute(
                name: "default",
                template: "{controller=Home}/{action=Index}/{id?}");
        });

CashMovementsController.cs

[Route("api/[controller]")]
public class CashMovementsController : Controller
{
    private ICashMovementRepository _cashmovementRepository;

    [HttpGet("{id}", Name = "GetCashMovement")]
    public IActionResult Get(int id)
    {

        CashMovement _cashmovement = _cashmovementRepository.GetSingle(u => u.CashMovementId == id);

        if (_cashmovement != null)
        {
            CashMovementViewModel _cashmovementVM = Mapper.Map<CashMovement, CashMovementViewModel>(_cashmovement);
            return new OkObjectResult(_cashmovementVM);
        }
        else
        {
            return NotFound();
        }
    }
}

BondCreditRatingsController.cs

[Route("api/[controller]")]
public class BondCreditRatingsController : Controller
{
    private IBondCreditRatingRepository _bondcreditratingRepository;


    public BondCreditRatingsController(IBondCreditRatingRepository bondcreditratingRepository)
    {
        _bondcreditratingRepository = bondcreditratingRepository;
    }

    [HttpGet("{id}", Name = "GetBondCreditRating")]
    public IActionResult Get(string id, DateTime efffectivedate)
    {

        BondCreditRating _bondcreditrating = _bondcreditratingRepository.GetSingle(u => u.ISIN == id, u => u.EffectiveDate == efffectivedate);

        if (_bondcreditrating != null)
        {
            BondCreditRatingViewModel _bondcreditratingVM = Mapper.Map<BondCreditRating, BondCreditRatingViewModel>(_bondcreditrating);
            return new OkObjectResult(_bondcreditratingVM);
        }
        else
        {
            return NotFound();
        }
    }

Answer 1

如果要将其映射到api / Controller / method / id，则需要使用以下代码，因为要将参数顺序（无其他标识符）映射到操作中的特定参数名称。

[HttpGet("GetCashMovement/{id}")]

您当前的代码应在下面使用，因为您使用的是命名参数，并且因为请求无法映射到任何其他模板。

/api/CashMovements/GetCashMovement?id=1

但是该属性语法也会（可能无意地）触发：

/api/CashMovements/1

由于您为该操作定义的模板的总和为：

[Route("api/[controller]/{id}")]

为什么/ api / ApiTest / GetCashMovement映射GetCashMovement.Get（int i）的原因是因为id在启动时被定义为可选的

routes.MapRoute(
    name: "default",
    template: "{controller=Home}/{action=Index}/**{id?}**");

路径参数名称后的问号（？）定义了可选参数。

https://docs.microsoft.com/en-us/aspnet/core/fundamentals/routing?view=aspnetcore-3.0#create-routes