c# - 找不到与请求 URI 匹配的 HTTP 资源 - Web API + Angular

Question

当我尝试从 Web API 获取一些带有参数(类型 DateTime)的数据时，我收到错误 404 的响应:

Message : "No HTTP resource was found that matches the request URI 'http://localhost:53544/api/reservations/GetReservationByDate?date=Tue Jan 31 2017 16:00:00 GMT+0100'." MessageDetail : "No route providing a controller name was found to match request URI 'http://localhost:53544/api/reservations/GetReservationByDate?date=Tue Jan 31 2017 16:00:00 GMT+0100'"

我为此使用 AngularJS。在其他 Controller 中，我有带参数的方法，但没有 DateTime。这可能是问题吗？在此之前我有错误

400 Bad Request

配置路由对我有帮助。

这都是我的代码 - Controller 中的方法:

[HttpGet]
[ActionName("GetReservationByDate")]
[ResponseType(typeof(Reservation))]
public IHttpActionResult GetReservationByDate(DateTime date)
{
    var reservation = db.Reservations.Where(d => d.Date.Equals(date));
    if (reservation == null)
    {
        return NotFound();
    }
    return Ok(reservation);
}

路由配置文件:

config.Routes.MapHttpRoute(
    name: "CustomApi",
    routeTemplate: "api/Reservations/GetReservationByDate/{date}",
    defaults: new { date = RouteParameter.Optional}
);

config.Routes.MapHttpRoute(
    name: "DefaultApi",
    routeTemplate: "api/{controller}/{action}/{id}",
    defaults: new { id = RouteParameter.Optional }
);

和来自 AngularJS 的方法:

this.GetReservation = function (date) {
    var promise = $http({
        method: 'GET',
        url: 'api/reservations/GetReservationByDate?date=' + date,
        config: {
            params: {
                "date": date
            }
        }
    })
    .then(function (response) {
        return response;
    },
    function (response) {
        return response;
    });
    return promise;
}

我尝试了不同的组合，使用 FromUri、FromBody，但结果总是一样。

Answer 1

您需要为 Controller 和操作设置默认值，因为路由模板中不包含模板参数。

config.Routes.MapHttpRoute(
    name: "CustomApi",
    routeTemplate: "api/Reservations/GetReservationByDate/{date}",
    defaults: new { controller = "Reservations", action = "GetReservationByDate", date = RouteParameter.Optional}
);

更新操作以允许错误数据

[HttpGet]
[ActionName("GetReservationByDate")]
[ResponseType(typeof(Reservation))]
public IHttpActionResult GetReservationByDate(DateTime? date) {    
    if(date.HasValue) {
        var reservation = db.Reservations.Where(d => d.Value.Date.Equals(date)).ToList();
        if (reservation.Count == 0) {
            return NotFound();
        }
        return Ok(reservation);
    }
    return BadRequest();
}

同时尝试格式化客户端的日期以确保它以正确的格式发送

this.GetReservation = function (date) {
    var jsonDate = date.toJSON();
    var promise = $http({
        method: 'GET',
        url: 'api/reservations/GetReservationByDate?date=' + jsonDate,
        config: {
            params: {
                "date": jsonDate
            }
        }
    })
    .then(function (response) {
        return response;
    },
    function (response) {
        return response;
    });
    return promise;
}