所以，如果我在接受一个对象的控制器上有Post方法(JSON序列化，比方说)并返回一个HttpResponseMessage，其中HttpStatusCode Created和Content设置为同一个对象，Id从null更新为整数，那么我如何使用HttpClient获取在那个Id值？

它可能很简单，但我看到的只是System.Net.Http.StreamContent。从post方法返回Int更好吗？

谢谢。

更新(以下回答)：

一个工作的例子……

namespace TryWebAPI.Models {
    public class YouAreJoking {
        public int? Id { get; set; }
        public string ReallyRequiresFourPointFive { get; set; }
    }
}
 
namespace TryWebAPI.Controllers {
    public class RyeController : ApiController {
        public HttpResponseMessage Post([FromBody] YouAreJoking value) {
            //Patience simulated
            value.Id = 42;
 
            return new HttpResponseMessage(HttpStatusCode.Created) {
                Content = new ObjectContent<YouAreJoking>(value,new JsonMediaTypeFormatter(),new MediaTypeWithQualityHeaderValue("application/json"))
            };
        }
    }
}
 
namespace TryWebApiClient {
    internal class Program {
        private static void Main(string[] args) {
            var result = CreateHumour();
            Console.WriteLine(result.Id);
            Console.ReadLine();
        }
 
        private static YouAreJoking CreateHumour() {
            var client = new HttpClient();
            var pennyDropsFinally = new YouAreJoking { ReallyRequiresFourPointFive = "yes",Id = null };
 
            YouAreJoking iGetItNow = null;
            var result = client
                .PostAsJsonAsync("http://localhost:1326/api/rye",pennyDropsFinally)
                .ContinueWith(x => {
                                var response = x.Result;
                                var getResponseTask = response
                                    .Content
                                    .ReadAsAsync<YouAreJoking>()
                                    .ContinueWith<YouAreJoking>(t => {
                                        iGetItNow = t.Result;
                                        return iGetItNow;
                                    }
                );
 
                Task.WaitAll(getResponseTask);
                return x.Result;
            });
 
            Task.WaitAll(result);
            return iGetItNow;
        }
    }
}

似乎Node.js受到启发。