WCF RESTful Console-hosted, return 400 Bad Request - wcf

Question

Studying WCF RESTful, host in a Console,
my steps:
create sample models
create contract of service
create service
host this service in a console.
run this host, looks ok.
create a winform, use service address via json post to service host.
i hope it would work, but return http 400.
I tried on WCF(not REST) Console-hosted, WebAPI, steps all ok.
finally, stackoverflow.com
please help
Models
[Serializable]
public abstract class Building
{
public Manufacturer Manufacturer { get; set; }
}
[Serializable]
public class Manufacturer
{
public string Name { get; set; }
public string Telephone { get; set; }
}
[Serializable]
public class Furniture : Building
{
public string Name { get; set; }
}
[Serializable]
public class Reception
{
public int Floor { get; set; }
public int Number { get; set; }
}
[Serializable]
public class Room : Building
{
public string Number { get; set; }
public List<Furniture> Furnitures { get; set; }
}
[Serializable]
public class Hotel : Building
{
public Guid Guid { get; set; }
public List<Reception> Receptions { get; set; }
public List<Room> Rooms { get; set; }
public string Name { get; set; }
public string Address { get; set; }
}
Contract
[ServiceContract]
public interface IHotel
{
// Create objct Hotel
[OperationContract]
[WebInvoke(UriTemplate = "", Method = "POST", RequestFormat= WebMessageFormat.Json, ResponseFormat=WebMessageFormat.Json)]
bool Create(Hotel hotel);
}
Service
public class HotelService : I Hotel
{
public bool Build(Models.Hotel hotel)
{
if (hotel == null)
return false;
// codes here is object hotel(EF) creation, test OK
return true;
}
}
Host(Console)
WebServiceHost serviceHost = new WebServiceHost(typeof(Demo.Services.HotelService), new Uri("http://192.168.1.101/HotelService"));
ServiceEndpoint endpoint = serviceHost.AddServiceEndpoint(typeof(Demo.Contracts.IHotel), new WebHttpBinding(), "");
ServiceDebugBehavior sdb = serviceHost.Description.Behaviors.Find<ServiceDebugBehavior>();
sdb.HttpHelpPageEnabled = false;
Console.WriteLine("Starting Service...");
// start service
serviceHost.Open();
Console.WriteLine("Started, press RETURN to exit.");
Console.ReadLine();
serviceHost.Close();
Client(Winform)
Caller
public bool BuildHotel(string json)
{
WebRequest request = HttpWebRequest.Create("http://192.168.1.101/HotelService");
request.ContentType = "application/json";
byte[] data = Encoding.UTF8.GetBytes(json);
request.ContentLength = data.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(data, 0, data.Length);
requestStream.Close();
WebResponse response = request.GetResponse(); // 400 throwed here
Stream responseStream = response.GetResponseStream();
StreamReader responseStreamReader = new StreamReader(responseStream);
string result = responseStreamReader.ReadToEnd();
return true;
}
Json String for 'bool BuildHotel(string)' upon
{
"Guid":"ea59c011-d656-4870-b29b-30a44e668560",
"Receptions":[
{"Floor":1,"Number":1},
{"Floor":2,"Number":2}
],
"Rooms":[
{
"Number":"c",
"Furnitures":[
{"Name":"1","Manufacturer":{"Name":"1","Telephone":"1"}},
{"Name":"2","Manufacturer":{"Name":"2","Telephone":"2"}}
],
"Manufacturer":{"Name":"c","Telephone":"c"}
}
],
"Name":"x",
"Address":"x",
"Manufacturer":{"Name":"x","Telephone":"x"}
}

Answer 1

it expects such kind of JSON:
{"k_BackingField":{"k_BackingField":"4","k_BackingField":"4"},"k_BackingField":"x","k_BackingField":"ea59c011-d656-4870-b29b-30a44e668560","k_BackingField":"x","k_BackingField":[{"k_BackingField":1,"k_BackingField":1},{"k_BackingField":2,"k_BackingField":2}],"k_BackingField":[{"k_BackingField":{"k_BackingField":"3","k_BackingField":"3"},"k_BackingField":[{"k_BackingField":{"k_BackingField":"1","k_BackingField":"1"},"k_BackingField":"1"},{"k_BackingField":{"k_BackingField":"2","k_BackingField":"2"},"k_BackingField":"2"}],"k__BackingField":null}]}
To change it you can mark all your data contracts with DataContract and DataMember attribute:
[DataContract]
public abstract class Building
{
[DataMember]
public Manufacturer Manufacturer { get; set; }
}
In this case it will understand json as you have given us in the question and will process it successfully.