我正在尝试从网站上调用我的WCF服务上的POST方法。但是,WCF服务抱怨json字符串无效。
WCF服务方法:
[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, UriTemplate = "reserve/batteries", BodyStyle = WebMessageBodyStyle.Bare)]
public bool ReserveBatteries(ReserveModel values)
从网站调用POST的方法:
var stations = TempData["Stations"];
string jsonStations = JsonHelper.SerializeJson(stations);
HttpWebRequest httpWReq = (HttpWebRequest)WebRequest.Create("http://localhost:49288/reserve/batteries");
UTF8Encoding encoding = new UTF8Encoding();
string postData = "{\"Stations\": " + jsonStations;
postData += ", \"User\": \"" + User.Identity.Name + "\" }";
byte[] data = encoding.GetBytes(postData);
httpWReq.Method = "POST";
httpWReq.ContentType = "application/json; charset=utf-8";
httpWReq.ContentLength = data.Length;
using (Stream stream = httpWReq.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
HttpWebResponse response = (HttpWebResponse)httpWReq.GetResponse();
string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
我正在使用Newtonsoft json libary来序列化。 我试图发送给我的服务的json字符串是:
{
"Stations": [
{
"BatteryStorages": null,
"CreatedDate": "2013-06-06T00:00:00+02:00",
"Description": "Aalborg City",
"Edges": [],
"ID": 3,
"IsActive": true,
"IsOperational": true,
"Reservations": [],
"StationLat": 57.02881,
"StationLong": 9.91777,
"StationMaintenances": [],
"StationType": null,
"Title": "Aalborg",
"TypeId": 1,
}
],
"User": "user1"
}
我已使用JsonLint对此进行了验证,并说它是一个有效的字符串。
WCF接受的无效字符串(根据JsonLint):
{
"Stations": "[
{
BatteryStorages:null,
CreatedDate:\"/Date(1370469600000+0200)/\",
Description:\"Aalborg City\",
Edges:[],
ID:\"3\",
IsActive:\"true\",
IsOperational:\"true\",
Reservations:[],
StationLat:\"57.02881\",
StationLong:\"9.91777\",
StationMaintenances:[],
StationType:null,
Title:\"Aalborg\",
TypeId:\"1\"
}
]",
"User": "user1"
}
从WCF抛出的异常:
反序列化RestfulAPI.Resources.ReserveModel类型的对象时出错。从命名空间''预期结束元素'Stations'。从命名空间''找到元素'item'。
这怎么可能?为什么WCF抱怨它在jsonlint(和其他人)说它无效时无效。
编辑:
[DataContract]
public class ReserveModel
{
[DataMember]
public string Stations { get; set; }
[DataMember]
public string User { get; set; }
}
答案 0 :(得分:5)
问题是您的Model对象格式不正确。
要从JSON创建正确的JSON类,可以使用json2csharp,或者如果有,例如VS2012更新2,则可以复制JSON并将JSON粘贴为类(编辑 - >选择性粘贴> ;将JSON粘贴为类)。
您必须记住,例如,必须以WCF支持的特定方式传递DateTime对象。有关此内容的更多信息,请参见here (msdn - WCF JSON serialization)。要避开此问题,您只需键入变量为string并在以后转换它。
希望这有帮助!