好的,我会尽量简短明了地翻译。我从一个公共API获取了一个JSON字符串,看起来像这样:(只有两个示例的简短版本)
[{
"$type": "Tfl.Api.Presentation.Entities.Line, Tfl.Api.Presentation.Entities",
"id": "bakerloo",
"name": "Bakerloo",
"modeName": "tube",
"disruptions": [],
"created": "2017-03-16T15:56:01.01Z",
"modified": "2017-03-16T15:56:01.01Z",
"lineStatuses": [
{
"$type": "Tfl.Api.Presentation.Entities.LineStatus, Tfl.Api.Presentation.Entities",
"id": 0,
"statusSeverity": 10,
"statusSeverityDescription": "Good Service",
"created": "0001-01-01T00:00:00",
"validityPeriods": []
}
],
"routeSections": [],
"serviceTypes": [
{
"$type": "Tfl.Api.Presentation.Entities.LineServiceTypeInfo, Tfl.Api.Presentation.Entities",
"name": "Regular",
"uri": "/Line/Route?ids=Bakerloo&serviceTypes=Regular"
}
],
"crowding": {
"$type": "Tfl.Api.Presentation.Entities.Crowding, Tfl.Api.Presentation.Entities"
}
},
{
"$type": "Tfl.Api.Presentation.Entities.Line, Tfl.Api.Presentation.Entities",
"id": "central",
"name": "Central",
"modeName": "tube",
"disruptions": [],
"created": "2017-03-16T15:56:01.01Z",
"modified": "2017-03-16T15:56:01.01Z",
"lineStatuses": [
{
"$type": "Tfl.Api.Presentation.Entities.LineStatus, Tfl.Api.Presentation.Entities",
"id": 0,
"statusSeverity": 10,
"statusSeverityDescription": "Good Service",
"created": "0001-01-01T00:00:00",
"validityPeriods": []
}
],
"routeSections": [],
"serviceTypes": [
{
"$type": "Tfl.Api.Presentation.Entities.LineServiceTypeInfo, Tfl.Api.Presentation.Entities",
"name": "Regular",
"uri": "/Line/Route?ids=Central&serviceTypes=Regular"
},
{
"$type": "Tfl.Api.Presentation.Entities.LineServiceTypeInfo, Tfl.Api.Presentation.Entities",
"name": "Night",
"uri": "/Line/Route?ids=Central&serviceTypes=Night"
}
],
"crowding": {
"$type": "Tfl.Api.Presentation.Entities.Crowding, Tfl.Api.Presentation.Entities"
}
}]
目前为止还不错,接下来我将粘贴相关代码,我正在尝试将从 json2csharp 免费在线服务获取的JSON字符串反序列化为C#类。我尝试实现此操作的相关代码如下:
public async static Task<tubeStatusRootObject> GetTubeStatus(string url)
{
var http = new HttpClient();
var response = await http.GetAsync(url);
var result = await response.Content.ReadAsStringAsync(); //This is working
var deserializer = new DataContractJsonSerializer(typeof(tubeStatusRootObject));
var ms = new MemoryStream(Encoding.UTF8.GetBytes(result));
var data = (tubeStatusRootObject)deserializer.ReadObject(ms);
return data; //all "data" properties are null
}
正如您可以从上面的评论中看到的,我在返回之前获取的所有内部数据都为null。
由json2csharp生成的类如下所示:
[DataContract]
public class Disruption
{
[DataMember]
public string type { get; set; }
[DataMember]
public string category { get; set; }
[DataMember]
public string categoryDescription { get; set; }
[DataMember]
public string description { get; set; }
[DataMember]
public string additionalInfo { get; set; }
[DataMember]
public string created { get; set; }
[DataMember]
public List<object> affectedRoutes { get; set; }
[DataMember]
public List<object> affectedStops { get; set; }
[DataMember]
public string closureText { get; set; }
[DataMember]
public bool? isWholeLine { get; set; }
}
[DataContract]
public class LineStatus
{
[DataMember]
public string type { get; set; }
[DataMember]
public int id { get; set; }
[DataMember]
public int statusSeverity { get; set; }
[DataMember]
public string statusSeverityDescription { get; set; }
[DataMember]
public string created { get; set; }
[DataMember]
public List<object> validityPeriods { get; set; }
[DataMember]
public string lineId { get; set; }
[DataMember]
public string reason { get; set; }
[DataMember]
public Disruption disruption { get; set; }
}
[DataContract]
public class ServiceType
{
[DataMember]
public string type { get; set; }
[DataMember]
public string name { get; set; }
[DataMember]
public string uri { get; set; }
}
[DataContract]
public class Crowding
{
[DataMember]
public string type { get; set; }
}
[DataContract]
public class tubeStatusRootObject
{
[DataMember]
public string type { get; set; }
[DataMember]
public string id { get; set; }
[DataMember]
public string name { get; set; }
[DataMember]
public string modeName { get; set; }
[DataMember]
public List<object> disruptions { get; set; }
[DataMember]
public string created { get; set; }
[DataMember]
public string modified { get; set; }
[DataMember]
public List<LineStatus> lineStatuses { get; set; }
[DataMember]
public List<object> routeSections { get; set; }
[DataMember]
public List<ServiceType> serviceTypes { get; set; }
[DataMember]
public Crowding crowding { get; set; }
}
显然,我只是添加了
[DataContract]
和[DataMember]
。有没有人知道我做错了什么并能帮助我?我按照Channel9上的示例进行操作。
请不要标记为重复问题,因为我找到了很多类似的问题,有些使用newtonsoft json,但我无法将那里的解决方案应用到我的示例中。