这是我的Json对象
{
"id":5,
"url":"http://localhost:8001/api/courses/5",
"name":"Professional Experience II",
"duration":"5.0",
"description":"The course will talk in depth about every thing",
"tutor": {
"id":2,
"email":"TA@mymail.com",
"userName":"TA",
"firstName":"T",
"lastName":"A",
"gender":0
},
"subject":
{
"id":2,
"name":"Science"
}
}
我的模特就在这里
public class CourseModel
{
public int Id { get; set; }
public string Url { get; set; }
public string Name { get; set; }
public double Duration { get; set; }
public string Description { get; set; }
public TutorModel Tutor { get; set; }
public SubjectModel Subject { get; set; }
}
这就是我得到这个对象的方式。我能够获取jsonObject但无法将其反序列化为相应的模型
string url = "http://localhost:8001/api/courses/5";
HttpResponseMessage responseMessage = await client.GetAsync(url);
if (responseMessage.IsSuccessStatusCode)
{
var responseData = responseMessage.Content.ReadAsStringAsync().Result;
var data = JsonConvert.DeserializeObject<List<CourseModel>>(responseData);
return View(data);
}
return View("Error:);
我得到的错误是
无法反序列化当前的JSON对象（例如{“name”：“value”}） 进入类型 'System.Collections.Generic.List`1 [Learning.Web.Models.CourseModel]' 因为该类型需要一个JSON数组（例如[1,2,3]）来反序列化 正确。要修复此错误，请将JSON更改为JSON数组 （例如[1,2,3]）或更改反序列化类型以使其正常 .NET类型（例如，不是整数的基本类型，不是集合 类似于数组或List的类型，可以从JSON反序列化 宾语。 JsonObjectAttribute也可以添加到类型中以强制它 从JSON对象反序列化。路径'id'，第1行，第6位。
我正在使用WebApi，我不确定我在这里做错了什么..任何帮助将不胜感激
更新：
根据Shyju和Habib的回答，如果我将其反序列化为单个实例但是如果我将URL更改为
，则它确实有效string url = "http://localhost:8001/api/courses";
并将其反序列化为List，我得到相同的错误，这里是json对象
{
"totalCount":32,
"totalPages":4,
"prevPageLink":"",
"nextPageLink":"http://localhost:8001/api/courses?page=1&pageSize=10",
"results":[
{
"id":1,
"url":"http://localhost:8001/api/courses/1",
"name":"History Teaching Methods 1",
"duration":3.0,
"description":"The course will talk in depth about: History Teaching Methods 1",
"tutor":{
"id":1,
"email":"h@outlook.com",
"userName":"A,
"firstName":"A",
"lastName":"J",
"gender":0
},
"subject":{
"id":1,
"name":"History"
}
},
{
"id":2,
"url":"http://localhost:8001/api/courses/2",
"name":"History Teaching Methods 2",
"duration":5.0,
"description":"The course will talk in depth about: History Teaching Methods 2",
"tutor":{
"id":1,
"email":"A.Jo@fg.com",
"userName":"AJo",
"firstName":"A",
"lastName":"Jo",
"gender":0
},
"subject":{
"id":1,
"name":"History"
}
},
{
"id":3,
"url":"http://localhost:8001/api/courses/3",
"name":"History Teaching Methods 3",
"duration":5.0,
"description":"The course will talk in depth about: History Teaching Methods 3",
"tutor":{
"id":1,
"email":"A@outlook.com",
"userName":"A",
"firstName":"A",
"lastName":"J",
"gender":0
},
"subject":{
"id":1,
"name":"History"
}
},
{
"id":4,
"url":"http://localhost:8001/api/courses/4",
"name":"Professional Experience 1 (Mathematics/Science)",
"duration":5.0,
"description":"The course will talk in depth about: Professional Experience 1 (Mathematics/Science)",
"tutor":{
"id":2,
"email":"T.A@mymail.com",
"userName":"T",
"firstName":"T",
"lastName":"A",
"gender":0
},
"subject":{
"id":2,
"name":"Science"
}
},
{
"id":5,
"url":"http://localhost:8001/api/courses/5",
"name":"Professional Experience 2 (Mathematics/Science)",
"duration":5.0,
"description":"The course will talk in depth about: Professional Experience 2 (Mathematics/Science)",
"tutor":{
"id":2,
"email":"TA@mymail.com",
"userName":"T",
"firstName":"T",
"lastName":"A",
"gender":0
},
"subject":{
"id":2,
"name":"Science"
}
},
{
"id":6,
"url":"http://localhost:8001/api/courses/6",
"name":"Professional Experience 3 (Mathematics/Science)",
"duration":5.0,
"description":"The course will talk in depth about: Professional Experience 3 (Mathematics/Science)",
"tutor":{
"id":2,
"email":"TA@mymail.com",
"userName":"T",
"firstName":"T",
"lastName":"A",
"gender":0
},
"subject":{
"id":2,
"name":"Science"
}
},
{
"id":7,
"url":"http://localhost:8001/api/courses/7",
"name":"Geography Teaching Methods 1",
"duration":5.0,
"description":"The course will talk in depth about: Geography Teaching Methods 1",
"tutor":{
"id":3,
"email":"TW@mymail.com",
"userName":"Ti",
"firstName":"T",
"lastName":"W",
"gender":0
},
"subject":{
"id":3,
"name":"Geography"
}
},
{
"id":8,
"url":"http://localhost:8001/api/courses/8",
"name":"Geography Teaching Methods 2",
"duration":5.0,
"description":"The course will talk in depth about: Geography Teaching Methods 2",
"tutor":{
"id":3,
"email":"p@mymail.com",
"userName":"f",
"firstName":"f",
"lastName":"f",
"gender":0
},
"subject":{
"id":3,
"name":"Geography"
}
},
{
"id":9,
"url":"http://localhost:8001/api/courses/9",
"name":"Geography Teaching Methods 3",
"duration":5.0,
"description":"The course will talk in depth about: Geography Teaching Methods 3",
"tutor":{
"id":3,
"email":"s.s@mymail.com",
"userName":"s",
"firstName":"s",
"lastName":"s",
"gender":0
},
"subject":{
"id":3,
"name":"Geography"
}
},
{
"id":10,
"url":"http://localhost:8001/api/courses/10",
"name":"English Education 1",
"duration":5.0,
"description":"The course will talk in depth about: English Education 1",
"tutor":{
"id":4,
"email":"g.g@outlook.com",
"userName":"g",
"firstName":"g",
"lastName":"g",
"gender":0
},
"subject":{
"id":4,
"name":"English"
}
}
]
}
答案 0 :(得分：3)
您的JSON代表CourseModel的单个实例。您应该将其反序列化为CourseModel的单个实例，而不是其中的列表。
这应该有用。
var data = JsonConvert.DeserializeObject<CourseModel>(responseData);
答案 1 :(得分：0)
我相信您已正确设置了Tutor和Subject类错误，因为您尝试将单个对象反序列化为List<T>
DO：
var data = JsonConvert.DeserializeObject<CourseModel>(responseData);
另外，要创建相关模型，您可以将JSON粘贴到http://json2csharp.com/并获取生成的模型，如下所示：
public class Tutor
{
public int id { get; set; }
public string email { get; set; }
public string userName { get; set; }
public string firstName { get; set; }
public string lastName { get; set; }
public int gender { get; set; }
}
public class Subject
{
public int id { get; set; }
public string name { get; set; }
}
public class CourseModel
{
public int id { get; set; }
public string url { get; set; }
public string name { get; set; }
public string duration { get; set; }
public string description { get; set; }
public Tutor tutor { get; set; }
public Subject subject { get; set; }
}