无法将 json 转换为对象

Question

您好，我收到了这条错误消息

"Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'ClassLibraryMifosX.ViewModels.Rootobject2' because the type requires a JSON object (e.g. {\"name\":\"value\"}) to deserialize correctly.\r\nTo fix this error either change the JSON to a JS

我的反序列化代码：

Rootobject Rsc = JsonConvert.DeserializeObject<Rootobject>(json);

我的 class 和 json 对象描述：

public class Rootobject
{
    public List<Class1> Property1 { get; set; }
}

public class Class1
{
    public int entityId { get; set; }
    public string entityAccountNo { get; set; }
    public string entityExternalId { get; set; }
    public string entityName { get; set; }
    public string entityType { get; set; }
    public int parentId { get; set; }
    public string parentName { get; set; }
    public string entityMobileNo { get; set; }
    public Entitystatus entityStatus { get; set; }
}

public class Entitystatus
{
    public int id { get; set; }
    public string code { get; set; }
    public string value { get; set; }
}

我的 json :

[
  {
    "entityId": 1,
    "entityAccountNo": "000000001",
    "entityExternalId": "100001-241563",
    "entityName": "Smith W R",
    "entityType": "CLIENT",
    "parentId": 1,
    "parentName": "Head Office",
    "entityMobileNo": "254728000000",
    "entityStatus": {
      "id": 300,
      "code": "clientStatusType.active",
      "value": "Active"
    }
  },
  {
    "entityId": 310,
    "entityAccountNo": "000000310",
    "entityName": "John Smith",
    "entityType": "CLIENT",
    "parentId": 14,
    "parentName": "TestOffice1",
    "entityStatus": {
      "id": 300,
      "code": "clientStatusType.active",
      "value": "Active"
    }
  },
  {
    "entityId": 422,
    "entityAccountNo": "000000422",
    "entityExternalId": "smith1",
    "entityName": "Smith Jones",
    "entityType": "CLIENT",
    "parentId": 11,
    "parentName": "Barquisimeto",
    "entityMobileNo": "88989898",
    "entityStatus": {
      "id": 300,
      "code": "clientStatusType.active",
      "value": "Active"
    }
  },
  {
    "entityId": 774,
    "entityAccountNo": "000000774",
    "entityName": "John AAA Smith",
    "entityType": "CLIENT",
    "parentId": 1,
    "parentName": "Head Office",
    "entityStatus": {
      "id": 300,
      "code": "clientStatusType.active",
      "value": "Active"
    }
  },
  {
    "entityId": 1789,
    "entityAccountNo": "Head Office000001789",
    "entityExternalId": "547222",
    "entityName": "Kaitlin Smith",
    "entityType": "CLIENT",
    "parentId": 1,
    "parentName": "Head Office",
    "entityStatus": {
      "id": 300,
      "code": "clientStatusType.active",
      "value": "Active"
    }
  }
]

我做错了什么？谢谢

Answer 1

您的 JSON 的第一个和最后一个字符是方括号 [ ] 而不是大括号 { }。这意味着它是一个数组，而不是一个对象。为了解析它，您需要将其反序列化为 array of Class1 objects:

Class1[] Rsc = JsonConvert.DeserializeObject<Class1[]>(json);

如果您想改用 Rootobject 对象，则可以这样使用它：

Rootobject root = new RootObject();
root.Property1 = new List<Class1>(Rsc);

Answer 2

您的 Json 数据中没有根对象，因此只需将其反序列化为 Class1 的集合，如下所示：

var collection = JsonConvert.DeserializeObject<List<Class1>>(json);

不要忘记 VS 可以为您创建一个 class 可用于反序列化您的 Json 数据。您不需要自己编写 Class1 的定义。只需转到菜单 => 编辑 > 选择性粘贴 > 将 JSON 粘贴为 classes

无法将 json 转换为对象

Cannot convert json to object

c#

asp.net-mvc

deserialization

json-deserialization