如何使用 JsonConvert.DeserializeObject 反序列化此 JSON答案

【问题标题】：How to deserialize this JSON with JsonConvert.DeserializeObject如何使用 JsonConvert.DeserializeObject 反序列化此 JSON
【发布时间】：2016-03-21 15:05:45
【问题描述】：

我正在尝试反序列化此 JSON，但我不断收到错误消息。有人可以帮帮我吗？我哪里做错了？

JSON:

{
    "totalItems": 63,
    "items": [
    {
        "id": 100039812,
        "group": {
            "code": "DD",
            "description": "Delivery Documents"
        },
        "type": {
            "code": "READ",
            "description": "Logs"
        },
        "reference": "ARLDR",
        "date": "2015-03-24T00:00:00",
        "description": "ALogs",
        "notes": "",
        "lastUpdateDate": "2015-03-24T14:06:42.063",
        "location": "BOX A001",
        "metadata": {}
    },
    {
        "id": 100039813,
        "group": {
            "code": "DD",
            "description": "Delivery Documents"
        },
        "type": {
            "code": "BL",
            "description": "Logbooks"
        },
        "reference": "BALB",
        "date": "2015-03-24T00:00:00",
        "description": "Logbooks",
        "notes": "",
        "lastUpdateDate": "2015-03-24T14:07:42.44",
        "location": "BOX A001",
        "metadata": {}
        }
    ]
}

public class Documents
{
    public int totalItems  { get; set; }
    public List<doc_items> items { get; set; }
}

public class doc_items
{
    public int id { get; set; }
    public List<group_items> group { get; set; }
    public List<type_items> type { get; set; }
    public string reference { get; set; }
    public string date { get; set; }
    public string description { get; set; }
    public string notes { get; set; }
    public string lastUpdateDate { get; set; }
    public string location { get; set; }
    public List<metadata_list> metadata { get; set; }
}

public class group_items
{
    public string code { get; set; }
    public string description { get; set; }
}

public class type_items
{
    public string code { get; set; }
    public string description { get; set; }
}

public class metadata_list
{

}

然后我称之为：

Documents myDocuments = JsonConvert.DeserializeObject<Documents>(responsetext.ToString());

并收到以下错误：

错误：Newtonsoft.Json.JsonSerializationException：无法将当前 JSON 对象（例如 {"name":"value"}）反序列化为 System.Collections.Generic.List`1[AerData.Ranorex.Web.Records.API_Documents+Documents]' 类型，因为该类型需要 JSON 数组（例如 [...

【问题讨论】：

使用编辑 -> 选择性粘贴 -> 将 JSON 粘贴为类，或使用 jsonutils.com 将您的 json 字符串粘贴到新的类文件中 - 您的类不完全匹配

标签： c# json serialization deserialization

【解决方案1】：

相反，“组”、“类型”和“元数据”不是数组，因此请将您的类修改为：

public class doc_items
{
    public int id { get; set; }
    public group_items group { get; set; }
    public type_items type { get; set; }
    public string reference { get; set; }
    public string date { get; set; }
    public string description { get; set; }
    public string notes { get; set; }
    public string lastUpdateDate { get; set; }
    public string location { get; set; }
    public metadata_list metadata { get; set; }
}

【讨论】：

【解决方案2】：

根据Documents 类的定义，doc_items 的group 属性必须是一个数组。在您给定的 JSON 中，它是一个对象。 type 属性也是如此

【讨论】：

【解决方案3】：

我建议使用这样的转换器：http://json2csharp.com/#

试试这个：

class Program
{
    static void Main(string[] args)
    {
        var sr = new StreamReader("json.json");
        var jsonText = sr.ReadToEnd();
        Documents myDocuments = JsonConvert.DeserializeObject<Documents>(jsonText);
    }
}

public class group_items
{
    public string code { get; set; }
    public string description { get; set; }
}

public class type_items
{
    public string code { get; set; }
    public string description { get; set; }
}

public class metadata_list
{
}

public class doc_items
{
    public int id { get; set; }
    public group_items GroupItems { get; set; }
    public type_items TypeItems { get; set; }
    public string reference { get; set; }
    public string date { get; set; }
    public string description { get; set; }
    public string notes { get; set; }
    public string lastUpdateDate { get; set; }
    public string location { get; set; }
    public metadata_list MetadataList { get; set; }
}

public class Documents
{
    public int totalItems { get; set; }
    public List<doc_items> items { get; set; }
}

您的数据文件json.json

{
  "totalItems": 63,
  "items": [
    {
      "id": 100039812,
      "group": {
        "code": "DD",
        "description": "Delivery Documents"
      },
      "type": {
        "code": "READ",
        "description": "Logs"
      },
      "reference": "ARLDR",
      "date": "2015-03-24T00:00:00",
      "description": "ALogs",
  "notes": "",
  "lastUpdateDate": "2015-03-24T14:06:42.063",
  "location": "BOX A001",
  "metadata": { }
},
{
  "id": 100039813,
  "group": {
    "code": "DD",
    "description": "Delivery Documents"
  },
  "type": {
    "code": "BL",
    "description": "Logbooks"
  },
  "reference": "BALB",
  "date": "2015-03-24T00:00:00",
  "description": "Logbooks",
  "notes": "",
  "lastUpdateDate": "2015-03-24T14:07:42.44",
  "location": "BOX A001",
  "metadata": { }
    }
  ]
}

【讨论】：