使用 json.net/RestSharp 在 C# 中使用元数据反序列化 JSON

Question

我正在尝试创建一个数据集，其中包含我从 API.

接收的 JSON 文件中的信息

当出现 "Unexpected JSON token when reading..." 时，我不断收到 JsonSerializationException。意外的标记是一些我似乎无法摆脱的元数据（"paging" 等）。有没有一种方法可以忽略元数据，甚至根本不接收元数据？

Json 文件:

 {
  "paging": {
    "size": 8
  },
  "data": {
    "devices": [
      {
        "hostName": "x",
        "networkAddress": "x",
        "bestState": "Down",
        "worstState": "Down",
        "name": "x",
        "id": "1301"
      },
      {
        "hostName": "x",
        "networkAddress": "x",
        "bestState": "Down",
        "worstState": "Down",
        "name": "x",
        "id": "1299"
      },
      {
        "hostName": "x",
        "networkAddress": "x",
        "bestState": "Down",
        "worstState": "Down",
        "name": "x",
        "id": "1296"
      },
      {
        "hostName": "x",
        "networkAddress": "x",
        "bestState": "Down",
        "worstState": "Down",
        "name": "x",
        "id": "1291"
      },
      {
        "hostName": "x",
        "networkAddress": "x",
        "bestState": "Down",
        "worstState": "Down",
        "name": "x",
        "id": "1261"
      },
      {
        "hostName": "x",
        "networkAddress": "x",
        "bestState": "Down",
        "worstState": "Down",
        "name": "x",
        "id": "1249"
      },
      {
        "hostName": "x",
        "networkAddress": "x",
        "bestState": "Up",
        "worstState": "Down",
        "name": "x",
        "id": "157"
      },
      {
        "hostName": "x",
        "networkAddress": "x",
        "bestState": "Up",
        "worstState": "Down",
        "name": "x",
        "id": "205"
      }
    ]
  }
}

我的代码

             //Following block (2) taken from Postman, looks for device down group using bearer token retreived from block (1)
            var client2 = new RestClient("x");
            client2.Timeout = -1;
            var request2 = new RestRequest(Method.GET);
            request2.AddHeader("Authorization", "bearer " + bearer.access_token);
            IRestResponse response2 = client2.Execute(request2);
            textBox1.Text = response2.Content;
            //end of block (2)

            //Deserialize dataset from downDevices
            DataSet dataSet = JsonConvert.DeserializeObject<DataSet>(response2.Content);
            DataTable dataTable = dataSet.Tables["devices"];
            foreach (DataRow row in dataTable.Rows)
            {
                textBox1.AppendText(row["name"] + " - " + row["networkAddress"]);

            }

到目前为止，我找到但未能尝试的唯一可能的解决方案是在 Newtonsoft 文档中：https://www.newtonsoft.com/json/help/html/DeserializeMetadataPropertyHandling.htm 但是，我不确定是否有办法将此对象与数据集结合使用。

            object o = JsonConvert.DeserializeObject(response2.Content, new JsonSerializerSettings
            {
                TypeNameHandling = TypeNameHandling.All,

                MetadataPropertyHandling = MetadataPropertyHandling.ReadAhead //maybe use ignore?
            });
            //end of test Object

如果这是一个相当 basic/stupid 的问题或似乎重复出现，我深表歉意，我已经解决了尽可能多的类似问题并尝试了一些可能的解决方案，但无济于事。如果我的任何术语是 weird/wrong，我进一步道歉，我对 C# 和整个 API 是全新的。

提前致谢！

Answer 1

您的 JSON 无效："networkAddress": "x,，对象中缺少 " id 1299

Answer 2

问题在于您尝试反序列化的方式。如果您只需要反序列化 Devices 对象，DataTable反序列化就可以工作。但是加上Paging（不是有效数据集）和Data objs，你需要写一个自定义的class来反序列化这个obj并指向DataTable。像这样：

public static void Deserialize()
    {
      string response2 = "{ \"paging\": { \"size\": 8 }, \"data\": { \"devices\": [ { \"hostName\": \"x\", \"networkAddress\": \"x\", \"bestState\": \"Down\", \"worstState\": \"Down\", \"name\": \"x\", \"id\": \"1301\" }] } } ";
      var dataSet = JsonConvert.DeserializeObject<Target>(response2);
      Console.WriteLine(dataSet);

      DataTable dataTable = dataSet.data.devices;
      Console.WriteLine(dataTable);

      foreach(DataRow row in dataTable.Rows)
      {
        Console.WriteLine(row["hostname"]+" :name");
      }         
    }
}
class Target
{
    public object paging{get;set;}
    public Device data{get;set;}
}

class Device
{
    public DataTable devices {get;set;}
}

使用 json.net/RestSharp 在 C# 中使用元数据反序列化 JSON

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