在数组中有命名项的C#中解析/反序列化JSON

Question

我需要反序列化以下JSON：

    "response": {
       "records": {
          "record-1": {
             "id": "1",
             "name": "foo"
        },
        "record-2": {                 
             "id": "2",
             "name": "foo"
        },
        "record-3": {
             "id": "3",
             "name": "foo-bar"
        }
      }
    }

我使用下面的C#代码来反序列化上面的JSON：

    HttpWebRequest httpWebRequest = System.Net.WebRequest.Create(requestUrl) as HttpWebRequest;
    using (HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse)
    {
        if (httpWebResponse.StatusCode != HttpStatusCode.OK)
            throw new Exception(string.Format("Server error (HTTP {0}: {1}).", httpWebResponse.StatusCode, httpWebResponse.StatusDescription));

        Stream stream = httpWebResponse.GetResponseStream());
        DataContractJsonSerializer dataContractJsonSerializer = new DataContractJsonSerializer(typeof(MyResponseClass));
        objResponse = dataContractJsonSerializer.ReadObject(stream);
        if (objResponse == null)
            return null;
    }


    [DataContract]
    class MyResponseClass
    {
        [DataMember]
        public Response response { get; set; }
    }

    [DataContract]
    public class Response
    {
        [DataMember]
        public Records records { get; set; }
    }

    [DataContract]
    public class Records
    {
        [DataMember(Name = "record-1")]
        Record record_1 { get; set; }
        [DataMember(Name = "record-2")]
        Record record_2 { get; set; }
        [DataMember(Name = "record-3")]
        Record record_3 { get; set; }
    }
    [DataContract]
    public class Record
    {
        [DataMember]
        public string id { get; set; }
        [DataMember]
        public string name { get; set; }
    }

当然，有一种更好的方法来获取“记录”下的“记录”数组，这使得在代码中单独定义每条记录的可伸缩性变得不可伸缩。我知道可以使用JSON阅读器，但我更喜欢简单的反序列化例程。

我希望能够将JSON反序列化为记录列表(例如List，我如何实现这一点？

Answer 1

我认为在您的情况下，最好完全删除Records类，并在Response类中将Records属性的类型更改为IDictionary<string, Record>。因此，您的类结构可能如下所示：

[DataContract]
class MyResponseClass
{
    [DataMember(Name = "response")]
    public Response Response { get; set; }
}

[DataContract]
public class Response
{
    [DataMember(Name = "records")]
    public IDictionary<string, Record> Records { get; set; }
}

[DataContract]
public class Record
{
    [DataMember(Name = "id")]
    public string Id { get; set; }

    [DataMember(Name = "name")]
    public string Name { get; set; }
}

您可以始终将JSON视为C#中的IDictionary<string, object>。它使理解JSON变得容易得多。

我还建议使用DataMember属性的Name属性，因为您可以保持C#属性的命名遵循指导原则。

Answer 2

解决方案很简单你的json应该是这样的格式

​

{"response": {
       "records": {
          "record-1": {
             "id": "1",
             "name": "foo"
        },
        "record-2": {                 
             "id": "2",
             "name": "foo"
        },
        "record-3": {
             "id": "3",
             "name": "foo-bar"
        }
      }
    }
	}

​

要使用json.net解析这个json，只需运行下面的代码，它就会简单得多，而且功能也更强大。

​

 var recordsJson = jsonObject.SelectToken("response").SelectToken("records").Children<JProperty>().Select(p=>p.Value).ToList();
            foreach (var rec in recordsJson)
            {
                var record = JsonConvert.DeserializeObject<Record>(rec.ToString());
                Records.Add(record);
            }

​

我们将所有记录放到一个jobject列表中，然后以最简单的方式解析每条记录，并将每条记录添加到列表中。

Answer 3

  MyResponse myResponse = null;

  HttpWebRequest httpWebRequest = System.Net.WebRequest.Create(requestUrl) as HttpWebRequest;
  using (HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse)
  {
    if (httpWebResponse.StatusCode != HttpStatusCode.OK)
        throw new Exception(string.Format("Server error (HTTP {0}: {1}).", httpWebResponse.StatusCode, httpWebResponse.StatusDescription));

    Stream stream = httpWebResponse.GetResponseStream());
    using (StreamReader streamReader = new StreamReader(stream))
    {
        myResponse = JsonConvert.DeserializeObject<MyResponse>(streamReader.ReadToEnd());

    }
  }

  return myResponse;



[DataContract]
class MyResponseClass
{
    [DataMember]
    public Response response { get; set; }
}

[DataContract]
public class Response
{
    [DataMember(Name = "records")]
    public IDictionary<string, Record> Records { get; set; }
}

[DataContract]
public class Record
{
    [DataMember]
    public string id { get; set; }
    [DataMember]
    public string name { get; set; }
}