c# - Newtonsoft JSON.NET 解析为自定义键/值对对象数组

Question

我在解析给定的 JSON 数据时遇到了这个奇怪的问题。我有这个 JSON 结构:

{"value":[
  {"street":"Karlova 25"},
  {"city":"Prague"},
  {"gpsLat":"50.1571"},
  {"gpsLon":"15.0482"}
]}

如何使用 Newtonsoft JSON.NET 库解析此结构？我尝试使用自己的 JsonConverter 类:

public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer){
  JArray jarray = (JArray)((JTokenReader)reader).CurrentToken;
  List<AddressValue> values = new List<AddressValue>();
  foreach (var jobj in jarray.Children<JObject>()){
    foreach (JProperty prop in jobj.Properties()){
      values.Add(new AddressValue() { Label = prop.Name, Value = prop.Value.ToString() });
    }
  }
  return values.ToArray();
}

class AddressValue{
  public string Label { get; set; }
  public string Value { get; set; }
}

但我有一个异常(exception):

Exception thrown: 'Newtonsoft.Json.JsonSerializationException' in Newtonsoft.Json.DLL

Additional information: Unexpected token when deserializing object: StartObject. Path 'value[0]'.

编辑: 我还尝试将其保存到字典中:

 [JsonProperty(PropertyName = "value")]
 public Dictionary<string, string> Value{get; set;}

但我有另一个异常(exception):

$exception  {"Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'System.Collections.Generic.Dictionary`2[System.String,System.String]' 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 JSON object (e.g. {\"name\":\"value\"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array.\r\nPath 'param.value'."}

我做错了什么？谢谢您的回答。

Answer 1

您不需要重新发明轮子。该功能已经可以使用了。 创建如下所示的类:

public class Value
{
    public string street { get; set; }
    public string city { get; set; }
    public string gpsLat { get; set; }
    public string gpsLon { get; set; }
}

public class MyClass
{
    public List<Value> value { get; set; }
}

现在您可以简单地将 json 反序列化为 poco 对象。

MyClass result  = JsonConvert.DeserializeObject<MyClass>(youJson);