c# - 反序列化对象时出错

Question

我有一个 JSON 字符串。

[  
 {  
  "target":"FDOL00001",
  "datapoints":[  
     {  
        "y":72.564,
        "x":1523858700
     }
  ]
 },
 {  
  "target":"FDOL00001",
  "datapoints":[  
     {  
        "y":86.366,
        "x":1523858700
     }
  ]
 },
 {  
  "target":"FDOL00001",
  "datapoints":[  
     {  
        "y":73.90195818815343,
        "x":1523858700
     }
  ]
 }
]

我正在尝试将其反序列化为一个集合。但是我收到一个错误。有人可以指导我解决此问题的正确方法吗？

class datapoint
{
    [JsonProperty("x")]
    public int x { get; set; }
    [JsonProperty("y")]
    public decimal y { get; set; }
}
class jsonMapper
{
    [JsonProperty("target")]
    public string target { get; set; }
    [JsonProperty("datapoints")]
    public datapoint datapoints { get; set; }
}

我正在尝试使用以下代码进行转换。

var json = JsonConvert.DeserializeObject<List<jsonMapper>>(objText);

我得到的错误是

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'ISSPortal2.datapoint' 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 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 '[0].datapoints', line 1, position 40.

我已经查过了this .但它不起作用。 我的代码有什么问题。请帮我识别一下。提前致谢:)

Answer 1

您正在尝试将数组 datapoint[] 反序列化为 datapoint。

改变

public datapoint datapoints { get; set; }

到

public datapoint[] datapoints { get; set; }

奖励:C# 命名约定，建议您在公共(public)属性中使用大写字母。

class Datapoint
{
    [JsonProperty("x")]
    public int X { get; set; }
    [JsonProperty("y")]
    public decimal Y { get; set; }
}
class JsonMapper
{
    [JsonProperty("target")]
    public string Target { get; set; }
    [JsonProperty("datapoints")]
    public Datapoint Datapoints { get; set; }
}