将JSON转换为对象失败-无法将当前JSON对象反序列化为System.Collections.Generic.List [英] Converting JSON to Object fails - Cannot deserialize the current JSON object into System.Collections.Generic.List

问题描述

我正在使用www.textlocal.in的API，该API返回JSON格式的对象.

I'm using the API of www.textlocal.in, which returns a JSON formatted object.

JSON

{  
   "warnings":[  
      {  
         "message":"Number is in DND",
         "numbers":"917000000000"
      }
   ],
   "balance":900,
   "batch_id":311110011,
   "cost":1,
   "num_messages":1,
   "message":{  
      "num_parts":1,
      "sender":"TXTLCL",
      "content":"Test1"
   },
   "receipt_url":"",
   "custom":"",
   "inDND":[  
      "917000000000"
   ],
   "messages":[  
      {  
         "id":"1350123781",
         "recipient":918819437284
      }
   ],
   "status":"success"
}

我要用来解析JSON的代码:

private void button1_Click(object sender, EventArgs e)
{
    var a = JsonConvert.DeserializeObject<List<jsonToObj[]>>(richTextBox1.Text);
}

public class jsonToObj
{
    public warnings[] warnings { get; set; }

    public int balance { get; set; }
    public int batch_id { get; set; }
    public int cost { get; set; }
    public int num_messages { get; set; }
    public message message { get; set; }
    public string receipt_url { get; set; }
    public string custom { get; set; }
    public messages[] messages { get; set; }
    public string status { get; set; }
}


public class warnings
{
    public string message { get; set; }
    public string numbers { get; set; }
}

public class messages
{
    public string id { get; set; }
    public int recipient { get; set; }
}

public class message
{
    public int num_part { get; set; }
    public string sender { get; set; }
    public string content { get; set; }
}

我收到以下消息的异常消息:

Newtonsoft.Json.JsonSerializationException:'无法反序列化 当前的JSON对象(例如{"name":"value"}) 'System.Collections.Generic.List`1 [WindowsFormsApp1.Form2 + jsonToObj []]' 因为该类型需要JSON数组(例如[1,2,3])进行反序列化 正确地.要解决此错误，请将JSON更改为JSON数组 (例如[1,2,3])或更改反序列化类型，以使其成为常规 .NET类型(例如，不是整数之类的原始类型，不是集合 可以从JSON反序列化的类型(如数组或列表) 目的.也可以将JsonObjectAttribute添加到类型中以强制它 从JSON对象反序列化.路径警告"，第1行，位置 12.'

Newtonsoft.Json.JsonSerializationException: 'Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1[WindowsFormsApp1.Form2+jsonToObj[]]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly. To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object. Path 'warnings', line 1, position 12.'

推荐答案

首先，您必须弄清楚API返回的内容.

First of all you have to figure out what your API returns.

现在，您正在尝试解析jsonToObj Arrays(List<jsonToObj[]>)的List.您必须决定使用API​​现在提供的jsonToObj[]或List<jsonToObj>还是简单的jsonToObj:

Right now you're trying to parse a List of jsonToObj Arrays (List<jsonToObj[]>). You have to decide whether to use a jsonToObj[] or List<jsonToObj> or a simple jsonToObj which your API provides now:

var a = JsonConvert.DeserializeObject<jsonToObj>(richTextBox1.Text);

但是这会引发:

JSON整数918819437284对于Int32而言太大或太小.路径"messages [0] .recipient"，第25行，位置33."

JSON integer 918819437284 is too large or small for an Int32. Path 'messages[0].recipient', line 25, position 33."

因此请确保为此使用Long.

public class messages
{
    public string id { get; set; }
    public long recipient { get; set; }
}

此外，如果需要以下信息，您可以将inDND添加到您的jsonToObj类中:

Furthermore you can add inDND to your jsonToObj class if you need the info:

public class jsonToObj
{
  ...
  public string[] inDND { get; set; }
  ...
}

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