可移植库 对象反序列化数组时出错

Question

我有一个 WebApi 返回以下 JSON，我正在尝试将其反序列化为下面的对象

JSON 对象

{
"results": [{
"id": 123456,
"fullName": "Foo Bar",
"localName": null,
"jobPosition": "ME",
"jobCompanyName": "EXTRA",
"jobLocationCountry": "United States of America",
"jobLocationCity": "San Francisco",
"jobCountrySubdivision": "California",
"boards": [],
"restrictionsIndicator": false,
"personRestriction": null,
"jobRestriction": null
}, {
"id": 789101,
"fullName": "Foo Bar",
"localName": null,
"jobPosition": null,
"jobCompanyName": "Unknown",
"jobLocationCountry": "Unknown",
"jobLocationCity": "Unknown",
"jobCountrySubdivision": "Unknown",
"boards": [{
"companyId": 667525,
"companyName": "FOO BAR COMPANY",
"companyOffLimits": null,
"restrictionCategoryId": null
}
],
"restrictionsIndicator": false,
"personRestriction": null,
"jobRestriction": null
}
],
"totalCount": 2,
"pageNumber": 1,
"resultsPerPage": 100
}

C# 类

public class Rootobject
{
public Result[] results { get; set; }
public int totalCount { get; set; }
public int pageNumber { get; set; }
public int resultsPerPage { get; set; }
}
public class Result
{
public int id { get; set; }
public string fullName { get; set; }
public object localName { get; set; }
public string jobPosition { get; set; }
public string jobCompanyName { get; set; }
public string jobLocationCountry { get; set; }
public string jobLocationCity { get; set; }
public string jobCountrySubdivision { get; set; }
public Board[] boards { get; set; }
public bool restrictionsIndicator { get; set; }
public int? personRestriction { get; set; }
public int? jobRestriction { get; set; }
}
public class Board
{
public int companyId { get; set; }
public string companyName { get; set; }
public int? companyOffLimits { get; set; }
public object restrictionCategoryId { get; set; }
}

DLL是一个可移植类库，它是.NET 4.5，我通过nuget安装了 JSON.net(10.0.1)，但可移植库连接到Mac上的xamarin IOS项目。

如果正在反序列化的 JSON 没有Boards它工作正常，但如果有Board，那么我会收到以下消息。

Unable to find a constructor to use for type Board. A class should either have a default constructor, one constructor with arguments or a constructor marked with the JsonConstructor attribute. Path 'results[1].boards[0].companyId'

我正在使用的设置是：

var settings = new Newtonsoft.Json.JsonSerializerSettings
{
NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore,
ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver(),
};

我已经尝试了以下方法来使其序列化：

1. var obj = Newtonsoft.Json.JsonConvert.DeserializeObject<Rootobject>(_jsonString, settings);

2. var jobject = Newtonsoft.Json.JsonConvert.DeserializeAnonymousType(_jsonString, new Rootobject());

我尝试了以下方法

• 放入默认构造函数
• 在构造函数中命名类的所有参数
• 将属性添加到构造函数
• 将看板更改为列表
• 取出董事会属性

但仍然没有快乐。它不会为我反序列化。

Answer 1

我认为你必须修改这个

public class Board
{
public int companyId { get; set; }
public string companyName { get; set; }
public int? companyOffLimits { get; set; }
public object restrictionCategoryId { get; set; }
**public Board(){}**
}

也在其他班级

或者也改变

public Board[] boards { get; set; }

自

public List<Board> boards { get; set; }

尝试。。。。