c# - 如何将具有索引引用的 JSON 数据反序列化为强类型 C# 对象？

Question

我想反序列化 JSON 数据(使用 Newtonsoft)，类似于以下内容，并在 C# 中转换为强类型对象/列表，但无法弄清楚如何定义类，以便将索引引用转换为引用对象。

{
  "Countries": [
    {
      "Name": "USA",

    },
    {
      "Name": "UK",
    },
    {
      "Name": "JAPAN",
    },
  ],
  "Authors": [
    {
      "DisplayName": "John Doe",
      "RealName": "Not John Doe"
    },
    {
      "DisplayName": "Jane Doe",
      "RealName": "Not Jane Doe"
    },
  ],
  "Books": [
    {
      "Author": 0,
      "Title": "A good read",
      "PublishedCountries": "0,1",

    },
    {
      "Author": 0,
      "Title": "Another good read",
      "PublishedCountries": "0,1",
    },
    {
      "Author": 1,
      "Title": "This one is even better",
      "PublishedCountries": "0,1,2",
    },
  ],
}

理想情况下，我想使用类似于以下的类:

public class Country
{
  public string Name { get; set;}
}

public class AuthorDetails
{
  public string DisplayName { get; set; }
  public string RealName { get; set; }
}

public class Book
{
  public AuthorDetails Author { get; set; }
  public string Title { get; set; }
  public IEnumerable<Country> PublishedCountries { get; set; }
}

public class ListOfBooks
{
  public IEnumerable<Book> Books { get; set; }
}

像这样反序列化:

var listOfBooks = JsonConvert.DeserializeObject<ListOfBooks>(jsonAsString);

我不知道如何告诉 Json.Net JObject 书中的 Author 属性是一个索引，而不是一个整数。 PublishedCountries 也是如此(这是以逗号分隔的索引列表)

Answer 1

除了稍微帮助反序列化过程之外，我看不到其他方法。

var dynObj = (JObject)JsonConvert.DeserializeObject(json);

var authors = dynObj["Authors"]
                .Select(j => new AuthorDetails { 
                            RealName = (string)j["RealName"], 
                            DisplayName = (string)j["DisplayName"] 
                })
                .ToList();

var countries = dynObj["Countries"]
                .Select(j => new Country { Name = (string)j["Name"]})
                .ToList();

var books = dynObj["Books"].Select(x => new Book
                {
                    Author = authors[(int)x["Author"]],
                    Title = (string)x["Title"],
                    PublishedCountries = x["PublishedCountries"].ToString().Split(',')
                                            .Select(i =>countries[int.Parse(i)])
                                            .ToList()
                })
                .ToList();

---

public class Country
{
    public string Name { get; set; }
}

public class AuthorDetails
{
    public string DisplayName { get; set; }
    public string RealName { get; set; }
}

public class Book
{
    public AuthorDetails Author { get; set; }
    public string Title { get; set; }
    public List<Country> PublishedCountries { get; set; }
}