Asp.net Newtonsoft.Json 序列化返回空的 json 对象

发布于03月12日

我有以下类的对象列表:

public class Catagory
{
    int catagoryId;
    string catagoryNameHindi;
    string catagoryNameEnglish;
    List<Object> subCatagories;
    public Catagory(int Id, string NameHindi, string NameEng,List<Object> l)
    {
        this.catagoryId = Id;
        this.catagoryNameHindi = NameHindi;
        this.catagoryNameEnglish = NameEng;
        this.subCatagories = l;
    }
}

  public class SubCatagory
{
    int subCatagoryId { get; set; }
    string subCatNameHindi { get; set; }
    string subCatNameEng { get; set; }

    public SubCatagory(int Id, string NameHindi, string NameEng)
    {
        this.subCatagoryId = Id;
        this.subCatNameEng = NameEng;
        this.subCatNameHindi = NameHindi;
    }
}

当我使用Newtonsoft将此列表转换为json字符串时.Json返回空对象array.

  string json=JsonConvert.SerializeObject(list);

我得到以下结果.

[{},{},{},{},{}]

请帮我解决这个问题.

推荐答案

默认情况下，NewtonSoft.Json将仅序列化公共成员，因此请将您的字段设置为公共:

public class Catagory
{
    public int catagoryId;
    public string catagoryNameHindi;
    public string catagoryNameEnglish;
    public List<Object> subCatagories;

    public Catagory(int Id, string NameHindi, string NameEng, List<Object> l)
    {
        this.catagoryId = Id;
        this.catagoryNameHindi = NameHindi;
        this.catagoryNameEnglish = NameEng;
        this.subCatagories = l;
    }
}

Edit:如果出于某种原因，你真的不想公开你的字段，你可以用JsonPropertyAttribute来修饰它们，让它们可以被序列化和反序列化: